{"id":24038,"date":"2026-04-17T18:01:26","date_gmt":"2026-04-17T10:01:26","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/?p=24038"},"modified":"2026-04-17T18:03:55","modified_gmt":"2026-04-17T10:03:55","slug":"through-hole-resistor","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/","title":{"rendered":"What Is a Through Hole Resistor &amp; How to Read &amp; Mount Them Properly?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 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\/04\/through-hole-resistor\/#What_Is_a_Through_Hole_Resistor\" >What Is a Through Hole Resistor?<\/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\/04\/through-hole-resistor\/#What_Material_Is_a_Through_Hole_Resistor_Made_Of\" >What Material Is a Through Hole Resistor Made Of?<\/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\/04\/through-hole-resistor\/#What_Size_Are_Standard_Through_Hole_Resistors\" >What Size Are Standard Through Hole Resistors?<\/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\/04\/through-hole-resistor\/#What_Is_the_Color_Code_of_Through_Hole_Resistor\" >What Is the Color Code of Through Hole Resistor?<\/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\/04\/through-hole-resistor\/#What_Is_the_Tolerance_of_Through_Hole_Resistor\" >What Is the Tolerance of Through Hole Resistor?<\/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\/04\/through-hole-resistor\/#How_Much_Resistance_Is_in_a_Standard_Through_Hole_Resistor\" >How Much Resistance Is in a Standard Through Hole Resistor?<\/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\/04\/through-hole-resistor\/#How_to_Read_Through_Hole_Resistors\" >How to Read Through Hole Resistors?<\/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\/04\/through-hole-resistor\/#How_to_Tell_the_Wattage_of_a_Through_Hole_Resistor\" >How to Tell the Wattage of a Through Hole Resistor?<\/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\/04\/through-hole-resistor\/#What_Mounting_Options_for_Through_Hole_Resistors\" >What Mounting Options for Through Hole Resistors?<\/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\/04\/through-hole-resistor\/#How_to_Mount_Through_Hole_Resistors\" >How to Mount Through Hole Resistors?<\/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\/04\/through-hole-resistor\/#How_to_Organize_Through_Hole_Resistors\" >How to Organize Through Hole Resistors?<\/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\/04\/through-hole-resistor\/#What_Is_the_Difference_Between_SMD_and_Through_Hole_Resistors\" >What Is the Difference Between SMD and Through Hole Resistors?<\/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\/04\/through-hole-resistor\/#Through_Hole_Resistor_Datasheet_Overview\" >Through Hole Resistor Datasheet Overview<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/#FAQs_About_Through-Hole_Resistor\" >FAQs About Through-Hole Resistor<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div>\n<p>Are you struggling to identify a <strong><a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/\" title=\"\">through hole resistor<\/a><\/strong>, read its color code accurately, or mount it correctly without damaging the component or your circuit? Many electronics projects fail not because of faulty design but because of misunderstanding how through hole resistors work, their specifications, or proper handling. This guide breaks down everything needed to master through hole resistors, from their basic definition to advanced mounting techniques, ensuring every project benefits from reliable, accurate resistor performance.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistor.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"632\" height=\"355\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistor.jpg\" alt=\"Through Hole Resistor, https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/\" class=\"wp-image-24042\" style=\"aspect-ratio:3\/2;object-fit:contain;width:839px\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistor.jpg 632w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistor-300x169.jpg 300w\" sizes=\"auto, (max-width: 632px) 100vw, 632px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_a_Through_Hole_Resistor\"><\/span>What Is a Through Hole Resistor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>A<a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/\" title=\"\"> through hole resistor <\/a>is a passive electronic component designed to limit electric current flow in a circuit. It features two metal leads that pass through holes in a printed circuit board (PCB), allowing for secure mounting and soldering to the board\u2019s opposite side.