{"id":6011,"date":"2026-04-23T14:38:36","date_gmt":"2026-04-23T06:38:36","guid":{"rendered":"https:\/\/txjpcba.com\/?p=6011"},"modified":"2026-04-23T14:38:36","modified_gmt":"2026-04-23T06:38:36","slug":"what-is-selective-soldering","status":"publish","type":"post","link":"https:\/\/txjpcba.com\/pt\/what-is-selective-soldering\/","title":{"rendered":"What is selective soldering?"},"content":{"rendered":"

Is Selective Soldering<\/strong><\/span><\/h2>\n

Selective soldering is a precise soldering process used in Montagem de PCB<\/strong><\/a> to solder specific through-hole components on a printed circuit board without affecting surrounding areas. It is commonly used in boards that combine Montagem SMT<\/strong> and through-hole technology, where sensitive surface-mount components have already been soldered and must be protected from additional heat.<\/p>\n

Unlike wave soldering, which exposes the entire board to molten solder, selective soldering targets only designated areas, offering greater control and flexibility.<\/p>\n

\"What
What is selective soldering<\/figcaption><\/figure>\n

How Selective Soldering Works<\/strong><\/span><\/h2>\n

The selective soldering process typically involves several controlled steps.<\/p>\n

First, flux is applied only to the areas that require soldering. This localized application prevents contamination of other parts of the PCB.<\/p>\n

Next, the board is preheated to activate the flux and reduce thermal stress. Preheating is carefully controlled to avoid damaging previously soldered SMT components.<\/p>\n

Then, a programmable solder nozzle or mini solder wave is used to apply molten solder directly to the selected pins and pads. The machine follows precise coordinates, ensuring accurate solder joints.<\/p>\n

Finally, the board is cooled, allowing the solder to solidify and form reliable electrical and mechanical connections.<\/p>\n