12-Circuit Plug Housing for 4.20 mm Wire-to-Wire Systems
The Molex 0039013123 is a 12-position plug housing from the Mini-Fit Jr 5559 series, built for wire-to-wire and wire-to-board power interconnects where 4.20 mm pitch keeps the board footprint compact while maintaining enough creepage for moderate-voltage DC rails.
In a harness that routes near an engine block or through a chassis frame, that positive lock keeps the terminals from backing out.
Contacts Not Included — Order the Crimp Terminal Separately
This housing ships empty. For the receptacle side, the matching Mini-Fit Jr 5559 receptacle housing (dual-row, same 4.20 mm pitch) completes the wire-to-wire pair.
No obsolescence notice or successor part is on record. Supply is confirmed at quote time against the BOM quantity through independent distribution.