Siemens U07MN64A U 24DC Electromechanical Relay

Siemens U07MN64A is a 24 V DC undervoltage release accessory designed for Sentron molded‑case circuit breakers in the ND/MD/RD frame families. This UVR attaches inside the breaker assembly to monitor the control voltage and, under undervoltage conditions, initiates tripping or signaling of the protection scheme, helping ensure safe shutdown of connected equipment when supply voltage falls below the set point. The U07MN64A version includes one auxiliary switch to provide a signaling contact for remote monitoring or interlocking; if you need two auxiliary contacts, the U07MN64AA variant is available. The device is intended for use with Siemens' MD/ND/RD frame breakers and is part of the Sentron protection lineup, compatible with 24 V DC control circuits typically used in industrial control panels and motor control centers. Applications include industrial automation cabinets where undervoltage protection and auxiliary feedback are required for coordinated protection and control logic.