Board-to-wire header with a latch that stays put
The 2012010040 is a 4-position, single-row SMD header from the Molex Spot-On 2.0 series, on 2.00 mm pitch. It is a board-to-wire header with a full 4-wall shroud and a latch holder that locks the receptacle in place — no secondary retention needed.
What the latch holder means for your assembly
The latch holder is a positive lock that snaps over the mating receptacle's ramp. It prevents the wire-to-board connection from backing off under vibration or cable tug — a common failure point on plain shrouded headers. No board locks are present, so the latch takes the mechanical load once mated.