{"id":21642,"date":"2026-03-18T14:41:10","date_gmt":"2026-03-18T06:41:10","guid":{"rendered":"https:\/\/www.bestpcbs.com\/blog\/?p=21642"},"modified":"2026-03-18T14:41:12","modified_gmt":"2026-03-18T06:41:12","slug":"certificated-through-hole-assembly","status":"publish","type":"post","link":"https:\/\/www.bestpcbs.com\/smt\/certificated-through-hole-assembly\/","title":{"rendered":"Through-Hole Assembly"},"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\/smt\/certificated-through-hole-assembly\/#What_Is_Through-Hole_Assembly_and_Why_Is_It_Still_Essential\" >What Is Through-Hole Assembly and Why Is It Still Essential?<\/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\/smt\/certificated-through-hole-assembly\/#What_Are_the_Advantages_of_Through-Hole_PCB_Assembly\" >What Are the Advantages of Through-Hole PCB Assembly?<\/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\/smt\/certificated-through-hole-assembly\/#What_Types_of_Through-Hole_Assembly_Services_Do_We_Offer\" >What Types of Through-Hole Assembly Services Do We Offer?<\/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\/smt\/certificated-through-hole-assembly\/#Through_Hole_Assembly_Process_%E2%80%93_Step-by-Step_Overview\" >Through Hole Assembly Process \u2013 Step-by-Step Overview<\/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\/smt\/certificated-through-hole-assembly\/#What_Equipment_Is_Used_in_Through-Hole_PCB_Assembly\" >What Equipment Is Used in Through-Hole PCB Assembly?<\/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\/smt\/certificated-through-hole-assembly\/#Automated_Through_Hole_Assembly_vs_Manual_Assembly_%E2%80%93_Which_to_Choose\" >Automated Through Hole Assembly vs Manual Assembly \u2013 Which to Choose?<\/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\/smt\/certificated-through-hole-assembly\/#When_Should_You_Choose_Through-Hole_PCB_Assembly_Instead_of_SMT\" >When Should You Choose Through-Hole PCB Assembly Instead of SMT?<\/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\/smt\/certificated-through-hole-assembly\/#Why_Choose_EBest_Circuit_for_Through_Hole_PCB_Assembly_Service\" >Why Choose EBest Circuit for Through Hole PCB Assembly Service?<\/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\/smt\/certificated-through-hole-assembly\/#Which_Industries_Use_Through-Hole_Assembly_the_Most\" >Which Industries Use Through-Hole Assembly the Most?<\/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\/smt\/certificated-through-hole-assembly\/#Common_Challenges_in_Through_Hole_PCB_Assembly_and_How_to_Solve_Them\" >Common Challenges in Through Hole PCB Assembly and How to Solve Them<\/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\/smt\/certificated-through-hole-assembly\/#FAQ_About_Through-Hole_Assembly\" >FAQ About Through-Hole Assembly<\/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\/smt\/certificated-through-hole-assembly\/#Ready_to_Start_Your_Through-Hole_PCB_Assembly_Project\" >Ready to Start Your Through-Hole PCB Assembly Project?<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"yzp-no-index\"><\/div>\n<p><strong>Through-Hole Assembly<\/strong> remains a critical manufacturing method for electronics that demand strong mechanical connections and long-term reliability. In this guide, you will learn how through hole pcb assembly works, when to use it, and how to choose the right through hole pcb assembly service for your project.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_Through-Hole_Assembly_and_Why_Is_It_Still_Essential\"><\/span>What Is Through-Hole Assembly and Why Is It Still Essential?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Through-hole assembly refers to inserting component leads into drilled holes on a PCB and soldering them on the opposite side, which creates a strong and stable mechanical bond. Compared with surface mount technology, this method offers better durability, especially in applications exposed to vibration, heat, or high electrical load.<\/p>\n\n\n\n<p>Although SMT dominates consumer electronics, through-hole pcb assembly is still widely used in industrial, aerospace, and automotive sectors. The reason is simple: reliability matters more than size in these environments, and through-hole connections are much harder to fail under stress.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_the_Advantages_of_Through-Hole_PCB_Assembly\"><\/span>What Are the Advantages of Through-Hole PCB Assembly?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Through hole assembly services continue to be preferred in many industries, because they offer several practical advantages that SMT alone cannot fully replace.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Strong mechanical bonding for heavy or large components<\/li>\n\n\n\n<li>Better resistance to vibration and thermal cycling<\/li>\n\n\n\n<li>Higher reliability in high-current and high-voltage circuits<\/li>\n\n\n\n<li>Easier inspection, repair, and rework<\/li>\n\n\n\n<li>Suitable for connectors, transformers, and power components<\/li>\n<\/ul>\n\n\n\n<p>Because of these benefits, many designs still combine SMT and through hole pcb assembly to achieve both compact size and strong reliability.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Types_of_Through-Hole_Assembly_Services_Do_We_Offer\"><\/span>What Types of Through-Hole Assembly Services Do We Offer?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A professional through hole pcb assembly service should cover different production needs, from low-volume prototypes to large-scale manufacturing. At EBest Circuit, we provide flexible and scalable solutions to match different project requirements.