{"id":28124,"date":"2026-06-16T14:32:09","date_gmt":"2026-06-16T06:32:09","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/?p=28124"},"modified":"2026-06-16T14:42:20","modified_gmt":"2026-06-16T06:42:20","slug":"smd-capacitor","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/","title":{"rendered":"SMD Capacitor: Sizes, Codes, Polarity and Selection"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#What_Is_an_SMD_Capacitor\" >What Is an SMD Capacitor?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#What_Does_SMD_Mean_on_a_Capacitor\" >What Does SMD Mean on a Capacitor?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#What_Is_the_Value_of_an_SMD_Capacitor\" >What Is the Value of an SMD Capacitor?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#How_to_Identify_an_SMD_Capacitor_on_a_PCB\" >How to Identify an SMD Capacitor on a PCB?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#How_to_Read_SMD_Capacitor_Codes_and_Markings\" >How to Read SMD Capacitor Codes and Markings?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#What_Are_Common_SMD_Capacitor_Sizes\" >What Are Common SMD Capacitor Sizes?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#SMD_Capacitor_Size_Chart_and_Footprint_Dimensions\" >SMD Capacitor Size Chart and Footprint Dimensions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#What_Are_the_Main_Types_of_SMD_Capacitors\" >What Are the Main Types of SMD Capacitors?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#Are_SMD_Capacitors_Polarized\" >Are SMD Capacitors Polarized?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#How_to_Choose_SMD_Capacitor_Value_Voltage_and_Package\" >How to Choose SMD Capacitor Value, Voltage and Package?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#How_to_Test_a_Bad_or_Shorted_SMD_Capacitor\" >How to Test a Bad or Shorted SMD Capacitor?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#SMD_Capacitor_vs_Through-Hole_Capacitor_What_Is_the_Difference\" >SMD Capacitor vs Through-Hole Capacitor: What Is the Difference?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/#FAQs_About_SMD_Capacitor\" >FAQs About SMD Capacitor<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div>\n<p>An <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/\" title=\"\">SMD capacitor <\/a>is a surface-mount capacitor soldered directly onto PCB pads. It is widely used in modern PCB assembly because it saves space, supports automated SMT production, and works well in compact electronic circuits.<\/p>\n\n\n\n<p>However, choosing or replacing an SMD capacitor is not always as simple as matching one number. You may need to check its capacitance value, package size, voltage rating, dielectric type, polarity, footprint, and circuit function. Many small ceramic SMD capacitors also have no printed marking, which makes identification more difficult.<\/p>\n\n\n\n<p>This guide explains SMD capacitor values, codes, sizes, polarity, types, selection rules, and testing methods in a practical way.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-1.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-1.jpg\" alt=\"SMD Capacitor\" class=\"wp-image-28146\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-1.jpg 800w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-1-300x169.jpg 300w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-1-768x432.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_an_SMD_Capacitor\"><\/span>What Is an SMD Capacitor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>An SMD capacitor is a capacitor designed for surface mount technology. Instead of using long leads that pass through PCB holes, it is mounted directly on solder pads on the PCB surface.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">A typical SMD capacitor has:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A compact body<\/li>\n\n\n\n<li>Metal terminations or leads<\/li>\n\n\n\n<li>A capacitance value<\/li>\n\n\n\n<li>A voltage rating<\/li>\n\n\n\n<li>A dielectric material<\/li>\n\n\n\n<li>A package size<\/li>\n\n\n\n<li>A tolerance and temperature rating<\/li>\n<\/ul>\n\n\n\n<p>The most common <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/smd-capacitor\/\">SMD capacitor <\/a>is the MLCC, or multilayer ceramic capacitor. MLCCs are widely used because they are small, low-cost, non-polarized, and suitable for automated SMT assembly.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">SMD capacitors are commonly used for:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Decoupling<\/li>\n\n\n\n<li>Bypassing<\/li>\n\n\n\n<li>Filtering<\/li>\n\n\n\n<li>Coupling<\/li>\n\n\n\n<li>Timing<\/li>\n\n\n\n<li>Noise suppression<\/li>\n\n\n\n<li>Power rail stabilization<\/li>\n\n\n\n<li>RF tuning<\/li>\n\n\n\n<li>Signal conditioning<\/li>\n<\/ul>\n\n\n\n<p>In simple terms, an SMD capacitor stores and releases electrical charge in a compact package. It helps circuits operate more stably while reducing PCB space.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Does_SMD_Mean_on_a_Capacitor\"><\/span>What Does SMD Mean on a Capacitor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>SMD means <strong>Surface Mount Device<\/strong>. On a capacitor, it means the component is made for surface mounting on a PCB.