The 1-1734101-4 is a CHAMP Series I board-to-board receptacle connector featuring 160 positions arranged in 4 rows with a 1.27 mm centerline pitch and 1.904 mm row-to-row spacing. This vertical-mount connector is constructed with a PPA resin housing in black and utilizes phosphor bronze socket contacts with gold flash plating on the mating area and tin plating on the solder tails. The connector supports a maximum contact current rating of 1 A, operates across a temperature range of -55°C to +85°C, and provides a dielectric withstanding voltage of 750 VAC with 250 VAC rated voltage and 1000 MO insulation resistance. It features through-hole termination with 2.54 mm termination post length, boardlock retention, and locating posts for secure PCB mounting on recommended board thicknesses of 0.8–1.6 mm. This connector is ideal for high-density interconnect applications in computing, telecommunications, and industrial equipment where reliable board-to-board signal and power distribution is required.