{"id":4940,"date":"2026-04-08T14:20:57","date_gmt":"2026-04-08T06:20:57","guid":{"rendered":"https:\/\/txjpcba.com\/?p=4940"},"modified":"2026-04-08T14:20:57","modified_gmt":"2026-04-08T06:20:57","slug":"%e9%ab%98%e9%9b%bb%e5%9c%a7%e3%83%97%e3%83%aa%e3%83%b3%e3%83%88%e5%9f%ba%e6%9d%bf%e3%81%ab%e6%9c%80%e9%81%a9%e3%81%aa%e3%82%b3%e3%83%bc%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%81%a8%e3%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/ja\/%e9%ab%98%e9%9b%bb%e5%9c%a7%e3%83%97%e3%83%aa%e3%83%b3%e3%83%88%e5%9f%ba%e6%9d%bf%e3%81%ab%e6%9c%80%e9%81%a9%e3%81%aa%e3%82%b3%e3%83%bc%e3%83%86%e3%82%a3%e3%83%b3%e3%82%b0%e3%81%a8%e3%81%af%ef%bc%9f\/","title":{"rendered":"\u9ad8\u96fb\u5727\u30d7\u30ea\u30f3\u30c8\u57fa\u677f\u306b\u6700\u9069\u306a\u30b3\u30fc\u30c6\u30a3\u30f3\u30b0\u3068\u306f\uff1f"},"content":{"rendered":"<h2 data-start=\"0\" data-end=\"49\"><strong data-start=\"0\" data-end=\"49\">Best coating for high voltage PCB<\/strong><\/h2>\n<p data-start=\"51\" data-end=\"330\">For high-voltage applications, the key requirement is <strong data-start=\"105\" data-end=\"157\">high dielectric strength (insulation capability)<\/strong>, along with resistance to moisture, contamination, and electrical arcing. The best <a href=\"https:\/\/txjpcba.com\/conformal-coating\/\"><strong data-start=\"241\" data-end=\"262\">Conformal Coating<\/strong><\/a> is not just one type\u2014it depends on performance level\u2014but generally:<\/p>\n<p data-start=\"332\" data-end=\"415\">\ud83d\udc49 <strong data-start=\"335\" data-end=\"415\">Silicone and parylene coatings are considered the best for high-voltage PCBs<\/strong><\/p>\n<figure id=\"attachment_4941\" aria-describedby=\"caption-attachment-4941\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-4941\" src=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-best-coating-for-high-voltage-PCB.jpg\" alt=\"What is best coating for high voltage PCB\" width=\"800\" height=\"597\" srcset=\"https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-best-coating-for-high-voltage-PCB.jpg 800w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-best-coating-for-high-voltage-PCB-300x224.jpg 300w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-best-coating-for-high-voltage-PCB-768x573.jpg 768w, https:\/\/txjpcba.com\/wp-content\/uploads\/2026\/04\/What-is-best-coating-for-high-voltage-PCB-16x12.jpg 16w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-4941\" class=\"wp-caption-text\">What is best coating for high voltage PCB<\/figcaption><\/figure>\n<p data-start=\"417\" data-end=\"461\"><strong data-start=\"417\" data-end=\"461\">Best overall: Silicone conformal coating<\/strong><\/p>\n<p data-start=\"463\" data-end=\"588\">Silicone <strong data-start=\"472\" data-end=\"493\">Conformal Coating<\/strong> is widely regarded as the best balance for high-voltage <strong data-start=\"550\" data-end=\"566\">PCB Assembly<\/strong> and <a href=\"https:\/\/txjpcba.com\/smt-assembly-services\/\"><strong data-start=\"571\" data-end=\"587\">SMT Assembly<\/strong><\/a>.