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Manual through hole assembly for complex or low-volume boards<\/li>\n\n\n\n<li>Automated through hole assembly for high-volume production<\/li>\n\n\n\n<li>Mixed technology assembly (SMT + THT)<\/li>\n\n\n\n<li>Wave soldering and selective soldering<\/li>\n\n\n\n<li>Full turnkey service including PCB fabrication and component sourcing<\/li>\n<\/ul>\n\n\n\n<p>By integrating all processes into one workflow, we help reduce lead time and improve overall production efficiency.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Through_Hole_Assembly_Process_%E2%80%93_Step-by-Step_Overview\"><\/span>Through Hole Assembly Process \u2013 Step-by-Step Overview<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The through hole assembly process follows a structured workflow, and each stage must be controlled carefully to ensure consistent quality.<\/p>\n\n\n\n<p><strong>1. Component preparation and lead forming<\/strong>, ensuring proper fit for insertion<\/p>\n\n\n\n<p><strong>2. PCB drilling and plating<\/strong>, creating reliable conductive holes<\/p>\n\n\n\n<p><strong>3. Component insertion<\/strong>, either manually or using automated machines<\/p>\n\n\n\n<p><strong>4. Soldering<\/strong>, typically through wave soldering or selective soldering<\/p>\n\n\n\n<p><strong>5. Cleaning<\/strong>, removing flux residues when required<\/p>\n\n\n\n<p><strong>6. Inspection<\/strong>, including AOI, X-ray, and visual checks<\/p>\n\n\n\n<p><strong>7. Functional testing<\/strong>, verifying electrical performance<\/p>\n\n\n\n<p>Each step plays a role in ensuring that the final product meets both mechanical and electrical requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Equipment_Is_Used_in_Through-Hole_PCB_Assembly\"><\/span>What Equipment Is Used in Through-Hole PCB Assembly?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Modern through hole pcb assembly equipment helps improve efficiency and consistency, especially in large-scale production.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Automated insertion machines for axial and radial components<\/li>\n\n\n\n<li>Wave soldering systems for high-speed production<\/li>\n\n\n\n<li>Selective soldering machines for precision soldering<\/li>\n\n\n\n<li>AOI and X-ray systems for quality inspection<\/li>\n<\/ul>\n\n\n\n<p>With the right equipment, manufacturers can achieve both high yield and stable performance across batches.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Automated_Through_Hole_Assembly_vs_Manual_Assembly_%E2%80%93_Which_to_Choose\"><\/span>Automated Through Hole Assembly vs Manual Assembly \u2013 Which to Choose?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Choosing between automated through hole assembly and manual assembly depends on production volume and design complexity.<\/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\">Type<\/th><th class=\"has-text-align-center\" data-align=\"center\">Automated Through Hole Assembly<\/th><th class=\"has-text-align-center\" data-align=\"center\">Manual Through Hole Assembly<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Efficiency<\/td><td class=\"has-text-align-center\" data-align=\"center\">High<\/td><td class=\"has-text-align-center\" data-align=\"center\">Lower<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Cost<\/td><td class=\"has-text-align-center\" data-align=\"center\">Lower at scale<\/td><td class=\"has-text-align-center\" data-align=\"center\">Higher<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Flexibility<\/td><td class=\"has-text-align-center\" data-align=\"center\">Limited<\/td><td class=\"has-text-align-center\" data-align=\"center\">High<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Best for<\/td><td class=\"has-text-align-center\" data-align=\"center\">Mass production<\/td><td class=\"has-text-align-center\" data-align=\"center\">Prototypes and complex boards<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When_Should_You_Choose_Through-Hole_PCB_Assembly_Instead_of_SMT\"><\/span>When Should You Choose Through-Hole PCB Assembly Instead of SMT?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>While SMT is efficient for compact designs, there are situations where through hole pcb assembly is the better choice.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>When components require strong mechanical support<\/li>\n\n\n\n<li>When the circuit operates under high current or voltage<\/li>\n\n\n\n<li>When the product will face vibration or harsh environments<\/li>\n\n\n\n<li>When long-term reliability is more important than size<\/li>\n<\/ul>\n\n\n\n<p>Understanding these scenarios helps engineers make better design decisions early in the project.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Choose_EBest_Circuit_for_Through_Hole_PCB_Assembly_Service\"><\/span>Why Choose EBest Circuit for Through Hole PCB Assembly Service?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Selecting the right manufacturing partner is just as important as choosing the right technology. EBest Circuit offers a complete solution for through hole pcb assembly, backed by strong engineering and manufacturing capabilities.