<\/p>\n\n\n\n<p>SMD does not define the capacitance value, voltage rating, dielectric material, or polarity. It only describes the mounting style.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">An SMD capacitor can be:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ceramic<\/li>\n\n\n\n<li>Tantalum<\/li>\n\n\n\n<li>Aluminum electrolytic<\/li>\n\n\n\n<li>Polymer<\/li>\n\n\n\n<li>Film<\/li>\n\n\n\n<li>Specialty capacitor<\/li>\n<\/ul>\n\n\n\n<p>For example, a 100 nF ceramic capacitor in a 0603 package and a 100 \u00b5F SMD electrolytic capacitor are both SMD capacitors. But they are used in different circuits and follow different selection rules.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">So when you see \u201cSMD capacitor,\u201d the next questions should be:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What is the capacitance value?<\/li>\n\n\n\n<li>What is the package size?<\/li>\n\n\n\n<li>What is the voltage rating?<\/li>\n\n\n\n<li>Is it polarized?<\/li>\n\n\n\n<li>What dielectric or capacitor type is used?<\/li>\n\n\n\n<li>What is its function in the circuit?<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_the_Value_of_an_SMD_Capacitor\"><\/span>What Is the Value of an SMD Capacitor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The value of an SMD capacitor is its capacitance. It tells how much electrical charge the capacitor can store. Capacitance is usually measured in <strong>pF<\/strong>, <strong>nF<\/strong>, or <strong>\u00b5F<\/strong>.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Different units are used because capacitor values cover a wide range:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Small capacitance values are usually written in <strong>pF<\/strong><\/li>\n\n\n\n<li>Medium capacitance values are often written in <strong>nF<\/strong><\/li>\n\n\n\n<li>Larger capacitance values are usually written in <strong>\u00b5F<\/strong><\/li>\n<\/ul>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">A simple way to understand the units is:<\/mark><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Value Range<\/th><th class=\"has-text-align-center\" data-align=\"center\">Common Unit<\/th><th class=\"has-text-align-center\" data-align=\"center\">Typical Example<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Small capacitance<\/td><td class=\"has-text-align-center\" data-align=\"center\">pF<\/td><td class=\"has-text-align-center\" data-align=\"center\">10 pF, 100 pF<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Medium capacitance<\/td><td class=\"has-text-align-center\" data-align=\"center\">nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">1 nF, 10 nF, 100 nF<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Large capacitance<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u00b5F<\/td><td class=\"has-text-align-center\" data-align=\"center\">1 \u00b5F, 10 \u00b5F, 47 \u00b5F<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Common SMD capacitor values include:<\/mark><\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Common Value<\/th><th class=\"has-text-align-center\" data-align=\"center\">Also Written As<\/th><th class=\"has-text-align-center\" data-align=\"center\">Typical Use<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">10 pF<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.01 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">RF circuits and timing circuits<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">100 pF<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.1 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">Signal filtering<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">1,000 pF \/ 0.001 \u00b5F<\/td><td class=\"has-text-align-center\" data-align=\"center\">Noise filtering<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">10 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.01 \u00b5F<\/td><td class=\"has-text-align-center\" data-align=\"center\">Coupling or filtering<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">100 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.1 \u00b5F<\/td><td class=\"has-text-align-center\" data-align=\"center\">IC decoupling<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1 \u00b5F<\/td><td class=\"has-text-align-center\" data-align=\"center\">1,000 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">Power rail stabilization<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">10 \u00b5F<\/td><td class=\"has-text-align-center\" data-align=\"center\">10,000 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">Power rail support<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">47 \u00b5F or higher<\/td><td class=\"has-text-align-center\" data-align=\"center\">47,000 nF or higher<\/td><td class=\"has-text-align-center\" data-align=\"center\">Power input filtering and energy storage<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>A very common SMD capacitor value is <strong>100 nF<\/strong>, also written as <strong>0.1 \u00b5F<\/strong>. It is often placed near IC power pins to reduce voltage noise.<\/p>\n\n\n\n<p>The correct value depends on the circuit function. A decoupling capacitor, RF capacitor, timing capacitor, coupling capacitor, and power input capacitor may all need different values, even if they look similar on the PCB.