{"id":15434,"date":"2025-09-19T18:35:00","date_gmt":"2025-09-19T10:35:00","guid":{"rendered":"https:\/\/promax2.seo2.au\/?p=15434"},"modified":"2026-02-25T15:48:07","modified_gmt":"2026-02-25T07:48:07","slug":"tht-vs-smt","status":"publish","type":"post","link":"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/","title":{"rendered":"THT vs SMT | Which PCB Assembly Technology is Right for Your Project?"},"content":{"rendered":"<p dir=\"ltr\">When designing electronic devices, one of the biggest decisions you&#8217;ll face happens before a single component gets placed \u2014 choosing between <a href=\"\/es\/spring-loaded-pin\/through-hole-pogo-pin\/\">Through-Hole Technology<\/a> (THT) and <a href=\"\/es\/spring-loaded-pin\/smt-smd-pogo-pin\/\">Surface Mount Technology<\/a> (SMT). It&#8217;s like deciding between manual and automatic transmission \u2014 neither is universally &#8220;better,&#8221; but each shines in specific situations. Get this choice wrong, and you&#8217;re setting yourself up for headaches down the road.<\/p>\n<p dir=\"ltr\">The stakes are surprisingly high here. Pick the wrong assembly method, and you might end up with circuit boards that cost way more than necessary, production delays that wreck your timeline, or worst of all \u2014 devices that fail in customers&#8217; hands. This guide cuts through the technical jargon to help you make the right call for your specific needs, whether you&#8217;re working on a one-off prototype or planning mass production for your next big product launch.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"blog-image aligncenter wp-image-15437 size-full\" src=\"https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project.jpg\" alt=\"tht vs smt which pcb assembly technology is right for your project\" width=\"1500\" height=\"1000\" srcset=\"https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project.jpg 1500w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project-300x200.jpg 300w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project-1030x687.jpg 1030w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project-768x512.jpg 768w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project-510x340.jpg 510w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project.jpg?w=600 600w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project.jpg?w=900 900w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project.jpg?w=1200 1200w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-vs-smt-_-which-pcb-assembly-technology-is-right-for-your-project.jpg?w=450 450w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 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=\"Alternar tabla de contenidos\"><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:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Key_Takeaways\" >Key Takeaways<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#What_is_Through-Hole_Technology_THT\" >What is Through-Hole Technology (THT)?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#THT_Component_Types\" >THT Component Types<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#THT_Assembly_Process\" >THT Assembly Process<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#What_is_Surface_Mount_Technology_SMT\" >What is Surface Mount Technology (SMT)?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#SMT_Component_Packages\" >SMT Component Packages<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#SMT_Assembly_Process\" >SMT Assembly Process<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#How_do_Assembly_Processes_Differ\" >How do Assembly Processes Differ?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Wave_Soldering_vs_Reflow_Soldering\" >Wave Soldering vs. Reflow Soldering<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Pin-in-Paste_Technology\" >Pin-in-Paste Technology<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#What_are_the_Key_Technical_Differences\" >What are the Key Technical Differences?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Parasitic_Effects\" >Parasitic Effects<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Mechanical_Properties\" >Mechanical Properties<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Which_Technology_Offers_Better_Reliability\" >Which Technology Offers Better Reliability?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#IPC_Reliability_Standards\" >IPC Reliability Standards<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Failure_Analysis\" >Failure Analysis<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#How_do_Costs_Compare\" >How do Costs Compare?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Equipment_Investment\" >Equipment Investment<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#When_Should_You_Choose_THT\" >When Should You Choose THT?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#THT_Applications\" >THT Applications<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#High-Power_Requirements\" >High-Power Requirements<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#When_Should_You_Choose_SMT\" >When Should You Choose SMT?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#SMT_Applications\" >SMT Applications<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Design_for_Manufacturability_DfM\" >Design for Manufacturability (DfM)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Can_You_Use_Both_Technologies_Together\" >Can You Use Both Technologies Together?