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Over 20 years of PCB and PCBA manufacturing experience<\/li>\n\n\n\n<li>One-stop service from PCB fabrication to final assembly<\/li>\n\n\n\n<li>Certified quality system including ISO9001, ISO13485, IATF16949, and AS9100D<\/li>\n\n\n\n<li>Advanced through hole pcb assembly equipment<\/li>\n\n\n\n<li>Fast turnaround from prototype to mass production<\/li>\n\n\n\n<li>Mixed assembly technology including THT, DIP, manual soldering, wire harness assembly<\/li>\n\n\n\n<li>No MOQ, 1 pc available for prototype<\/li>\n\n\n\n<li>1.5 weeks for small orders<\/li>\n\n\n\n<li>Offer expedited service for urgent projects<\/li>\n\n\n\n<li>Multiply PCB types, including MCPCB, high speed PCB, RF PCB, ceramic PCB, rigid flex pcb&#8230;<\/li>\n<\/ul>\n\n\n\n<p>With a focus on quality and customer support, EBest helps reduce risks and improve project success rates.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Which_Industries_Use_Through-Hole_Assembly_the_Most\"><\/span>Which Industries Use Through-Hole Assembly the Most?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Through hole pcb assembly remains essential in industries where durability and reliability are critical.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Industrial control systems<\/li>\n\n\n\n<li>Automotive electronics<\/li>\n\n\n\n<li>Aerospace and defense<\/li>\n\n\n\n<li>Power supply and energy systems<\/li>\n\n\n\n<li>Medical equipment<\/li>\n<\/ul>\n\n\n\n<p>As electronic systems become more complex, these industries continue to rely on through-hole technology for critical components.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Challenges_in_Through_Hole_PCB_Assembly_and_How_to_Solve_Them\"><\/span>Common Challenges in Through Hole PCB Assembly and How to Solve Them<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Like any manufacturing process, through hole assembly comes with challenges, but most of them can be addressed with the right approach.<\/p>\n\n\n\n<p><strong>Common challenges include:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Inconsistent solder joints<\/li>\n\n\n\n<li>Component misalignment<\/li>\n\n\n\n<li>High labor cost<\/li>\n\n\n\n<li>Difficulty in automation for complex designs<\/li>\n<\/ul>\n\n\n\n<p><strong>Effective solutions include:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Using selective soldering for precision control<\/li>\n\n\n\n<li>Optimizing PCB layout for easier insertion<\/li>\n\n\n\n<li>Combining SMT and THT technologies<\/li>\n\n\n\n<li>Working with experienced manufacturers<\/li>\n<\/ul>\n\n\n\n<p>By addressing these issues early, manufacturers can improve both yield and reliability.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQ_About_Through-Hole_Assembly\"><\/span>FAQ About Through-Hole Assembly<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">What is the difference between through hole pcb assembly and SMT?<\/h3>\n\n\n\n<p>Through hole assembly uses inserted leads, while SMT mounts components directly on the surface, resulting in different mechanical strength and application use.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is through hole assembly still used today?<\/h3>\n\n\n\n<p>Yes, it is still widely used in high-reliability applications such as aerospace, industrial systems, and power electronics.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Can through-hole and SMT be combined on one PCB?<\/h3>\n\n\n\n<p>Yes, many designs use a mixed assembly approach to balance performance and cost.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is automated through hole assembly?<\/h3>\n\n\n\n<p>It refers to using machines to insert components and improve efficiency in high-volume production.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ready_to_Start_Your_Through-Hole_PCB_Assembly_Project\"><\/span>Ready to Start Your Through-Hole PCB Assembly Project?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>If you are looking for a reliable <strong>through hole pcb assembly service<\/strong>, EBest Circuit is ready to support your project with strong engineering expertise and fast delivery.<\/p>\n\n\n\n<p>Feel free to contact us at <strong>sales@bestpcbs.com<\/strong> to discuss your requirements and get a quick quotation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Through-Hole Assembly remains a critical manufacturing method for electronics that demand strong mechanical connections and long-term reliability. In this guide, you will learn how through hole pcb assembly works, when to use it, and how to choose the right through hole pcb assembly service for your project. What Is Through-Hole Assembly and Why Is It [&hellip;]<\/p>\n","protected":false},"author":623,"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":[4661],"tags":[4764,4760,4762,4761,3199,4763],"class_list":["post-21642","post","type-post","status-publish","format-standard","hentry","category-smt","tag-automated-through-hole-assembly","tag-through-hole-assembly","tag-through-hole-assembly-services","tag-through-hole-pcb-assembly","tag-through-hole-pcb-assembly-service","tag-through-hole-pcb-assembly-2"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/21642","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\/623"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/comments?post=21642"}],"version-history":[{"count":5,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/21642\/revisions"}],"predecessor-version":[{"id":21680,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/posts\/21642\/revisions\/21680"}],"wp:attachment":[{"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/media?parent=21642"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/categories?post=21642"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bestpcbs.com\/blog\/wp-json\/wp\/v2\/tags?post=21642"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}