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Identify_an_SMD_Capacitor_on_a_PCB\"><\/span>How to Identify an SMD Capacitor on a PCB?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Identifying an SMD capacitor on a PCB depends on its size, package, marking, and location. Larger SMD capacitors may have printed markings, while small ceramic capacitors are often blank.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">You can identify an SMD capacitor by checking:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>PCB reference designator<\/strong><br>Capacitors are usually marked as C1, C2, C10, C101, or similar on the PCB silkscreen.<\/li>\n\n\n\n<li><strong>Component shape<\/strong><br>MLCCs are usually small rectangular blocks. Tantalum and electrolytic capacitors are often larger and may show polarity marks.<\/li>\n\n\n\n<li><strong>Color and body style<\/strong><br>Ceramic capacitors are often beige, brown, gray, or off-white. Tantalum capacitors may be yellow or black. Aluminum electrolytic capacitors are often cylindrical.<\/li>\n\n\n\n<li><strong>Marking or code<\/strong><br>Some larger SMD capacitors show capacitance, voltage, polarity, or manufacturer codes.<\/li>\n\n\n\n<li><strong>Circuit location<\/strong><br>A capacitor near an IC power pin is often used for decoupling. A capacitor near a power input may be used for filtering or bulk energy storage.<\/li>\n\n\n\n<li><strong>BOM and schematic<\/strong><br>The most reliable source is the BOM, schematic, assembly drawing, or original component part number.<\/li>\n\n\n\n<li><strong>Measurement<\/strong><br>An LCR meter can help measure capacitance, but in-circuit measurement may be affected by other components.<\/li>\n<\/ul>\n\n\n\n<p>Do not rely only on color or size. Two MLCCs with the same package and color may have completely different values. For repair or replacement, confirm the value through design files, circuit function, markings, or measurement after removal.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Read_SMD_Capacitor_Codes_and_Markings\"><\/span>How to Read SMD Capacitor Codes and Markings?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>SMD capacitor codes depend on the capacitor type. Some SMD capacitors have printed codes, but many small MLCCs do not.<\/p>\n\n\n\n<p>Most small ceramic SMD capacitors in 0201, 0402, 0603, and 0805 packages are unmarked. Their values are usually confirmed by the BOM, reel label, schematic, or measurement.<\/p>\n\n\n\n<p>When a capacitor uses a three-digit code, the first two digits are the base number, and the third digit tells how many zeros are added in pF.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Code<\/th><th class=\"has-text-align-center\" data-align=\"center\">Value<\/th><th class=\"has-text-align-center\" data-align=\"center\">Also Written As<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">101<\/td><td class=\"has-text-align-center\" data-align=\"center\">100 pF<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.1 nF<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">102<\/td><td class=\"has-text-align-center\" data-align=\"center\">1 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">1,000 pF<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">103<\/td><td class=\"has-text-align-center\" data-align=\"center\">10 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.01 \u00b5F<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">104<\/td><td class=\"has-text-align-center\" data-align=\"center\">100 nF<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.1 \u00b5F<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">105<\/td><td class=\"has-text-align-center\" data-align=\"center\">1 \u00b5F<\/td><td class=\"has-text-align-center\" data-align=\"center\">1,000 nF<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">106<\/td><td class=\"has-text-align-center\" data-align=\"center\">10 \u00b5F<\/td><td class=\"has-text-align-center\" data-align=\"center\">10,000 nF<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Example:<\/p>\n\n\n\n<p><strong>104 = 10 + 4 zeros = 100,000 pF = 100 nF = 0.1 \u00b5F<\/strong><\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">For tantalum and aluminum electrolytic SMD capacitors, markings may show:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Capacitance<\/li>\n\n\n\n<li>Voltage rating<\/li>\n\n\n\n<li>Polarity<\/li>\n\n\n\n<li>Manufacturer code<\/li>\n\n\n\n<li>Series code<\/li>\n\n\n\n<li>Date or lot code<\/li>\n<\/ul>\n\n\n\n<p>For example, a capacitor marked \u201c10 16V\u201d may indicate 10 \u00b5F and 16V, but marking rules vary by manufacturer. Always confirm with the datasheet when the marking is unclear.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_Common_SMD_Capacitor_Sizes\"><\/span>What Are Common SMD Capacitor Sizes?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>SMD capacitor size refers to the physical package dimensions of the component. The package size affects PCB space, capacitance range, voltage rating, assembly difficulty, inspection, rework, and reliability.<\/p>\n\n\n\n<p>Common SMD capacitor sizes include 0201, 0402, 0603, 0805, 1206, 1210, 1812, and 2220.