The 5164711-3: The 2.50mm pitch sets the board footprint — a 0.098" centerline spacing that matches standard Mini-Match male headers. The 3-position single-row layout is keyed by the friction lock, so it only mates one way. Right-angle through-hole termination means the receptacle sits perpendicular to the PCB surface, useful for board-edge or parallel-board routing where z-height is tight.
How This Compares to Sibling Parts
The 1376775-3 (3-position, gold-plated) and 1376775-2 (5-position, gold-plated) are from a different TE series with 250VAC rating and square contacts — the tin finish on 5164711-3 is the trade-off for lower cost at moderate cycle life.