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Hybrid_Design_Guidelines\" >Hybrid Design Guidelines<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#High-Density_Interconnect_HDI_Boards\" >High-Density Interconnect (HDI) Boards<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Technical_Selection_Criteria\" >Technical Selection Criteria<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Environmental_Analysis\" >Environmental Analysis<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Volume_Thresholds\" >Volume Thresholds<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#Get_Professional_PCB_Assembly_Solutions\" >Get Professional PCB Assembly Solutions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#THT_vs_SMT_FAQs\" >THT vs SMT FAQs<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#What_solder_temperature_profiles_work_best_for_mixed_THTSMT_assemblies\" >What solder temperature profiles work best for mixed THT\/SMT assemblies?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#How_do_you_prevent_solder_joint_cracking_in_high-vibration_applications\" >How do you prevent solder joint cracking in high-vibration applications?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/promax2.seo2.au\/es\/blog\/connector-basics\/tht-vs-smt\/#What_are_the_main_design_rules_for_successful_pin-in-paste_implementation\" >What are the main design rules for successful pin-in-paste implementation?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Key_Takeaways\"><\/span>Key Takeaways<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>THT components can take a serious beating \u2014 their mechanical strength makes them perfect for devices that face constant vibration or rough handling<\/li>\n<li>SMT packs an impressive 50\u2013100 components per square inch while THT boards look practically empty in comparison \u2014 that&#8217;s why modern gadgets keep getting smaller<\/li>\n<li>Want the best of both worlds? Pin-in-paste soldering lets you mix THT and SMT on the same board without needing two separate production runs<\/li>\n<li>Those IPC standards aren&#8217;t just boring paperwork \u2014 they&#8217;re your roadmap to boards that actually pass quality testing the first time around<\/li>\n<li>Be honest about where your device will live \u2014 a board for a factory floor needs different assembly than one for a climate-controlled office<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"What_is_Through-Hole_Technology_THT\"><\/span>What is Through-Hole Technology (THT)?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Through-hole technology involves inserting component leads through holes drilled in the PCB and soldering them on the opposite side of the PCB. THT components have long metal leads that pass completely through the printed circuit. This creates strong mechanical connections that resist physical stress.<\/p>\n<p dir=\"ltr\">The process starts with PCB manufacturing, which includes drilling precise holes. Component leads go through these drilled holes. Wave soldering then joins the through-hole components to the side of the board in one automated step.<\/p>\n<p dir=\"ltr\">In 2024, about half of all electronics will be made using SMT, a little less than a third use THT, and the rest use other methods like COB, according to <a href=\"https:\/\/www.cognitivemarketresearch.com\/articles\/surface-mount-technology-smt-market-trends-and-future-opportunities\" target=\"_blank\" rel=\"nofollow noopener\">reports<\/a>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"THT_Component_Types\"><\/span>THT Component Types<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>DIP packages<\/strong> \u2014 Dual in-line plastic packages for ICs<\/li>\n<li><strong>Electrolytic capacitors<\/strong> \u2014 Large value capacitors for power supplies<\/li>\n<li><strong>Transformers<\/strong> \u2014 Power conversion electronic components<\/li>\n<li><strong>Connectors<\/strong> \u2014 Input\/output interfaces<\/li>\n<li><strong>Power resistor<\/strong> \u2014 High wattage resistive elements<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"THT_Assembly_Process\"><\/span>THT Assembly Process<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Using THT manufacturing follows these steps:<\/p>\n<ol>\n<li><strong>PCB fabrication<\/strong> with holes drilled<\/li>\n<li><strong>Component insertion<\/strong> through manual assembly or with machines<\/li>\n<li><strong>Wave soldering<\/strong> for electrical connections<\/li>\n<li><strong>Inspection<\/strong> using IPC-A-610 standards<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"What_is_Surface_Mount_Technology_SMT\"><\/span>What is Surface Mount Technology (SMT)?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Surface mount technology involves mounting components directly onto the surface of PCB pads without requiring holes on the PCB. SMT components have flat leads or contact pads that sit directly onto the surface. This allows much smaller components and higher circuit density.<\/p>\n<p dir=\"ltr\">The assembly process applies solder paste through stencils onto PCB pads. Pick-and-place machines position smd components with high precision. Reflow soldering heats the assembly to form permanent connections.