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Imperial <br>Code<\/th><th class=\"has-text-align-center\" data-align=\"center\">Metric <br>Code<\/th><th class=\"has-text-align-center\" data-align=\"center\">Approx.<br>Dimensions (mm)<\/th><th class=\"has-text-align-center\" data-align=\"center\">Approx.<br>Dimensions (inch)<\/th><th class=\"has-text-align-center\" data-align=\"center\">Common <br>Use<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">0201<\/td><td class=\"has-text-align-center\" data-align=\"center\">0603<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.6 \u00d7 0.3<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.024 \u00d7 0.012<\/td><td class=\"has-text-align-center\" data-align=\"center\">Ultra-compact modules<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0402<\/td><td class=\"has-text-align-center\" data-align=\"center\">1005<\/td><td class=\"has-text-align-center\" data-align=\"center\">1.0 \u00d7 0.5<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.040 \u00d7 0.020<\/td><td class=\"has-text-align-center\" data-align=\"center\">Mobile devices and compact PCBA<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0603<\/td><td class=\"has-text-align-center\" data-align=\"center\">1608<\/td><td class=\"has-text-align-center\" data-align=\"center\">1.6 \u00d7 0.8<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.063 \u00d7 0.031<\/td><td class=\"has-text-align-center\" data-align=\"center\">General electronics<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">0805<\/td><td class=\"has-text-align-center\" data-align=\"center\">2012<\/td><td class=\"has-text-align-center\" data-align=\"center\">2.0 \u00d7 1.25<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.079 \u00d7 0.049<\/td><td class=\"has-text-align-center\" data-align=\"center\">Industrial boards and prototypes<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1206<\/td><td class=\"has-text-align-center\" data-align=\"center\">3216<\/td><td class=\"has-text-align-center\" data-align=\"center\">3.2 \u00d7 1.6<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.126 \u00d7 0.063<\/td><td class=\"has-text-align-center\" data-align=\"center\">Power rails and larger capacitance<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1210<\/td><td class=\"has-text-align-center\" data-align=\"center\">3225<\/td><td class=\"has-text-align-center\" data-align=\"center\">3.2 \u00d7 2.5<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.126 \u00d7 0.098<\/td><td class=\"has-text-align-center\" data-align=\"center\">Higher capacitance or voltage<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">1812<\/td><td class=\"has-text-align-center\" data-align=\"center\">4532<\/td><td class=\"has-text-align-center\" data-align=\"center\">4.5 \u00d7 3.2<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.177 \u00d7 0.126<\/td><td class=\"has-text-align-center\" data-align=\"center\">Higher voltage or power circuits<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">2220<\/td><td class=\"has-text-align-center\" data-align=\"center\">5750<\/td><td class=\"has-text-align-center\" data-align=\"center\">5.7 \u00d7 5.0<\/td><td class=\"has-text-align-center\" data-align=\"center\">0.224 \u00d7 0.197<\/td><td class=\"has-text-align-center\" data-align=\"center\">High capacitance or special use<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Small packages save space, but they can be harder to assemble, inspect, and rework. They may also have weaker real capacitance performance under DC bias.<\/p>\n\n\n\n<p>Larger packages need more PCB area, but they may support higher capacitance, higher voltage, better solder joint visibility, and easier repair.<\/p>\n\n\n\n<p>For example, a 10 \u00b5F ceramic capacitor in a very small package may lose a large part of its effective capacitance under DC bias. A larger package or higher voltage rating may perform better in real operation.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-2.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-2-768x1024.jpg\" alt=\"SMD Capacitor\" class=\"wp-image-28148\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-2-768x1024.jpg 768w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-2-225x300.jpg 225w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-2.jpg 1086w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"SMD_Capacitor_Size_Chart_and_Footprint_Dimensions\"><\/span>SMD Capacitor Size Chart and Footprint Dimensions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>An SMD capacitor package and an SMD capacitor footprint are related, but they are not the same.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Package size<\/strong> means the physical size of the capacitor body.<\/li>\n\n\n\n<li><strong>Footprint<\/strong> means the PCB solder pad pattern used to mount the capacitor.<\/li>\n\n\n\n<li><strong>Land pattern<\/strong> is another term for the PCB pad design.<\/li>\n\n\n\n<li><strong>Pad gap<\/strong> affects alignment and soldering result.<\/li>\n\n\n\n<li><strong>Pad size<\/strong> affects solder wetting, fillet shape, and inspection.