5.00 mm pitch, 4-position, single-row header
The 9-1971845-4 is a 4-position, single-row header from TE Connectivity's 1971845 series, designed for board-to-cable/wire applications. The header is shrouded on all four walls, which protects the mating tabs during handling and guides the receptacle into alignment. A latch holder provides positive retention against vibration — the lock engages audibly when the mating half is fully seated.
Temperature range and flammability rating
Rated for -40°C to 120°C, the header can be used in industrial cabinets, outdoor telecom enclosures, and underhood automotive compartments where the ambient temperature cycles. The 250 VAC voltage rating is a conservative ceiling for the insulation system; in practice, the header is suited for low-voltage power distribution and signal interconnect within that envelope.