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SMT_Component_Packages\"><\/span>SMT Component Packages<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table class=\"has-tablewrap\">\n<thead>\n<tr>\n<th>Package Type<\/th>\n<th>Description<\/th>\n<th>Applications<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>BGA<\/strong><\/td>\n<td>Ball Grid Array<\/td>\n<td>High pin count ICs<\/td>\n<\/tr>\n<tr>\n<td><strong>QFN<\/strong><\/td>\n<td>Quad Flat No-leads<\/td>\n<td>RF and power management<\/td>\n<\/tr>\n<tr>\n<td><strong>SOIC<\/strong><\/td>\n<td>Small Outline IC<\/td>\n<td>General purpose ICs<\/td>\n<\/tr>\n<tr>\n<td><strong>0805\/0603<\/strong><\/td>\n<td>Chip components<\/td>\n<td>Resistors and capacitors<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"SMT_Assembly_Process\"><\/span>SMT Assembly Process<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li><strong>Solder paste printing<\/strong> through metal stencils<\/li>\n<li><strong>Component placement<\/strong> using pick-and-place machines<\/li>\n<li><strong>Reflow soldering<\/strong> with controlled temperature profiles<\/li>\n<li><strong>Quality inspection<\/strong> per IPC J-STD-001 standards<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"How_do_Assembly_Processes_Differ\"><\/span>How do Assembly Processes Differ?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">THT requires hole drilling, component insertion, and wave soldering at 241\u00b0C to 260\u00b0C. SMT uses solder paste printing, automated placement, and reflow soldering with peak temperatures of 260\u00b0C for lead-free solder. The difference between SMT and THT is through-board versus surface mounting.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Wave_Soldering_vs_Reflow_Soldering\"><\/span>Wave Soldering vs. Reflow Soldering<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Wave soldering moves the PCB over molten solder waves. Components get soldered one side at a time. Reflow soldering heats the entire assembly simultaneously. All SMT components connect at once.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Pin-in-Paste_Technology\"><\/span>Pin-in-Paste Technology<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">This hybrid technique fills THT holes with solder paste before component insertion. Both THT assemblies and SMT assemblies then reflow together. This eliminates separate wave soldering steps.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_are_the_Key_Technical_Differences\"><\/span>What are the Key Technical Differences?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table class=\"has-tablewrap\">\n<thead>\n<tr>\n<th>Specification<\/th>\n<th>THT<\/th>\n<th>SMT<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Hole Requirements<\/strong><\/td>\n<td>Drilled and plated holes<\/td>\n<td>No holes needed, some vias required for internal interconnects<\/td>\n<\/tr>\n<tr>\n<td><strong>Component Density<\/strong><\/td>\n<td>10-20 per square inch<\/td>\n<td>50-100 per square inch<\/td>\n<\/tr>\n<tr>\n<td><strong>Solder Joint Type<\/strong><\/td>\n<td>Fillet joints<\/td>\n<td>Heel and toe joints<\/td>\n<\/tr>\n<tr>\n<td><strong>Assembly Speed<\/strong><\/td>\n<td>100\u2013500 components\/hour<\/td>\n<td>10,000+ components\/hour<\/td>\n<\/tr>\n<tr>\n<td><strong>Rework Difficulty<\/strong><\/td>\n<td>Standard soldering iron<\/td>\n<td>Hot air rework station<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Parasitic_Effects\"><\/span>Parasitic Effects<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">THT longer leads create higher parasitic inductance and capacitance. This limits high-frequency performance above 100MHz. SMD shorter connections reduce parasitics by 10x or more.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mechanical_Properties\"><\/span>Mechanical Properties<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">THT joints withstand 50G shock loads. SMT joints typically handle 20G maximum. Thermal cycling performance varies by package type and PCB design.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Which_Technology_Offers_Better_Reliability\"><\/span>Which Technology Offers Better Reliability?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">SMT joints show lower thermal stress due to shorter leads and better thermal matching. THT joints provide superior mechanical strength under shock and vibration. Environmental conditions determine which performs better compared to SMT alternatives.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"IPC_Reliability_Standards\"><\/span>IPC Reliability Standards<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Both technologies follow IPC-A-610 acceptability criteria. Class 1 covers general electronics. Class 2 handles dedicated service equipment. Class 3 applies to high-reliability applications.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Failure_Analysis\"><\/span>Failure Analysis<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">THT failures occur at lead-to-pad interfaces during thermal cycling. SMT failures happen at component terminations or solder joint necking. Proper design prevents both failure modes in circuit board applications.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_do_Costs_Compare\"><\/span>How do Costs Compare?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">SMT costs less due to automated assembly and smaller PCB sizes. Material costs favor SMT through eliminated drilling operations. Labor costs drop significantly with automated pick-and-place equipment for prototype and production runs.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Equipment_Investment\"><\/span>Equipment Investment<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table class=\"has-tablewrap\">\n<thead>\n<tr>\n<th>Equipment Type<\/th>\n<th>THT Cost<\/th>\n<th>SMT Cost<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Component insertion<\/strong><\/td>\n<td>$50K-200K<\/td>\n<td>$200K-800K<\/td>\n<\/tr>\n<tr>\n<td><strong>Soldering system<\/strong><\/td>\n<td>$30K-100K<\/td>\n<td>$100K-300K<\/td>\n<\/tr>\n<tr>\n<td><strong>Inspection equipment<\/strong><\/td>\n<td>$20K-80K<\/td>\n<td>$50K-200K<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p dir=\"ltr\">Higher SMT equipment costs pay back through increased throughput and lower per-unit assembly costs.