350557-4 is a phosphor bronze pre-tinned socket contact engineered for 5.0 mm Power Key Connectors (5.0 PKC) wire-to-board applications. This contact is specifically designed to accommodate stacked wire configurations with one 18 AWG [1.2 mm²] wire and two 18 AWG [0.8 mm] wires, with a maximum stacked insulation diameter of 2.92 inches. The contact features pre-tin plating for enhanced solderability and reliable electrical connections. It is compatible with HDM applicator part numbers 687898-23 and 687898-43, and hand tool 91504-1, enabling efficient assembly on automated termination equipment. The socket contact is recognized under UL Component Program File No. E28476 and CSA File No. LR7189, making it suitable for power circuits in home appliances, particularly gas appliances, where reliable mating and secure contact retention are essential.