<\/strong> Unlike surface mount alternatives, through hole resistors are known for their durability, ease of handling, and compatibility with traditional PCB assembly methods. They are used in a wide range of applications, from simple hobby projects to industrial equipment, where stability and mechanical strength are critical.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Material_Is_a_Through_Hole_Resistor_Made_Of\"><\/span>What Material Is a Through Hole Resistor Made Of?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Most <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/\" title=\"\">through hole resistors <\/a>use either carbon film, metal film, or wirewound materials for their resistive element.<\/strong> Carbon film resistors are the most common and cost effective, made by depositing a thin carbon layer on a ceramic core. Metal film resistors offer higher precision and stability, using a thin metal layer (often nickel-chromium) for better temperature resistance. Wirewound resistors use a metal wire wrapped around a ceramic core, ideal for high power applications and precise resistance values.<\/p>\n\n\n\n<p>The leads of a through hole resistor are typically made of tinned copper, which ensures good solderability and conductivity. The outer body is usually a ceramic or plastic coating that protects the resistive element and displays the color code for easy identification.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Size_Are_Standard_Through_Hole_Resistors\"><\/span>What Size Are Standard Through Hole Resistors?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Standard <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/\" title=\"\">through hole resistors<\/a> follow a consistent size format based on their power rating, with the most common size being the 1\/4 watt (0.25W) resistor.<\/strong> This size measures approximately 6.3mm in length and 2.5mm in diameter, with lead spacing (pitch) of 2.54mm (0.1 inches), the standard for most PCBs. Larger power ratings correspond to larger sizes: 1\/2 watt (0.5W) resistors are around 8mm long and 3mm in diameter, while 1 watt resistors are 10mm long and 4mm in diameter.<\/p>\n\n\n\n<p>Other common sizes include 1\/8 watt (0.125W) for small, low-power circuits and 2 watt or larger for high-power applications. Lead length varies but is typically 20-25mm, which can be trimmed to fit specific PCB layouts.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_the_Color_Code_of_Through_Hole_Resistor\"><\/span>What Is the Color Code of Through Hole Resistor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>The color code of a through hole resistor is a series of colored bands painted on its body, used to indicate its resistance value and tolerance.<\/strong> Most through hole resistors have four or five color bands. Four-band resistors are the most common, while five-band resistors offer higher precision.<\/p>\n\n\n\n<p>For four-band resistors: the first two bands represent the significant digits, the third band is the multiplier (10^n), and the fourth band is the tolerance. For five-band resistors: the first three bands are significant digits, the fourth is the multiplier, and the fifth is tolerance. Common color codes include black (0), brown (1), red (2), orange (3), yellow (4), green (5), blue (6), violet (7), gray (8), white (9), gold (5% tolerance, 0.1 multiplier), and silver (10% tolerance, 0.01 multiplier).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_the_Tolerance_of_Through_Hole_Resistor\"><\/span>What Is the Tolerance of Through Hole Resistor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Tolerance of a <a href=\"https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/\" title=\"\">through hole resistor<\/a> refers to the allowable deviation from its stated resistance value, expressed as a percentage.<\/strong> It indicates how accurate the resistor\u2019s actual resistance is compared to the value marked by its color code. Common tolerance ratings for through hole resistors are 5%, 10%, and 1%, with higher precision resistors offering 0.5% or lower tolerance.<\/p>\n\n\n\n<p>Carbon film through hole resistors typically have 5% or 10% tolerance, while metal film resistors often have 1% or 2% tolerance. Wirewound resistors can offer tolerances as low as 0.1% for high-precision applications. Choosing the right tolerance depends on the circuit\u2019s requirements\u2014general purpose circuits may use 5% tolerance, while precision circuits (like measurement equipment) need lower tolerance.