12-position, 1.50 mm pitch — not a 0.100" header
The 5031591200: This is a 12-circuit, single-row receptacle on 1.50 mm pitch — not the 2.54 mm you might expect from a legacy wire-to-board connector. The tighter pitch saves board real estate but demands a matching 1.50 mm header; a 0.100" header will not mate. Tin works well when the mated pair stays undisturbed; for frequent reconnects, consider the gold-plated sibling in the same series.
Latch holder and board guide lock the pair
The board guide aligns the receptacle during assembly, taking shear off the contacts before the latch engages. The through-hole kinked-pin termination provides stronger solder-joint retention than a straight pin in high-vibration environments — the kink resists pull-out forces from the cable side.
Rated for automotive and industrial thermal profiles
Molex lists applications including Automotive, General Purpose, Industrial, Lighting, and Medical — the part is qualified for those sectors, not just a general-purpose part that might work.