Board-to-wire header for power distribution — 15 circuits on a 6.35 mm grid
The 641975-1 is a through-hole, shrouded header from TE's Universal MATE-N-LOK series, built for board-to-cable/wire interconnects that carry higher current than a typical signal header. Its 0.250" (6.35 mm) pitch and triple-row layout pack 15 positions into a natural nylon housing with a 0.550" (13.97 mm) insulation height — enough standoff to clear bulky components underneath on the PCB. The locking ramp fastening keeps the mated pair from backing loose under machine-mounted shock or transport vibration.
The base product number is 641975; this specific variant is the 15-position, gold-plated, through-hole version in tray packaging. No pin-compatible cross-reference or successor is recorded — the Universal MATE-N-LOK family shares the same pitch and locking ramp, so a different position count or plating option would be a different base part.
Mating with Universal MATE-N-LOK receptacles — what fits
The 4-wall shrouding and board guide on the header align the receptacle during mating and protect the pins from damage if the connector is plugged in blind. No secondary lock is needed — the ramp alone holds the pair mated under normal vibration levels.
Board layout notes — footprint and keep-out
The through-hole solder tails are tin-plated, 0.155" (3.94 mm) long — enough for a standard 0.062" (1.6 mm) PCB with the tail protruding for a good solder fillet. Row spacing is 0.250" (6.35 mm), matching the pitch, so the footprint is a 3×5 grid on 6.35 mm centers. The UL94 V-2 nylon housing is rated for flame retardance in equipment inside an enclosure — it will self-extinguish within the UL test window, but it's not V-0, so it's not suited for open-air or high-fire-risk installations without additional enclosure protection.