{"id":4815,"date":"2026-04-07T14:19:58","date_gmt":"2026-04-07T06:19:58","guid":{"rendered":"https:\/\/txjpcba.com\/?p=4815"},"modified":"2026-04-07T14:19:58","modified_gmt":"2026-04-07T06:19:58","slug":"what-is-dielectric-strength-in-coating","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/zh\/what-is-dielectric-strength-in-coating\/","title":{"rendered":"What is dielectric strength in coating?"},"content":{"rendered":"

Dielectric strength in coating<\/h3>\n

Dielectric strength<\/strong> \u65bc \u5857\u5c64<\/strong> refers to the material\u2019s ability to withstand high electrical voltage without breaking down or allowing current to pass through<\/strong>. It is a critical property in PCB \u7d44\u88dd<\/strong>, \u539f\u578b PCB \u7d44\u88dd<\/strong>, \u4ee5\u53ca SMT \u7d44\u88dd<\/strong>, where coatings are used not only for environmental protection but also for electrical insulation.<\/p>\n

\"What
What is dielectric strength in coating<\/figcaption><\/figure>\n

Dielectric strength is typically measured in volts per unit thickness<\/strong> (e.g., volts per mil or kV\/mm). It indicates how much voltage the coating can resist before electrical failure occurs. A higher dielectric strength means better insulating performance, which helps prevent short circuits, arcing, and leakage currents between conductive elements on a PCB.<\/p>\n

In practical terms, when a \u4fdd\u5f62\u5857\u5c64<\/strong><\/a> with high dielectric strength is applied to a circuit board, it creates a reliable insulating barrier over traces, solder joints, and components. This is especially important in high-voltage or high-density designs commonly seen in SMT \u7d44\u88dd<\/strong><\/a>, where spacing between conductors is minimal.<\/p>\n

Different coating materials offer varying dielectric strengths:<\/p>\n