October 27, 2026

Stop chasing universal selective soldering settings that don’t exist. This guide walks you through validated starting ranges for SAC305 and other alloys, explains how speed and temperature actually work together, and shows you how to measure your way to a process window tailored to your specific board and equipment. Build consistency through systematic optimization, not guesswork.

The SMT reflow oven is where your thermal profile either delivers clean, reliable joints or creates tombstoning, bridges, and voiding defects that escape inspection and show up in the field at $50 to $200 per return. This guide walks through thermal profiling, equipment types, selection criteria, and the sizing math that separates ovens that run your worst-case board correctly from ones that look great on paper but cost more over time.