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistors.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistors.jpg\" alt=\"Through Hole Resistors, https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/\" class=\"wp-image-24047\" style=\"aspect-ratio:1.5;object-fit:cover;width:850px\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistors.jpg 500w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistors-300x300.jpg 300w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistors-150x150.jpg 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Much_Resistance_Is_in_a_Standard_Through_Hole_Resistor\"><\/span>How Much Resistance Is in a Standard Through Hole Resistor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Standard through hole resistors come in a wide range of resistance values, from 1 ohm (\u03a9) to 1 megaohm (M\u03a9) or higher, following the E-series of standard values.<\/strong> The E-series (E12, E24, E96) are standardized sets of resistance values designed to cover the entire range with consistent spacing, ensuring compatibility across manufacturers.<\/p>\n\n\n\n<p>The most common series for general purpose through hole resistors is E12, which includes values like 10\u03a9, 22\u03a9, 47\u03a9, 100\u03a9, 220\u03a9, 470\u03a9, 1k\u03a9, 2.2k\u03a9, 4.7k\u03a9, 10k\u03a9, 22k\u03a9, 47k\u03a9, and 100k\u03a9. E24 series offers more precise values (e.g., 11\u03a9, 24\u03a9, 49\u03a9) for applications that require tighter tolerance, while E96 is used for high-precision through hole resistors.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Read_Through_Hole_Resistors\"><\/span>How to Read Through Hole Resistors?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Reading a through hole resistor is done by interpreting its color bands, following a simple step-by-step process.<\/strong> Start by identifying the tolerance band (usually gold or silver, located at one end of the resistor). The band closest to the opposite end is the first significant digit.<\/p>\n\n\n\n<p><strong>For four-band through hole resistors:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>First band:<\/strong> First significant digit<\/li>\n\n\n\n<li><strong>Second band: <\/strong>Second significant digit<\/li>\n\n\n\n<li><strong>Third band:<\/strong> Multiplier (10 raised to the band\u2019s value)<\/li>\n\n\n\n<li><strong>Fourth band:<\/strong> Tolerance<\/li>\n<\/ul>\n\n\n\n<p><strong>For five-band through hole resistors:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>First band: <\/strong>First significant digit<\/li>\n\n\n\n<li><strong>Second band:<\/strong> Second significant digit<\/li>\n\n\n\n<li><strong>Third band: <\/strong>Third significant digit<\/li>\n\n\n\n<li><strong>Fourth band:<\/strong> Multiplier<\/li>\n\n\n\n<li><strong>Fifth band: <\/strong>Tolerance<\/li>\n<\/ul>\n\n\n\n<p><strong>Example: <\/strong>A four-band through hole resistor with bands brown, black, red, gold has a resistance of 1000\u03a9 (1k\u03a9) with 5% tolerance (brown=1, black=0, red=10\u00b2=100, 1*10*100=1000\u03a9).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Tell_the_Wattage_of_a_Through_Hole_Resistor\"><\/span>How to Tell the Wattage of a Through Hole Resistor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>The wattage of a through hole resistor is determined by its physical size\u2014larger resistors can handle more power.<\/strong> Unlike resistance, wattage is not marked on the resistor\u2019s body, so size is the primary indicator. Standard wattage ratings and corresponding sizes are consistent across manufacturers.<\/p>\n\n\n\n<p><strong>Key size-to-wattage guidelines for through hole resistors:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>1\/8 watt (0.125W):<\/strong> ~3mm diameter, ~4mm length<\/li>\n\n\n\n<li><strong>1\/4 watt (0.25W):<\/strong> ~2.5mm diameter, ~6.3mm length (most common)<\/li>\n\n\n\n<li><strong>1\/2 watt (0.5W):<\/strong> ~3mm diameter, ~8mm length<\/li>\n\n\n\n<li><strong>1 watt (1W):<\/strong> ~4mm diameter, ~10mm length<\/li>\n\n\n\n<li><strong>2 watts (2W): <\/strong>~5mm diameter, ~12mm length<\/li>\n<\/ul>\n\n\n\n<p>For higher wattage through hole resistors (5W or more), the wattage is often printed directly on the resistor\u2019s body, as their size is significantly larger and color coding is less practical.