<\/p>\n<p data-start=\"590\" data-end=\"616\"><strong data-start=\"590\" data-end=\"616\">Why silicone is ideal:<\/strong><\/p>\n<ul data-start=\"618\" data-end=\"878\">\n<li data-section-id=\"1k372l1\" data-start=\"618\" data-end=\"707\"><strong data-start=\"620\" data-end=\"648\">High dielectric strength<\/strong> (up to ~500 V\/mil)<\/li>\n<li data-section-id=\"1kdno0c\" data-start=\"708\" data-end=\"769\">Excellent performance under high temperature and humidity<\/li>\n<li data-section-id=\"13o5mlu\" data-start=\"770\" data-end=\"825\">Flexible \u2192 reduces cracking under electrical stress<\/li>\n<li data-section-id=\"1unip6q\" data-start=\"826\" data-end=\"878\">Strong resistance to corona discharge and arcing<\/li>\n<\/ul>\n<p data-start=\"880\" data-end=\"1024\">Silicone coatings are commonly used in power electronics, automotive systems, and industrial high-voltage designs where reliability is critical.<\/p>\n<p data-start=\"1026\" data-end=\"1076\"><strong data-start=\"1026\" data-end=\"1076\">Best for extreme performance: Parylene coating<\/strong><\/p>\n<p data-start=\"1078\" data-end=\"1200\">If you need the highest insulation performance, <strong data-start=\"1126\" data-end=\"1138\">parylene<\/strong> is often the top choice in advanced <a href=\"https:\/\/txjpcba.com\/turnkey-pcb-assembly\/\"><strong data-start=\"1175\" data-end=\"1199\">Turnkey PCB Assembly<\/strong><\/a>.<\/p>\n<p data-start=\"1202\" data-end=\"1217\"><strong data-start=\"1202\" data-end=\"1217\">Advantages:<\/strong><\/p>\n<ul data-start=\"1219\" data-end=\"1498\">\n<li data-section-id=\"ojdfzt\" data-start=\"1219\" data-end=\"1281\">Extremely uniform, pinhole-free coating (vapor deposition)<\/li>\n<li data-section-id=\"1s8w3kz\" data-start=\"1282\" data-end=\"1380\">Very high dielectric strength and insulation reliability<\/li>\n<li data-section-id=\"12a2hf1\" data-start=\"1381\" data-end=\"1440\">Excellent protection against moisture and contamination<\/li>\n<li data-section-id=\"2b3gbu\" data-start=\"1441\" data-end=\"1498\">Ideal for compact, high-voltage, high-density designs<\/li>\n<\/ul>\n<p data-start=\"1500\" data-end=\"1548\"><strong data-start=\"1500\" data-end=\"1515\">Limitation:<\/strong> High cost and complex processing<\/p>\n<p data-start=\"1550\" data-end=\"1574\"><strong data-start=\"1550\" data-end=\"1574\">Other viable options<\/strong><\/p>\n<ul data-start=\"1576\" data-end=\"2056\">\n<li data-section-id=\"yg4wwq\" data-start=\"1576\" data-end=\"1762\"><strong data-start=\"1578\" data-end=\"1602\">Polyurethane coating<\/strong>\n<ul data-start=\"1607\" data-end=\"1762\">\n<li data-section-id=\"1ghvohx\" data-start=\"1607\" data-end=\"1686\">Good dielectric strength (~350 V\/mil)<\/li>\n<li data-section-id=\"15k8mf0\" data-start=\"1689\" data-end=\"1719\">Strong chemical resistance<\/li>\n<li data-section-id=\"lu6s77\" data-start=\"1722\" data-end=\"1762\">Suitable for industrial environments<\/li>\n<\/ul>\n<\/li>\n<li data-section-id=\"1wqxsh8\" data-start=\"1764\" data-end=\"1876\"><strong data-start=\"1766\" data-end=\"1783\">Epoxy coating<\/strong>\n<ul data-start=\"1788\" data-end=\"1876\">\n<li data-section-id=\"3ovif0\" data-start=\"1788\" data-end=\"1822\">High insulation and durability<\/li>\n<li data-section-id=\"1fmb92y\" data-start=\"1825\" data-end=\"1876\">Better for harsh environments but less flexible<\/li>\n<\/ul>\n<\/li>\n<li data-section-id=\"1q93gtc\" data-start=\"1878\" data-end=\"2056\"><strong data-start=\"1880\" data-end=\"1899\">Acrylic coating<\/strong>\n<ul data-start=\"1904\" data-end=\"2056\">\n<li data-section-id=\"vfoqgx\" data-start=\"1904\" data-end=\"2003\">Lower cost, moderate dielectric strength (~300\u2013400 V\/mil)<\/li>\n<li data-section-id=\"1gkuk8v\" data-start=\"2006\" data-end=\"2056\">Not