770170-1 is a vertical pin header connector designed for PC board mounting with 3 circuits in an in-line configuration. It features a dimension A of 0.550 inches (13.97 mm) and is available with tin or duplex plating options. The connector is compatible with Mini-Universal MATE-N-LOK plug housings and supports both drain hole and non-drain hole configurations. This connector is commonly used in applications requiring reliable board-to-wire interconnections with secure mating and unmating cycles, offering flexibility in pin finish selection to meet various environmental and performance requirements.