Selecting an SMT line for power electronics PCBA requires a fundamentally different approach from consumer electronics manufacturing. Thick PCBs, high thermal mass components, and long product lifecycles demand greater focus on process stability, thermal consistency, and long-term reliability. This article provides a practical framework for evaluating SMT line capacity, equipment selection, inspection strategy, layout planning, and supplier capability—helping manufacturers reduce operational risk and build scalable, reliable production systems for power electronics applications.