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Selective wave soldering (selective soldering) is precision soldering equipment for SMT+THT mixed-assembly circuit boards. Unlike traditional wave soldering, which immerses the entire board in solder, it uses fixed-point local soldering, applying flux, preheating, and completing solder wave soldering only on the through-hole pins that need to be soldered, maximizing protection of surrounding heat-sensitive SMD components from high-temperature thermal shock. It is widely used in high-end manufacturing fields such as automotive electronics BMS, electronic control modules, medical testing mainboards, industrial PLC control boards, energy storage inverters, communication base station boards, and rail transit electronics, meeting high-grade soldering quality standards such as IATF16949 and IPC-A-610.

Dongguan Mingrui Technology Co., Ltd. develops and produces selective wave soldering equipment. It is equipped with a vision positioning system and supports PCB warpage compensation, enabling precise identification of solder joint coordinates; the independent nozzle design allows different specification nozzles to be replaced according to the product. The equipment supports standalone offline production and can also connect to SMT production lines for automated inline operation, adapting to high-end PCBA production of multiple varieties and small to medium batches. Mingrui selective wave soldering can meet the lead-free soldering needs of foreign trade customers' export orders, providing process sample testing, program debugging, and overseas technical support services, stably ensuring solder joint through-hole fill rate and consistency.