<\/li>\n<\/ul>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">A good footprint should support:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stable pick-and-place alignment<\/li>\n\n\n\n<li>Proper solder joint formation<\/li>\n\n\n\n<li>Enough solder wetting area<\/li>\n\n\n\n<li>Reliable reflow soldering<\/li>\n\n\n\n<li>Lower tombstoning risk<\/li>\n\n\n\n<li>Manufacturable spacing from nearby parts<\/li>\n\n\n\n<li>Easier inspection and rework when needed<\/li>\n<\/ul>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Footprint problems can cause:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tombstoning<\/li>\n\n\n\n<li>Component skew<\/li>\n\n\n\n<li>Open solder joints<\/li>\n\n\n\n<li>Weak solder joints<\/li>\n\n\n\n<li>Solder beading<\/li>\n\n\n\n<li>Poor wetting<\/li>\n\n\n\n<li>Difficult inspection<\/li>\n<\/ul>\n\n\n\n<p>Do not copy a footprint randomly from another design. The correct land pattern may depend on the capacitor package, manufacturer recommendation, solder paste thickness, reflow process, PCB surface finish, assembly capability, and inspection requirement.<\/p>\n\n\n\n<p>For reliable PCBA manufacturing, confirm both the SMD capacitor package and the recommended footprint before finalizing the PCB layout.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_the_Main_Types_of_SMD_Capacitors\"><\/span>What Are the Main Types of SMD Capacitors?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>SMD capacitors are available in several types. Each type has different electrical behavior, size, cost, polarity, voltage range, and application area.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">The main types include:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SMD ceramic capacitor \/ MLCC<\/li>\n\n\n\n<li>SMD tantalum capacitor<\/li>\n\n\n\n<li>SMD aluminum electrolytic capacitor<\/li>\n\n\n\n<li>SMD polymer capacitor<\/li>\n\n\n\n<li>SMD film capacitor<\/li>\n<\/ul>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">SMD Ceramic Capacitor<\/mark><\/strong><\/p>\n\n\n\n<p>SMD ceramic capacitors are the most common type. Most are MLCCs.<\/p>\n\n\n\n<p>They are widely used because they are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Small<\/li>\n\n\n\n<li>Low-cost<\/li>\n\n\n\n<li>Non-polarized<\/li>\n\n\n\n<li>Good for high-frequency circuits<\/li>\n\n\n\n<li>Suitable for automated SMT assembly<\/li>\n\n\n\n<li>Available in many package sizes<\/li>\n<\/ul>\n\n\n\n<p>Common applications include decoupling, bypassing, filtering, RF circuits, and general PCB design.<\/p>\n\n\n\n<p>The key point to remember is DC bias. High-capacitance MLCCs may lose effective capacitance when voltage is applied, especially in small packages.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">SMD Tantalum Capacitor<\/mark><\/strong><\/p>\n\n\n\n<p>SMD tantalum capacitors are often used when higher capacitance density and stable capacitance are needed.<\/p>\n\n\n\n<p>They are commonly used in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Power rails<\/li>\n\n\n\n<li>Filtering circuits<\/li>\n\n\n\n<li>Compact power designs<\/li>\n\n\n\n<li>Some industrial and communication electronics<\/li>\n<\/ul>\n\n\n\n<p>They are polarized, so correct orientation is required. Reverse voltage or surge current may cause failure, so voltage derating is important.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">SMD Aluminum Electrolytic Capacitor<\/mark><\/strong><\/p>\n\n\n\n<p>SMD aluminum electrolytic capacitors are usually used for larger capacitance values.<\/p>\n\n\n\n<p>They are common in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Power input filtering<\/li>\n\n\n\n<li>Bulk energy storage<\/li>\n\n\n\n<li>Power supply circuits<\/li>\n\n\n\n<li>Industrial electronics<\/li>\n<\/ul>\n\n\n\n<p>They are polarized and usually larger than ceramic capacitors. ESR, ripple current, temperature, and lifetime should be checked before selection.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">SMD Polymer Capacitor<\/mark><\/strong><\/p>\n\n\n\n<p>SMD polymer capacitors are used when the circuit needs low ESR and better ripple current performance.<\/p>\n\n\n\n<p>They are useful for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>DC-DC converters<\/li>\n\n\n\n<li>Power rails<\/li>\n\n\n\n<li>High-current power circuits<\/li>\n\n\n\n<li>Low-ESR filtering<\/li>\n<\/ul>\n\n\n\n<p>They usually cost more than standard electrolytic capacitors, but they can provide better power performance.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">SMD Film Capacitor<\/mark><\/strong><\/p>\n\n\n\n<p>SMD film capacitors are less common than MLCCs, but they are useful in circuits that need stability, low loss, or pulse performance.<\/p>\n\n\n\n<p>They may be used in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Signal circuits<\/li>\n\n\n\n<li>Timing circuits<\/li>\n\n\n\n<li>Pulse circuits<\/li>\n\n\n\n<li>Selected power applications<\/li>\n<\/ul>\n\n\n\n<p>They are often larger than ceramic capacitors, so they are not used everywhere.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-3.