Board-Edge Wire-to-Board Header for 3-Circuit Harnesses
For higher reconnect duty, gold-plated alternatives in the MTA-100 family should be considered.
Pitch, Orientation, and Locking for Harness Reliability
The single-row, 3-position configuration keeps the connector narrow, suiting it for dense PCB layouts where board edge space is at a premium. The friction lock provides a positive retention force without requiring a separate latch or screw — the mating receptacle snaps onto the header and is held by the interference fit. This is sufficient for moderate vibration environments but not for high-shock applications where a secondary lock would be needed.
Comparison with Peer 1-1871673-2
The 3-647630-3 is a single-row, 3-position part with a friction lock and a 0.100" pitch — the two are not pin-compatible and serve different board layouts. The 1-1871673-2 includes a board lock for SMT reflow retention, while the 3-647630-3 relies on through-hole solder joints for mechanical retention. For a 3-circuit board-edge application, the 3-647630-3 is the correct MTA-100 choice.