The 43255-0145 is a 9-circuit pin header from Molex's MLX series, described as a 0.084 Series MLX header. It is a wire-to-board interconnect — the header pins mate with a corresponding MLX receptacle housing that accepts crimp terminals. The 9-position count makes it a mid-size option in the MLX family, suited for power distribution or signal routing where the circuit count matches a 9-way harness. It ships in Tray packaging, which is typical for hand-loading or pick-and-place assembly in production runs.
A critical compliance note: the 43255-0145 is RoHS non-compliant. If your build requires RoHS conformance, this header will not pass — plan for a substitute or an exemption.
The 43255-0145 mates with a 9-circuit MLX receptacle housing (Molex series 43255 or equivalent) that accepts crimp terminals for 14-20 AWG wire. The header pins are keyed to prevent reverse insertion — the housing can only go on one way.