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-3-1024x768.jpg\" alt=\"SMD Capacitor\" class=\"wp-image-28147\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-3-1024x768.jpg 1024w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-3-300x225.jpg 300w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-3-768x576.jpg 768w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/06\/smd-capacitor\u200b-3.jpg 1448w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Are_SMD_Capacitors_Polarized\"><\/span>Are SMD Capacitors Polarized?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Some SMD capacitors are polarized, and some are non-polarized.<\/p>\n\n\n\n<p>Most SMD ceramic capacitors are non-polarized. They can usually be installed in either direction because they do not have positive and negative terminals.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Common non-polarized types include:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MLCC ceramic capacitors<\/li>\n\n\n\n<li>Some film capacitors<\/li>\n\n\n\n<li>Some specialty capacitors<\/li>\n<\/ul>\n\n\n\n<p>Tantalum, aluminum electrolytic, and many polymer capacitors are polarized. They must be installed in the correct direction.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Common polarized types include:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SMD tantalum capacitor<\/li>\n\n\n\n<li>SMD aluminum electrolytic capacitor<\/li>\n\n\n\n<li>SMD polymer capacitor<\/li>\n<\/ul>\n\n\n\n<p>If a polarized capacitor is installed backwards, it may fail, heat up, leak, short, or damage the circuit.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">You can check polarity by looking for:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Plus mark<\/li>\n\n\n\n<li>Stripe mark<\/li>\n\n\n\n<li>Beveled edge<\/li>\n\n\n\n<li>Printed polarity symbol<\/li>\n\n\n\n<li>PCB silkscreen<\/li>\n\n\n\n<li>Datasheet orientation<\/li>\n\n\n\n<li>Package style<\/li>\n<\/ul>\n\n\n\n<p>Be careful because polarity markings differ by capacitor type. Tantalum capacitors often mark the positive side, while aluminum electrolytic capacitors often mark the negative side. If the marking is unclear, check the datasheet before assembly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Choose_SMD_Capacitor_Value_Voltage_and_Package\"><\/span>How to Choose SMD Capacitor Value, Voltage and Package?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Choosing the right SMD capacitor requires more than matching the capacitance value. A suitable capacitor should match the electrical requirement, package size, footprint, assembly process, and working environment.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Check these points before selection:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Capacitance value<\/strong><br>Select the required pF, nF, or \u00b5F value based on the circuit function.<\/li>\n\n\n\n<li><strong>Voltage rating<\/strong><br>Choose a voltage rating higher than the working voltage. Do not operate the capacitor too close to its rated limit.<\/li>\n\n\n\n<li><strong>Package size<\/strong><br>Match the package with PCB space, capacitance range, voltage rating, and assembly capability.<\/li>\n\n\n\n<li><strong>Dielectric type<\/strong><br>C0G\/NP0, X7R, X5R, and other dielectrics behave differently. Use stable dielectrics for precision or temperature-sensitive circuits.<\/li>\n\n\n\n<li><strong>DC bias performance<\/strong><br>MLCC capacitance may drop under applied DC voltage. Check the datasheet curve when the capacitor is used on a DC power rail.<\/li>\n\n\n\n<li><strong>ESR and ripple current<\/strong><br>These are important for power supply, converter, and filtering applications.<\/li>\n\n\n\n<li><strong>Polarity<\/strong><br>Confirm whether the capacitor is polarized before assembly or replacement.<\/li>\n\n\n\n<li><strong>Footprint<\/strong><br>Make sure the package matches the PCB pad pattern.<\/li>\n\n\n\n<li><strong>Temperature range<\/strong><br>Match the capacitor to the product operating environment.<\/li>\n\n\n\n<li><strong>Availability<\/strong><br>For production, check supply stability and possible alternative parts.<\/li>\n<\/ul>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Common mistakes include:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Choosing only by capacitance<\/li>\n\n\n\n<li>Ignoring DC bias<\/li>\n\n\n\n<li>Using too low a voltage rating<\/li>\n\n\n\n<li>Confusing polarized and non-polarized capacitors<\/li>\n\n\n\n<li>Using the wrong footprint<\/li>\n\n\n\n<li>Replacing a capacitor only by size<\/li>\n\n\n\n<li>Ignoring temperature and lifetime requirements<\/li>\n<\/ul>\n\n\n\n<p>A better selection process is to check the BOM, schematic, datasheet, layout footprint, assembly process, and application conditions together.<\/p>\n\n\n\n<p>For PCBA projects, BOM review before production can help confirm capacitor package, voltage rating, polarity, footprint, sourcing risk, and possible alternatives.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Test_a_Bad_or_Shorted_SMD_Capacitor\"><\/span>How to Test a Bad or Shorted SMD Capacitor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Testing an SMD capacitor depends on whether it is still mounted on the PCB or removed from the circuit. In-circuit testing can be misleading because other components may be connected in parallel.