Rated 15 A per circuit at 250 VAC, this is a genuine power header — sized for a DC distribution rail, a motor drive feed, or a power supply output, not a signal line.
Against the 4-position, 2-row 1-1871673-2 (0.098" pitch, 2.50 mm), the 770846-1 runs a wider 5.08 mm pitch in a single row — the board footprint is larger per circuit, but the wider pitch gives more creepage for the 250 VAC rating and simplifies manual routing. The 1-1871673-2 uses a UL94 V-0 housing and square pins, while the 770846-1 uses circular pins and UL94 V-2 — the choice between them depends on whether the application requires a V-0 flammability rating and a denser dual-row footprint.
Board lock and board guide are integrated into the header.