ideal for high-voltage or harsh conditions<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p data-start=\"2058\" data-end=\"2098\"><strong data-start=\"2058\" data-end=\"2098\">Why coating matters for high voltage<\/strong><\/p>\n<p data-start=\"2100\" data-end=\"2148\">In high-voltage <a href=\"https:\/\/txjpcba.com\/pcb-assembly\/\"><strong data-start=\"2116\" data-end=\"2132\">PCB Assembly<\/strong><\/a>, risks include:<\/p>\n<ul data-start=\"2150\" data-end=\"2252\">\n<li data-section-id=\"1u89i5y\" data-start=\"2150\" data-end=\"2171\">Electrical arcing<\/li>\n<li data-section-id=\"1t2fks2\" data-start=\"2172\" data-end=\"2192\">Leakage currents<\/li>\n<li data-section-id=\"1f3xxs6\" data-start=\"2193\" data-end=\"2222\">Electrochemical migration<\/li>\n<li data-section-id=\"8ypdal\" data-start=\"2223\" data-end=\"2252\">Reduced creepage distance<\/li>\n<\/ul>\n<p data-start=\"2254\" data-end=\"2285\"><strong data-start=\"2254\" data-end=\"2275\">Conformal Coating<\/strong> helps by:<\/p>\n<ul data-start=\"2287\" data-end=\"2534\">\n<li data-section-id=\"18pk4d3\" data-start=\"2287\" data-end=\"2329\">Increasing surface dielectric strength<\/li>\n<li data-section-id=\"1hftsdt\" data-start=\"2330\" data-end=\"2369\">Preventing moisture-induced leakage<\/li>\n<li data-section-id=\"2s772d\" data-start=\"2370\" data-end=\"2451\">Suppressing arcing and corona discharge<\/li>\n<li data-section-id=\"qb929i\" data-start=\"2452\" data-end=\"2534\">Improving long-term insulation stability<\/li>\n<\/ul>\n<p data-start=\"2536\" data-end=\"2550\"><strong data-start=\"2536\" data-end=\"2550\">Conclusion<\/strong><\/p>\n<ul data-start=\"2552\" data-end=\"2723\">\n<li data-section-id=\"qkb976\" data-start=\"2552\" data-end=\"2617\"><strong data-start=\"2554\" data-end=\"2588\">Best overall for high voltage:<\/strong> Silicone conformal coating<\/li>\n<li data-section-id=\"11enh78\" data-start=\"2618\" data-end=\"2682\"><strong data-start=\"2620\" data-end=\"2663\">Best for extreme\/high-end applications:<\/strong> Parylene coating<\/li>\n<li data-section-id=\"1ydvap2\" data-start=\"2683\" data-end=\"2723\"><strong data-start=\"2685\" data-end=\"2708\">Budget alternative:<\/strong> Polyurethane<\/li>\n<\/ul>\n<p data-start=\"2725\" data-end=\"2911\">In <strong data-start=\"2728\" data-end=\"2744\">PCB Assembly<\/strong>, <strong data-start=\"2746\" data-end=\"2762\">SMT Assembly<\/strong>, and <strong data-start=\"2768\" data-end=\"2792\">Turnkey PCB Assembly<\/strong>, the right coating choice should be based on voltage level, environment, and reliability requirements\u2014not just cost.<\/p>\n<div style=\"background: #f8f8f8; border: 1px solid #e5e5e5; padding: 25px; margin-top: 30px; border-radius: 6px;\">\n<div style=\"text-align: center;\">\n<h3 style=\"margin-bottom: 10px; font-size: 22px;\">Get a Conformal Coating Quote<\/h3>\n<p style=\"font-size: 15px; color: #555; margin-bottom: 15px;\">Have a PCB project that requires conformal coating? 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#888; margin-top: 15px; text-align: center;\">Shenzhen Tengxinjie Electronics Co., Ltd.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Best coating for high voltage PCB For high-voltage applications, the key requirement is high dielectric strength (insulation capability), along with 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