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Common signs of a bad SMD capacitor include:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Short circuit<\/li>\n\n\n\n<li>Burn marks<\/li>\n\n\n\n<li>Cracking<\/li>\n\n\n\n<li>Leakage<\/li>\n\n\n\n<li>Bulging on electrolytic types<\/li>\n\n\n\n<li>Low capacitance<\/li>\n\n\n\n<li>High ESR<\/li>\n\n\n\n<li>Power rail short<\/li>\n\n\n\n<li>Circuit instability<\/li>\n\n\n\n<li>Device not powering on<\/li>\n<\/ul>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">A practical testing process:<\/mark><\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Start with visual inspection<\/strong><br>Check for cracks, burns, discoloration, leakage, lifted pads, or broken solder joints.<\/li>\n\n\n\n<li><strong>Check for short circuit<\/strong><br>Use a multimeter in resistance or continuity mode. A very low resistance reading may indicate a short, but in-circuit results can be affected by the rest of the circuit.<\/li>\n\n\n\n<li><strong>Measure capacitance<\/strong><br>Use a multimeter with capacitance mode or an LCR meter. For better accuracy, remove the capacitor or lift one side.<\/li>\n\n\n\n<li><strong>Check ESR if needed<\/strong><br>ESR is important for electrolytic, polymer, and power-related capacitors.<\/li>\n\n\n\n<li><strong>Isolate the suspected capacitor<\/strong><br>If many capacitors are connected to the same power rail, one shorted capacitor can make all of them appear shorted. Removing or isolating the suspected part gives a more reliable result.<\/li>\n<\/ul>\n\n\n\n<p>For unknown parts, check the schematic, BOM, reference designator, or a known-good board before replacement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"SMD_Capacitor_vs_Through-Hole_Capacitor_What_Is_the_Difference\"><\/span>SMD Capacitor vs Through-Hole Capacitor: What Is the Difference?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>SMD capacitors and through-hole capacitors perform the same basic electrical function, but they differ in mounting method, size, assembly process, PCB density, and repairability.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Item<\/th><th class=\"has-text-align-center\" data-align=\"center\">SMD Capacitor<\/th><th class=\"has-text-align-center\" data-align=\"center\">Through-Hole Capacitor<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Mounting<\/td><td class=\"has-text-align-center\" data-align=\"center\">Soldered on PCB surface<\/td><td class=\"has-text-align-center\" data-align=\"center\">Leads pass through PCB holes<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Size<\/td><td class=\"has-text-align-center\" data-align=\"center\">Smaller<\/td><td class=\"has-text-align-center\" data-align=\"center\">Larger<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">PCB density<\/td><td class=\"has-text-align-center\" data-align=\"center\">Higher<\/td><td class=\"has-text-align-center\" data-align=\"center\">Lower<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Assembly<\/td><td class=\"has-text-align-center\" data-align=\"center\">SMT reflow process<\/td><td class=\"has-text-align-center\" data-align=\"center\">Wave, selective, or hand soldering<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Automation<\/td><td class=\"has-text-align-center\" data-align=\"center\">Excellent<\/td><td class=\"has-text-align-center\" data-align=\"center\">Slower for mass production<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Repair<\/td><td class=\"has-text-align-center\" data-align=\"center\">Harder for tiny packages<\/td><td class=\"has-text-align-center\" data-align=\"center\">Easier for manual repair<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Mechanical strength<\/td><td class=\"has-text-align-center\" data-align=\"center\">Good for small parts<\/td><td class=\"has-text-align-center\" data-align=\"center\">Stronger for large components<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Common use<\/td><td class=\"has-text-align-center\" data-align=\"center\">Compact electronics and mass production PCBA<\/td><td class=\"has-text-align-center\" data-align=\"center\">Power parts, prototypes, repairable boards<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>SMD capacitors are preferred in compact and high-volume electronics because they save space and support automated placement. Through-hole capacitors are still useful for large capacitance, stronger mechanical support, prototypes, repairable devices, and some power applications.<\/p>\n\n\n\n<p>Many PCB assemblies use both. Small ceramic capacitors may be SMD, while larger electrolytic capacitors or mechanically stressed parts may use through-hole packages.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs_About_SMD_Capacitor\"><\/span>FAQs About SMD Capacitor<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>What Is an SMD Capacitor?<\/strong><\/p>\n\n\n\n<p>An SMD capacitor is a surface-mount capacitor soldered directly onto PCB pads. It is commonly used for decoupling, filtering, coupling, bypassing, and power stabilization.<\/p>\n\n\n\n<p><strong>What Does SMD Mean on a Capacitor?<\/strong><\/p>\n\n\n\n<p>SMD means Surface Mount Device. It describes the mounting style, not the capacitance value, voltage rating, or capacitor type.<\/p>\n\n\n\n<p><strong>Are All SMD Capacitors Ceramic?