20-pin 1.50mm pitch vertical header with detent lock
Rated for 50VAC, with current dependent on the attached wire gauge.
This header accepts the Mini CT crimp receptacle housing and matching terminal. The detent lock engages with the receptacle's locking ramp — if it backs out under tension, check that the terminal is fully seated in the housing before blaming the header.
The Mini CT at 1.50mm pitch packs 20 positions into a shorter board footprint. Both use tin contacts and a detent lock, but the CT part mates with a different receptacle series — verify the mating half before swapping.