The Molex 5056051203 is a 12-circuit, 2-row receptacle housing from the CP-3.3 505605 series, designed for wire-to-board or wire-to-wire power and signal interconnects. It uses a 3.30mm pitch — wider than 2.54mm headers but tighter than 3.96mm power connectors — balancing contact density with creepage for moderate-voltage harnesses.
What mates with the 5056051203 and what terminals does it take?
The matching plug is the male pin header from the same CP-3.3 series; the latch holder provides a positive lock against vibration, so the pair stays mated without a secondary clip. Because the housing ships without contacts, you need to order the compatible Molex CP-3.3 female crimp terminal separately — that part number is not listed here but is the standard CP-3.3 socket for 20-24 AWG wire.