770190-1 is a vertical pin header connector designed for high-density interconnect applications with 15 matrix-style circuits. The connector features a duplex finish with gold plating in the mating area and tin plating in the crimping area over a nickel underplate, providing excellent corrosion resistance and reliable electrical contact. The A dimension is 0.877 inches (22.28 mm), and it is compatible with Mini-Universal MATE-N-LOK plug housings using socket contacts. This connector is commonly used in telecommunications, industrial control systems, and computer peripheral applications where compact, reliable multi-circuit connections are required.