{"id":6369,"date":"2026-05-05T16:27:09","date_gmt":"2026-05-05T08:27:09","guid":{"rendered":"https:\/\/txjpcba.com\/?p=6369"},"modified":"2026-05-05T16:27:09","modified_gmt":"2026-05-05T08:27:09","slug":"what-is-selective-soldering-used-for","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/ja\/what-is-selective-soldering-used-for\/","title":{"rendered":"What is selective soldering used for?"},"content":{"rendered":"<h2 data-section-id=\"sg4r14\" data-start=\"0\" data-end=\"43\"><span role=\"text\"><strong data-start=\"3\" data-end=\"43\">Is Selective Soldering Used For<\/strong><\/span><\/h2>\n<p data-start=\"45\" data-end=\"331\">Selective soldering is a specialized soldering process used in <a href=\"https:\/\/txjpcba.com\/ja\/pcb%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa\/\"><strong data-start=\"108\" data-end=\"124\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong><\/a> to solder specific through-hole components on a board without affecting surrounding areas. It is commonly applied in mixed-technology boards where both surface-mount and through-hole components are present.<\/p>\n<p data-start=\"333\" data-end=\"481\">This method is widely used in <strong data-start=\"363\" data-end=\"379\">SMT\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong> environments and advanced <strong data-start=\"406\" data-end=\"430\">\u30bf\u30fc\u30f3\u30ad\u30fcPCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong> projects where precision and control are required.<\/p>\n<figure id=\"attachment_6370\" aria-describedby=\"caption-attachment-6370\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-6370\" src=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-selective-soldering-used-for.jpg\" alt=\"What is selective soldering used for\" width=\"800\" height=\"597\" srcset=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-selective-soldering-used-for.jpg 800w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-selective-soldering-used-for-300x224.jpg 300w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-selective-soldering-used-for-768x573.jpg 768w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/05\/What-is-selective-soldering-used-for-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-6370\" class=\"wp-caption-text\">What is selective soldering used for<\/figcaption><\/figure>\n<h2 data-section-id=\"i8qu9v\" data-start=\"483\" data-end=\"523\"><span role=\"text\"><strong data-start=\"486\" data-end=\"523\">Why Selective Soldering Is Needed<\/strong><\/span><\/h2>\n<p data-start=\"525\" data-end=\"725\">\u73fe\u4ee3\u306e <a href=\"https:\/\/txjpcba.com\/ja\/%e3%83%97%e3%83%aa%e3%83%b3%e3%83%88%e5%9f%ba%e6%9d%bf%e8%a3%bd%e9%80%a0\/\"><strong data-start=\"535\" data-end=\"556\">PCB\u88fd\u9020<\/strong><\/a>, most components are placed using SMT processes. However, certain components\u2014such as connectors, transformers, and large capacitors\u2014still require through-hole mounting.<\/p>\n<p data-start=\"727\" data-end=\"916\">Traditional wave soldering can expose the entire board to molten solder, which may damage sensitive SMT components. Selective soldering solves this problem by targeting only specific areas.<\/p>\n<p align=\"center\"><a href=\"\/ja\/%e3%83%97%e3%83%aa%e3%83%b3%e3%83%88%e5%9f%ba%e6%9d%bf%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa%e3%81%ae%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%82%92%e5%8f%96%e3%82%8b\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea\u306e\u304a\u898b\u7a4d\u3082\u308a<\/button><\/a><\/p>\n<h2 data-section-id=\"3fo19i\" data-start=\"918\" data-end=\"957\"><span role=\"text\"><strong data-start=\"921\" data-end=\"957\">Main Uses of Selective Soldering<\/strong><\/span><\/h2>\n<p data-start=\"959\" data-end=\"1012\">Selective soldering is used in several key scenarios.<\/p>\n<h3 data-section-id=\"1owdfbz\" data-start=\"1014\" data-end=\"1043\"><span role=\"text\"><strong data-start=\"1018\" data-end=\"1043\">Mixed Technology PCBs<\/strong><\/span><\/h3>\n<p data-start=\"1044\" data-end=\"1181\">When a PCB contains both SMT and through-hole components, selective soldering is used after reflow to solder only the through-hole parts.