The TE Connectivity 4-1971896-4 is a 4-position, single-row, shrouded header on a 5.00 mm pitch — a board-to-wire power interconnect rated for 20 A per circuit at 250 VAC. Silver plating on both the mating tab and the solder post keeps contact resistance low for the current level, but silver is softer than gold — expect the mating cycle life to be adequate for a one-time assembly or field-service reconnect, not a daily unplug cycle.
It also carries a glow wire compliant designation, which means the housing material passes the IEC 60695-2-11 glow-wire test at the relevant temperature. That compliance is a gate for white goods, HVAC controls, and similar appliance applications where the connector sits near a potential ignition source.
This is a through-hole header with a 4-wall shroud and a latch holder fastening system. The insulation height is 0.504" (12.80 mm).