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Mounting_Options_for_Through_Hole_Resistors\"><\/span>What Mounting Options for Through Hole Resistors?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Through hole resistors have three main mounting options, each suited to different PCB designs and application needs.<\/strong> The choice depends on factors like space constraints, mechanical stability, and assembly method.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Vertical Mounting: <\/strong>The through hole resistor is placed upright, with leads inserted through PCB holes and soldered to the bottom. This saves horizontal space, making it ideal for dense PCBs. It is the most common mounting option for general purpose circuits.<\/li>\n\n\n\n<li><strong>Horizontal Mounting: <\/strong>The through hole resistor is laid flat against the PCB, with leads bent to fit through holes. This provides better mechanical stability, as the resistor is less likely to be damaged by vibration. It is often used in high-vibration environments.<\/li>\n\n\n\n<li><strong>Stand-Off Mounting: <\/strong>The through hole resistor is mounted above the PCB surface using spacers or stand-offs. This allows for better heat dissipation, which is critical for high-power through hole resistors that generate significant heat during operation.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Mount_Through_Hole_Resistors\"><\/span>How to Mount Through Hole Resistors?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Mounting a through-hole resistor correctly ensures a secure connection and optimal performance. Follow these steps for proper mounting and soldering.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Prepare the PCB: <\/strong>Ensure the PCB holes are the correct size (typically 0.8-1mm) for the through hole resistor\u2019s leads. Clean the PCB surface to remove any dirt or oxidation that could affect soldering.<\/li>\n\n\n\n<li><strong>Trim the Leads:<\/strong> Cut the through hole resistor\u2019s leads to the appropriate length (usually 6-8mm from the resistor body). Avoid cutting too short, as this may make soldering difficult, or too long, which wastes space.<\/li>\n\n\n\n<li><strong>Insert the Resistor: <\/strong>Insert the leads through the PCB holes from the top (component side) to the bottom (solder side). Position the resistor according to the mounting option (vertical, horizontal, or stand-off).<\/li>\n\n\n\n<li><strong>Solder the Leads: <\/strong>Use a soldering iron (300-350\u00b0C) to apply solder to the lead and PCB pad. Ensure the solder forms a smooth, shiny joint that covers the pad and lead. Avoid over-soldering, which can cause short circuits, or under-soldering, which leads to poor connections.<\/li>\n\n\n\n<li><strong>Inspect the Joint: <\/strong>Check the solder joint for cracks, cold solder (dull, grainy appearance), or bridging (solder connecting adjacent pads). Touch up any faulty joints with additional solder.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Organize_Through_Hole_Resistors\"><\/span>How to Organize Through Hole Resistors?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Organizing through hole resistors prevents loss, saves time during assembly, and ensures easy access to the correct value. Effective organization methods focus on sorting by resistance value, wattage, or tolerance.<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Resistor Storage Boxes: <\/strong>Use plastic storage boxes with divided compartments, labeled by resistance value (e.g., 10\u03a9-99\u03a9, 100\u03a9-999\u03a9, 1k\u03a9-9.9k\u03a9). Many boxes include pre-printed labels for standard E-series values.<\/li>\n\n\n\n<li><strong>Color-Coded Trays: <\/strong>Trays with color-coded sections corresponding to the first two color bands of through hole resistors make it easy to quickly locate specific values without reading the entire color code.<\/li>\n\n\n\n<li><strong>Labeled Bags: <\/strong>For small quantities, store through hole resistors in zip-top bags labeled with resistance value, wattage, and tolerance. This is ideal for project-specific components.<\/li>\n\n\n\n<li><strong>Drawer Units:<\/strong> Stackable drawer units with individual drawers for each resistance range or wattage allow for organized storage of large quantities of through hole resistors, common in workbenches or production settings.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistor-2.