What this 4-position breakaway header does in a board stack
The breakaway feature means the header can be snapped to length if needed, though this part comes pre-loaded with all 4 positions. The tin-plated posts handle the solder joint.
Voltage rating is 250 VAC — adequate for low-power signal and control circuits within an enclosure. Insulation height is only 0.059" (1.50 mm), keeping the profile low above the PCB.
SMT termination and assembly fit
Surface mount termination (SMT) suits reflow soldering. The unshrouded design means the pick-and-place nozzle has clear access, and there are no walls to trap flux or cause tombstoning.