<\/p>\n<h3 data-section-id=\"1y5yud9\" data-start=\"1183\" data-end=\"1222\"><span role=\"text\"><strong data-start=\"1187\" data-end=\"1222\">Protecting Sensitive Components<\/strong><\/span><\/h3>\n<p data-start=\"1223\" data-end=\"1316\">It prevents heat or solder exposure to sensitive SMT components already mounted on the board.<\/p>\n<h3 data-section-id=\"1g6trw6\" data-start=\"1318\" data-end=\"1345\"><span role=\"text\"><strong data-start=\"1322\" data-end=\"1345\">Complex PCB Designs<\/strong><\/span><\/h3>\n<p data-start=\"1346\" data-end=\"1447\">For high-density or complex layouts, selective soldering provides better control than wave soldering.<\/p>\n<h3 data-section-id=\"1ucazr3\" data-start=\"1449\" data-end=\"1488\"><span role=\"text\"><strong data-start=\"1453\" data-end=\"1488\">Low to Medium Volume Production<\/strong><\/span><\/h3>\n<p data-start=\"1489\" data-end=\"1611\">It is suitable for flexible production environments where different PCB designs are processed in <a href=\"https:\/\/txjpcba.com\/ja\/%e3%82%bf%e3%83%bc%e3%83%b3%e3%82%ad%e3%83%bc-pcb-%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa\/\"><strong data-start=\"1586\" data-end=\"1610\">\u30bf\u30fc\u30f3\u30ad\u30fcPCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong><\/a>.<\/p>\n<h2 data-section-id=\"k2ow1i\" data-start=\"1613\" data-end=\"1649\"><span role=\"text\"><strong data-start=\"1616\" data-end=\"1649\">\u9078\u629e\u306f\u3093\u3060\u4ed8\u3051\u306e\u4ed5\u7d44\u307f<\/strong><\/span><\/h2>\n<p data-start=\"1651\" data-end=\"1707\">The process typically involves several controlled steps.<\/p>\n<p data-start=\"1709\" data-end=\"1760\">Flux is applied only to the target soldering areas.<\/p>\n<p data-start=\"1762\" data-end=\"1808\">The PCB is preheated to prepare for soldering.<\/p>\n<p data-start=\"1810\" data-end=\"1902\">A mini solder wave or soldering nozzle selectively applies molten solder to specific joints.<\/p>\n<p data-start=\"1904\" data-end=\"1979\">Each joint is soldered individually or in small groups with high precision.<\/p>\n<p data-start=\"1981\" data-end=\"2055\">This controlled approach ensures high-quality results in <strong data-start=\"2038\" data-end=\"2054\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>.<\/p>\n<h2 data-section-id=\"1rtsb8l\" data-start=\"2057\" data-end=\"2097\"><span role=\"text\"><strong data-start=\"2060\" data-end=\"2097\">\u9078\u629e\u306f\u3093\u3060\u4ed8\u3051\u306e\u5229\u70b9<\/strong><\/span><\/h2>\n<p data-start=\"2099\" data-end=\"2143\">Selective soldering offers several benefits.<\/p>\n<p data-start=\"2145\" data-end=\"2206\">High precision with minimal impact on surrounding components.<\/p>\n<p data-start=\"2208\" data-end=\"2252\">Reduced risk of solder bridging and defects.<\/p>\n<p data-start=\"2254\" data-end=\"2304\">Better thermal control compared to wave soldering.<\/p>\n<p data-start=\"2306\" data-end=\"2371\">Ideal for complex and high-reliability <strong data-start=\"2345\" data-end=\"2361\">SMT\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong> \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u53c2\u52a0\u3057\u3066\u3044\u308b\u3002.<\/p>\n<p data-start=\"2373\" data-end=\"2422\">Improved flexibility in <strong data-start=\"2397\" data-end=\"2421\">\u30bf\u30fc\u30f3\u30ad\u30fcPCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>.<\/p>\n<h2 data-section-id=\"9xko6\" data-start=\"2424\" data-end=\"2465\"><span role=\"text\"><strong data-start=\"2427\" data-end=\"2465\">Limitations of Selective Soldering<\/strong><\/span><\/h2>\n<p data-start=\"2467\" data-end=\"2518\">Despite its advantages, there are some limitations.<\/p>\n<p data-start=\"2520\" data-end=\"2565\">Slower than wave soldering for large volumes.<\/p>\n<p data-start=\"2567\" data-end=\"2606\">Higher equipment and programming costs.<\/p>\n<p data-start=\"2608\" data-end=\"2656\">Requires careful process setup and optimization.<\/p>\n<h2 data-section-id=\"fv5r93\" data-start=\"2658\" data-end=\"2702\"><span role=\"text\"><strong data-start=\"2661\" data-end=\"2702\">\u9078\u629e\u306f\u3093\u3060\u4ed8\u3051\u3068\u30a6\u30a7\u30fc\u30d6\u306f\u3093\u3060\u4ed8\u3051<\/strong><\/span><\/h2>\n<p data-start=\"2704\" data-end=\"2796\">Selective soldering targets specific areas, while wave soldering processes the entire board.