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"334\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistor-2.jpg\" alt=\"Through Hole Resistor, https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/\" class=\"wp-image-24050\" style=\"aspect-ratio:3\/2;object-fit:contain;width:840px\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistor-2.jpg 500w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/Through-Hole-Resistor-2-300x200.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_the_Difference_Between_SMD_and_Through_Hole_Resistors\"><\/span>What Is the Difference Between SMD and Through Hole Resistors?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>SMD (Surface Mount Device) and through-hole resistors differ in mounting method, size, performance, and application. Understanding these differences helps choose the right component for each circuit.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><strong>Feature<\/strong><\/th><th><strong>Through Hole Resistor<\/strong><\/th><th><strong>SMD Resistor<\/strong><\/th><\/tr><\/thead><tbody><tr><td><strong>Mounting Method<\/strong><\/td><td>Leads pass through PCB holes and are soldered to the bottom<\/td><td>Mounted directly on the PCB surface, soldered to pads<\/td><\/tr><tr><td><strong>Size<\/strong><\/td><td>Larger, with visible leads; varies by wattage<\/td><td>Smaller, no leads; compact (e.g., 0402, 0603 sizes)<\/td><\/tr><tr><td><strong>Mechanical Strength<\/strong><\/td><td>Higher, more resistant to vibration and physical damage<\/td><td>Lower, more prone to damage from handling or vibration<\/td><\/tr><tr><td><strong>Assembly<\/strong><\/td><td>Can be hand-soldered easily; suitable for prototyping<\/td><td>Requires reflow soldering; better for mass production<\/td><\/tr><tr><td><strong>Heat Dissipation<\/strong><\/td><td>Better for high-power applications; larger surface area<\/td><td>Limited heat dissipation; best for low-power circuits<\/td><\/tr><tr><td><strong>Cost<\/strong><\/td><td>Lower for small quantities; higher for mass production<\/td><td>Lower for mass production; higher for small quantities<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/SMD-and-Through-Hole-Resistors.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"879\" height=\"400\" src=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/SMD-and-Through-Hole-Resistors.jpg\" alt=\"SMD and Through Hole Resistors, https:\/\/www.bestpcbs.com\/blog\/2026\/04\/through-hole-resistor\/\" class=\"wp-image-24044\" srcset=\"https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/SMD-and-Through-Hole-Resistors.jpg 879w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/SMD-and-Through-Hole-Resistors-300x137.jpg 300w, https:\/\/www.bestpcbs.com\/blog\/wp-content\/uploads\/2026\/04\/SMD-and-Through-Hole-Resistors-768x349.jpg 768w\" sizes=\"auto, (max-width: 879px) 100vw, 879px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Through_Hole_Resistor_Datasheet_Overview\"><\/span>Through Hole Resistor Datasheet Overview<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>A through-hole resistor datasheet is a technical document provided by manufacturers, containing all critical specifications needed to select and use the component correctly.<\/strong> Datasheets ensure compatibility with circuit requirements and help avoid component failure.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter Category<\/th><th>Example Value<\/th><\/tr><\/thead><tbody><tr><td>Resistance Value<\/td><td>470 \u03a9 \u00b1 1% (at 25\u00b0C, with min value of 465.3 \u03a9 and max value of 474.7 \u03a9 at this temperature)<\/td><\/tr><tr><td>Power Rating<\/td><td>0.5 W (can dissipate this power continuously at 25\u00b0C ambient without overheating)<\/td><\/tr><tr><td>Temperature Coefficient<\/td><td>\u00b1 50 ppm\/\u00b0C (over the temperature range of &#8211; 40\u00b0C to + 85\u00b0C, indicating a relatively stable resistance change with temperature)<\/td><\/tr><tr><td>Voltage Rating<\/td><td>300 V (the maximum voltage the resistor can withstand without electrical breakdown)<\/td><\/tr><tr><td>Physical Dimensions<\/td><td>3.2 mm (length) \u00d7 1.6 mm (width) \u00d7 0.8 mm (height) (for a 1206 &#8211; sized surface &#8211; mount resistor)<\/td><\/tr><tr><td>Solderability<\/td><td>245\u00b0C \u00b1 3\u00b0C for 4 \u00b1 0.5 seconds (recommended soldering temperature and time to ensure proper solder joint without damaging the resistor)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQs_About_Through-Hole_Resistor\"><\/span>FAQs About Through-Hole Resistor<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p><strong>Q1: How to get through hole resistor on terminal board?