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"When_Should_You_Choose_THT\"><\/span>When Should You Choose THT?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"blog-image aligncenter wp-image-15438 size-full\" src=\"https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications.jpg\" alt=\"tht applications\" width=\"1500\" height=\"1000\" srcset=\"https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications.jpg 1500w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications-300x200.jpg 300w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications-1030x687.jpg 1030w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications-768x512.jpg 768w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications-510x340.jpg 510w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications.jpg?w=600 600w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications.jpg?w=900 900w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications.jpg?w=1200 1200w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/tht-applications.jpg?w=450 450w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/><\/p>\n<p dir=\"ltr\">Choose THT for mechanical connectors, power components, and high-vibration environments. THT works best for low volumes under 1000 units. Manual assembly capability makes THT ideal for field-serviceable equipment.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"THT_Applications\"><\/span>THT Applications<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Automotive<\/strong> \u2014 Engine control modules, power supplies<\/li>\n<li><strong>Industrial<\/strong> \u2014 Motor drives, control panels<\/li>\n<li><strong>Aerospace<\/strong> \u2014 Avionics, power distribution<\/li>\n<li><strong>Military<\/strong> \u2014 Ruggedized communications equipment<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"High-Power_Requirements\"><\/span>High-Power Requirements<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Components above 5W typically require THT mounting for thermal dissipation. Large heat sinks attach more securely to through-hole mounting systems.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"When_Should_You_Choose_SMT\"><\/span>When Should You Choose SMT?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"blog-image aligncenter wp-image-15439 size-full\" src=\"https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications.jpg\" alt=\"smt applications\" width=\"1500\" height=\"1000\" srcset=\"https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications.jpg 1500w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications-300x200.jpg 300w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications-1030x687.jpg 1030w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications-768x512.jpg 768w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications-510x340.jpg 510w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications.jpg?w=600 600w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications.jpg?w=900 900w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications.jpg?w=1200 1200w, https:\/\/cdn.promaxpogopin.com\/wp-content\/uploads\/smt-applications.jpg?w=450 450w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/><\/p>\n<p dir=\"ltr\">Choose SMT for space-constrained designs requiring high component density. Automated production favors SMT above 1000 unit volumes. High-frequency circuits need SMT&#8217;s reduced parasitic effects on the side of the board.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SMT_Applications\"><\/span>SMT Applications<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Consumer electronics<\/strong> \u2014 Smartphones, tablets, wearables<\/li>\n<li><strong>Medical devices<\/strong> \u2014 Implantables, diagnostic equipment<\/li>\n<li><strong>Telecommunications<\/strong> \u2014 Network equipment, base stations<\/li>\n<li><strong>Computing<\/strong> \u2014 Processors, memory modules<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Design_for_Manufacturability_DfM\"><\/span>Design for Manufacturability (DfM)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">SMT designs require 0.1 mm minimum trace spacing and 0.2 mm via sizes. Component keep-out zones prevent placement conflicts. Thermal vias manage heat dissipation in high-power designs.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Can_You_Use_Both_Technologies_Together\"><\/span>Can You Use Both Technologies Together?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Mixed-technology PCBs combine THT and SMT on the same board. Pin-in-paste soldering enables simultaneous reflow of both component types. This optimizes each technology&#8217;s strengths for PCB assembly projects.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Hybrid_Design_Guidelines\"><\/span>Hybrid Design Guidelines<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Component height matching<\/strong> prevents reflow shadows<\/li>\n<li><strong>Thermal profiling<\/strong> accommodates both package types<\/li>\n<li><strong>Stencil design<\/strong> handles paste and holes simultaneously<\/li>\n<li><strong>Assembly sequence<\/strong> may require selective processes<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"High-Density_Interconnect_HDI_Boards\"><\/span>High-Density Interconnect (HDI) Boards<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">HDI designs use microvias and buried vias for maximum density. SMT components mount on multiple layers. THT components provide mechanical anchoring.