350837-4 is a socket header connector designed for the 5.0 mm Power Key Connector (5.0 PKC) wire-to-board system, specifically configured as a long tail variant for use with 0.125 inch (3.18 mm) thick PCB boards. This 15-circuit connector features a duplex finish with 0.000030 inch minimum gold plating in the mating area and matte tin on the solder tail end over 0.000050 inch minimum nickel underplate on the entire contact. The connector has an A dimension of 1.300 inches (33.02 mm) and is rated UL94V-0 for flammability. The product is designed for power circuit applications in home appliances, particularly gas appliances, and is recognized under UL Component Program File No. E28476 and CSA File No. LR7189. This connector integrates with the 5.0 PKC system's double lock plate design and protective walls around locking levers to ensure secure contact loading and prevent wire tangling.