<\/strong><\/p>\n\n\n\n<p><strong>A1: To mount a through hole resistor on a terminal board, first insert the resistor\u2019s leads into the desired terminal slots. Tighten the terminal screws to secure the leads, ensuring a firm connection (avoid over-tightening, which can damage the leads). <\/strong>Trim any excess lead length to prevent short circuits. For better conductivity, strip a small portion of insulation from the leads (if applicable) before inserting them into the terminal board. Test the connection with a multimeter to ensure continuity.<\/p>\n\n\n\n<p><strong>Q2: Are through hole resistors directional?<\/strong><\/p>\n\n\n\n<p><strong>A2: No, through-hole resistors are not directional. They do not have a positive or negative terminal, and can be inserted into the PCB or terminal board in either direction.<\/strong> The resistance value remains the same regardless of the direction of current flow. This makes mounting through hole resistors simpler, as there is no need to worry about polarity or orientation.<\/p>\n\n\n\n<p><strong>Q3: Do through hole resistors have polarity?<\/strong><\/p>\n\n\n\n<p><strong>A3: No, through-hole resistors do not have polarity. <\/strong>Unlike diodes or capacitors, they do not have a positive or negative side, and current can flow through them in either direction without affecting their performance. The color code on the through hole resistor\u2019s body indicates resistance and tolerance, not polarity.<\/p>\n\n\n\n<p><strong>Q4: What is a through hole resistor footprint?<\/strong><\/p>\n\n\n\n<p><strong>A4: A through hole resistor footprint is the pattern of pads and holes on a PCB designed to fit the resistor\u2019s leads. <\/strong>The standard footprint for through hole resistors uses two pads with holes spaced 2.54mm (0.1 inches) apart, matching the lead pitch of most standard through hole resistors. The pad size varies by resistor wattage\u2014larger wattage through hole resistors require larger pads to handle heat and provide better solder joints. Footprints are often included in PCB design software libraries for easy integration.<\/p>\n\n\n\n<p><strong>Q5: How to store through hole resistors?<\/strong><\/p>\n\n\n\n<p><strong>A5:<\/strong> <strong>Store through hole resistors in a cool, dry environment (temperature 15-25\u00b0C, humidity below 60%) to prevent oxidation of the leads. <\/strong>Keep them away from direct sunlight, moisture, and chemicals. Use labeled storage containers (boxes, trays, or bags) to sort through hole resistors by resistance value, wattage, or tolerance. Avoid bending or damaging the leads during storage, and ensure containers are sealed to prevent dust accumulation. For long-term storage, wrap through hole resistors in anti-static packaging to protect against electrostatic discharge.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Are you struggling to identify a through hole resistor, read its color code accurately, or mount it correctly without damaging the component or your circuit? Many electronics projects fail not because of faulty design but because of misunderstanding how through hole resistors work, their specifications, or proper handling. This guide breaks down everything needed to [&hellip;]<\/p>\n","protected":false},"author":33247,"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":[175,174,37],"tags":[5323,5325,5326,5324],"class_list":["post-24038","post","type-post","status-publish","format-standard","hentry","category-best-pcb","category-bestpcb","category-faq","tag-through-hole-resistor","tag-through-hole-resistor-color-code","tag-through-hole-resistor-datasheet","tag-through-hole-resistor-tolerance"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/24038","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\/33247"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/comments?post=24038"}],"version-history":[{"count":9,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/24038\/revisions"}],"predecessor-version":[{"id":24054,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/24038\/revisions\/24054"}],"wp:attachment":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media?parent=24038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/categories?post=24038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/tags?post=24038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}