<\/p>\n<p data-start=\"2798\" data-end=\"2868\">Selective soldering is more precise and suitable for mixed assemblies.<\/p>\n<p data-start=\"2870\" data-end=\"2946\">Wave soldering is faster and better for high-volume through-hole production.<\/p>\n<h2 data-section-id=\"hnqv6\" data-start=\"2948\" data-end=\"2975\"><span role=\"text\"><strong data-start=\"2951\" data-end=\"2975\">Role in SMT Assembly<\/strong><\/span><\/h2>\n<p data-start=\"2977\" data-end=\"3059\">\u3067 <a href=\"https:\/\/txjpcba.com\/ja\/smt%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa%e3%83%bc%e3%82%b5%e3%83%bc%e3%83%93%e3%82%b9\/\"><strong data-start=\"2980\" data-end=\"2996\">SMT\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong><\/a>, selective soldering is typically used after reflow soldering.<\/p>\n<p data-start=\"3061\" data-end=\"3202\">Once SMT components are soldered, selective soldering is applied to complete the through-hole connections without disturbing existing joints.<\/p>\n<h2 data-section-id=\"1hz5xg3\" data-start=\"3204\" data-end=\"3239\"><span role=\"text\"><strong data-start=\"3207\" data-end=\"3239\">Role in Turnkey PCB Assembly<\/strong><\/span><\/h2>\n<p data-start=\"3241\" data-end=\"3339\">\u3067 <strong data-start=\"3244\" data-end=\"3268\">\u30bf\u30fc\u30f3\u30ad\u30fcPCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, selective soldering is an essential step for handling complex boards.<\/p>\n<p data-start=\"3341\" data-end=\"3467\">It ensures that both SMT and through-hole components are assembled efficiently while maintaining high quality and reliability.<\/p>\n<h2 data-section-id=\"9dt57q\" data-start=\"3469\" data-end=\"3486\"><span role=\"text\"><strong data-start=\"3472\" data-end=\"3486\">\u7d50\u8ad6<\/strong><\/span><\/h2>\n<p data-start=\"3488\" data-end=\"3712\">Selective soldering is a critical process in modern electronics manufacturing, especially for mixed-technology PCBs. It provides precise, controlled soldering of through-hole components without affecting sensitive SMT parts.<\/p>\n<p data-start=\"3714\" data-end=\"3896\">\u3067 <strong data-start=\"3717\" data-end=\"3733\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, <strong data-start=\"3735\" data-end=\"3751\">SMT\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, \u305d\u3057\u3066 <strong data-start=\"3757\" data-end=\"3781\">\u30bf\u30fc\u30f3\u30ad\u30fcPCB\u30a2\u30bb\u30f3\u30d6\u30ea<\/strong>, selective soldering plays a key role in achieving high-quality results for complex and high-reliability products.<\/p>\n<p align=\"center\"><a href=\"\/ja\/%e3%83%97%e3%83%aa%e3%83%b3%e3%83%88%e5%9f%ba%e6%9d%bf%e3%82%a2%e3%82%bb%e3%83%b3%e3%83%96%e3%83%aa%e3%81%ae%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%82%92%e5%8f%96%e3%82%8b\/\"><button style=\"background: black; color: white; padding: 8px 20px; border: none; cursor: pointer;\">PCB\u30a2\u30bb\u30f3\u30d6\u30ea\u306e\u304a\u898b\u7a4d\u3082\u308a<\/button><\/a><\/p>\n<p style=\"text-align: center;\">\u5c02\u9580\u5bb6\u306e\u30a2\u30c9\u30d0\u30a4\u30b9\u3068\u6b63\u78ba\u306a\u4fa1\u683c\u3092\u30ef\u30f3\u30b9\u30c6\u30c3\u30d7\u3067\u3002\u4eca\u3059\u3050\u304a\u898b\u7a4d\u3082\u308a\u3092\u3054\u4f9d\u983c\u304f\u3060\u3055\u3044\u3002.<br \/>\nSMT\u3001DIP\u3001\u30d5\u30eb\u30bf\u30fc\u30f3\u30ad\u30fc\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u542b\u3080\u30d7\u30ed\u30d5\u30a7\u30c3\u30b7\u30e7\u30ca\u30eb\u306aPCB\u30a2\u30bb\u30f3\u30d6\u30ea\u30b5\u30fc\u30d3\u30b9\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002.<\/p>\n<p style=\"text-align: center;\">\u5229\u7528\u3067\u304d\u308b NDA \u2714 24 \u6642\u9593\u4ee5\u5185\u306e\u901f\u3044\u5f15\u7528\u8a9e\u53e5 \u2714 ISO \u306b\u3088\u3063\u3066\u8a3c\u660e\u3055\u308c\u308b\u5de5\u5834 \u2714 \u30ef\u30f3\u30b9\u30c8\u30c3\u30d7 PCB \u53ca\u3073 PCBA \u30b5\u30fc\u30d3\u30b9<\/p>","protected":false},"excerpt":{"rendered":"<p>Is Selective Soldering Used For Selective soldering is a specialized soldering process used in PCB Assembly to solder specific through-hole [&hellip;]<\/p>","protected":false},"author":1,"featured_media":6370,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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