2.50 mm pitch, 5-position, single-row header
The 5-1971798-1: This is a 5-position, single-row header from TE's Grace Inertia (GIC) series, designed for board-to-cable/wire connections. The 2.50 mm pitch sets the PCB footprint and the mating half position count — a common spacing for low-voltage signal and moderate-current power distribution. A board guide on the header assists alignment during assembly, reducing pin damage risk.
Tin-plated contacts, 50 V ceiling
Both the mating and post contact finishes are tin. Tin is a cost-effective choice for moderate mating cycles (typically 25–50 cycles) in controlled environments; it is not suited for high-frequency mating or corrosive atmospheres where gold would be specified. The voltage rating is 50 V, which limits this header to low-voltage applications — signal lines, sensor interfaces, or low-power DC distribution. Current rating is listed as varying by wire gauge, so the actual ampacity depends on the terminal and wire size used in the mating half.
Peer comparison: pitch and position count
Compared to the CT series header 1-292164-1 (11 positions, 2.00 mm pitch, 125 VAC, detent lock), the Grace Inertia part offers a wider 2.50 mm pitch and a latch holder instead of a detent lock, trading position density for a more positive locking mechanism.