The Molex Mini50 0349590383 is a 38-position receptacle housing from the 34959 series, laid out in three rows on a 2.00 mm pitch. That pitch is tight enough to save board real estate in a dense harness but still leaves room for 20-22 AWG wire routing in the cavity. The 38 circuits match a 38-way header — verify your BOM line count against this number before committing the line item. The latch lock with Connector Position Assurance (CPA) gives a positive secondary lock that resists vibration-induced separation, which is the whole point of the Mini50 family in automotive and industrial harnesses.
The 0349590383 mates with a Mini50 34959 series header of the same 38-position, 3-row, 2.00 mm pitch layout. The header will have the male pin terminals; this housing carries the female sockets. For the contacts themselves, you need the matching Molex Mini50 female socket crimp terminal — the housing does not include them, and the listing note makes that explicit. Standard Mini50 terminals accept 20-22 AWG wire; use the manufacturer's crimp tool and inspection gauge to hit the specified pull-force.
It is ROHS3 compliant.