2.50mm pitch, 3-position shrouded header for wire-to-board
The 3-1971798-1: This is a 3-position, single-row, vertical through-hole header from TE's Grace Inertia GIC series. The 2.50mm pitch sets the board footprint — it mates with the matching GIC receptacle housing for a wire-to-board interconnect. The 4-wall shroud protects the square male pins during blind mating and prevents bent contacts in tight enclosures. Rated current varies by wire gauge — the limiting factor is the termination crimp and wire size, not the header itself. The tin-on-tin contact interface is rated for standard signal and low-power duty cycles; gold is not specified here, so expect fewer mating cycles than a gold-plated equivalent. The latch holder fastening type locks the header to the receptacle, giving positive retention under vibration. In a packaging line or conveyor control cabinet where the connector sees machine shake, that latch keeps the pair mated without additional hardware.