770078-1 is a 4-circuit in-line free-hanging plug housing for the 5.0 mm Power Key Connectors (5.0 PKC) wire-to-board connector system. This connector features a compact design with 19.4 mm mated height and 5.0 mm contact centerline spacing, designed specifically for power circuits in home appliances, particularly gas appliances. The housing incorporates a double lock plate for complete contact loading, locking levers surrounded by protective walls to prevent tangling with wires, and design features to release bubbles created during potting processes. The connector is recognized under UL Component Program File No. E28476 and certified by Canadian Standards Association File No. LR7189, ensuring compliance with safety standards for power applications.