Archer M52 Connectors Harwin Archer M52 Connectors are based on 0.46mm square pins and spaced 2.54mm between the rows. M52 Connectors are available in single and double row configurations with SMT and through-hole options. The M52 series has a 1A current rating, 150V voltage rating and an operating temperature of -40°C to +105°C. Typical applications for the M52 series include medical diagnostic & monitoring equipment, telecoms & datacoms, industrial and automotive control & test, retail and point-of-sale equipment, military/aerodynamics, and home security.