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Technical_Selection_Criteria\"><\/span>Technical Selection Criteria<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Evaluate environmental conditions, production volume, and component availability. Create decision matrices weighing mechanical stress, space constraints, and cost factors. Consider long-term serviceability requirements for your printed circuit board design.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Environmental_Analysis\"><\/span>Environmental Analysis<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Temperature cycling, vibration levels, and humidity exposure guide technology selection. Military specifications often require THT for critical connections. Consumer products favor SMT for cost and size.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Volume_Thresholds\"><\/span>Volume Thresholds<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Below 100 units<\/strong>: THT for simplicity<\/li>\n<li><strong>100\u20131000 units<\/strong>: Either technology viable<\/li>\n<li><strong>Above 1000 units<\/strong>: SMT for cost efficiency<\/li>\n<li><strong>Above 10,000 units<\/strong>: SMT strongly preferred<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Get_Professional_PCB_Assembly_Solutions\"><\/span>Get Professional PCB Assembly Solutions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Choosing the right PCB technology requires careful analysis of your specific needs. THT delivers unmatched mechanical strength for demanding applications. SMT provides superior density and cost efficiency for high-volume production. Many designs benefit from hybrid approaches combining both technologies.<\/p>\n<p dir=\"ltr\">Professional interconnect solutions ensure reliable connections regardless of your chosen assembly method. <a href=\"\/es\/contact\/\">Contact our engineering team<\/a> to discuss how precision <a href=\"\/es\/pogo-pin-connector\/\">connector<\/a> systems can optimize your next PCB design project.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"THT_vs_SMT_FAQs\"><\/span>THT vs SMT FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"What_solder_temperature_profiles_work_best_for_mixed_THTSMT_assemblies\"><\/span>What solder temperature profiles work best for mixed THT\/SMT assemblies?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Peak reflow temperatures of 245-260\u00b0C work for most mixed assemblies using lead-free solder. THT components must withstand SMT reflow temperatures, requiring careful component selection. Temperature profiling prevents thermal damage to sensitive components.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_do_you_prevent_solder_joint_cracking_in_high-vibration_applications\"><\/span>How do you prevent solder joint cracking in high-vibration applications?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Conformal coating protects solder joints from moisture and mechanical stress. Underfill materials reinforce BGA and flip-chip connections. Proper PCB support and mounting reduces board flexing during vibration.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_are_the_main_design_rules_for_successful_pin-in-paste_implementation\"><\/span>What are the main design rules for successful pin-in-paste implementation?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Hole sizes should be 0.05-0.1 mm larger than component leads for proper paste filling. Stencil thickness of 0.1-0.15 mm provides adequate paste volume. Component standoff heights must accommodate paste thickness and prevent tombstoning.<\/p>\n<p dir=\"ltr\">Back to Top: <a href=\"#\">THT vs SMT | Which PCB Assembly Technology Is Right for Your Project?<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>When designing electronic devices, one of the biggest decisions you&#8217;ll face happens before a single component gets placed \u2014 choosing between Through-Hole Technology (THT) and Surface Mount Technology (SMT). It&#8217;s like deciding between manual and automatic transmission \u2014 neither is universally &#8220;better,&#8221; but each shines in specific situations. Get this choice wrong, and you&#8217;re setting [&#8230;]\n","protected":false},"author":8,"featured_media":15438,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"THT vs SMT | Which PCB Assembly Technology Is Right for Your Project?","_seopress_titles_desc":"","_seopress_robots_index":"","inline_featured_image":false,"_lmt_disableupdate":"no","_lmt_disable":"no","footnotes":""},"categories":[93],"tags":[],"class_list":{"0":"post-15434","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-connector-basics"},"acf":[],"modified_by":"Promax Pogo Pins","_links":{"self":[{"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/posts\/15434","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/comments?post=15434"}],"version-history":[{"count":1,"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/posts\/15434\/revisions"}],"predecessor-version":[{"id":15440,"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/posts\/15434\/revisions\/15440"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/media\/15438"}],"wp:attachment":[{"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/media?parent=15434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/categories?post=15434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/promax2.seo2.au\/es\/wp-json\/wp\/v2\/tags?post=15434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}