<\/strong><\/p>\n\n\n\n<p>No. Many SMD capacitors are ceramic MLCCs, but SMD capacitors can also be tantalum, aluminum electrolytic, polymer, film, or specialty capacitors.<\/p>\n\n\n\n<p><strong>Do SMD Capacitors Have Polarity?<\/strong><\/p>\n\n\n\n<p>Some do and some do not. Ceramic SMD capacitors are usually non-polarized. Tantalum, aluminum electrolytic, and many polymer SMD capacitors are polarized.<\/p>\n\n\n\n<p><strong>How Can I Identify an SMD Capacitor Value?<\/strong><\/p>\n\n\n\n<p>Check the BOM, schematic, reel label, datasheet, or component marking. For small MLCCs, there may be no printed marking, so measurement or design files may be needed.<\/p>\n\n\n\n<p><strong>What Is a 104 SMD Capacitor Value?<\/strong><\/p>\n\n\n\n<p>A 104 SMD capacitor is usually 100 nF, also written as 0.1 \u00b5F, if it uses the standard three-digit capacitor code.<\/p>\n\n\n\n<p><strong>What Is a 105 SMD Capacitor Value?<\/strong><\/p>\n\n\n\n<p>A 105 SMD capacitor is usually 1 \u00b5F, also written as 1,000 nF, under the standard three-digit capacitor code.<\/p>\n\n\n\n<p><strong>What Is a 106 SMD Capacitor Value?<\/strong><\/p>\n\n\n\n<p>A 106 SMD capacitor is usually 10 \u00b5F, also written as 10,000 nF, under the standard three-digit capacitor code.<\/p>\n\n\n\n<p><strong>What Are Common SMD Capacitor Sizes?<\/strong><\/p>\n\n\n\n<p>Common SMD capacitor sizes include 0201, 0402, 0603, 0805, 1206, 1210, 1812, and 2220.<\/p>\n\n\n\n<p><strong>What Is the Difference Between SMD Capacitor Package and Footprint?<\/strong><\/p>\n\n\n\n<p>The package is the physical size of the capacitor. The footprint is the PCB solder pad pattern used to mount it. Both must match for reliable soldering.<\/p>\n\n\n\n<p><strong>Can I Replace an SMD Capacitor With a Larger Package?<\/strong><\/p>\n\n\n\n<p>Sometimes, if the PCB footprint allows it and the electrical specifications match. However, the part must fit the pad layout and assembly process.<\/p>\n\n\n\n<p><strong>Can I Use a Higher Voltage SMD Capacitor?<\/strong><\/p>\n\n\n\n<p>Usually yes, if the capacitance, dielectric, package, footprint, and circuit requirement are suitable. A higher voltage rating can provide better margin, but size and cost may increase.<\/p>\n\n\n\n<p><strong>How Do I Know if an SMD Capacitor Is Bad?<\/strong><\/p>\n\n\n\n<p>Check for cracks, burns, leakage, shorts, low capacitance, high ESR, or circuit symptoms. An LCR meter gives better results than a basic multimeter.<\/p>\n\n\n\n<p><strong>Can a Shorted SMD Capacitor Be Tested In-Circuit?<\/strong><\/p>\n\n\n\n<p>It can be suspected in-circuit, but not always confirmed. Other components may be connected in parallel. Removing the capacitor or lifting one side gives a more reliable result.<\/p>\n\n\n\n<p>Overall, SMD capacitor selection is not only about choosing a capacitance value. A reliable choice should consider package size, footprint, code, dielectric type, voltage rating, polarity, DC bias, ESR, temperature range, assembly process, and actual circuit function.<\/p>\n\n\n\n<p>For simple circuits, a standard MLCC may be enough. For power rails, automotive electronics, <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/06\/industrial-control-pcb\/\" title=\"\">industrial control PCBs<\/a>, compact PCBA projects, or high-reliability products, the capacitor package and real operating conditions become more important.<\/p>\n\n\n\n<p>If you need <a href=\"https:\/\/www.bestpcbs.com\/blog\/2025\/05\/smt-pcb-assembly-process-smt-board-assembly-no-moq\/\" title=\"\">SMT board assembly<\/a>, BOM review, SMD capacitor selection support, or DFM checking for your PCBA project, pls feel free to send your Gerber files, BOM, stack-up, and project requirements to EBest Circuit (Best Technology) at <strong>sales@bestpcbs.com<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An SMD capacitor is a surface-mount capacitor soldered directly onto PCB pads. It is widely used in modern PCB assembly because it saves space, supports automated SMT production, and works well in compact electronic circuits. However, choosing or replacing an SMD capacitor is not always as simple as matching one number. You may need to [&hellip;]<\/p>\n","protected":false},"author":33085,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[175,174,5341],"tags":[6259,6257,6260,6258],"class_list":["post-28124","post","type-post","status-publish","format-standard","hentry","category-best-pcb","category-bestpcb","category-electrical-components","tag-capacitor-smd","tag-smd-capacitor","tag-smd-capacitor-size-chart","tag-smd-capacitors"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/28124","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/users\/33085"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/comments?post=28124"}],"version-history":[{"count":7,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/28124\/revisions"}],"predecessor-version":[{"id":28153,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/28124\/revisions\/28153"}],"wp:attachment":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media?parent=28124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/categories?post=28124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/tags?post=28124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}