Siemens Auxiliary Switch is an essential accessory designed for 3VJ9 IEC framesize 3VJ10 breakers with a 125A capacity. Featuring a 1x changeover contact positioned on the left, this switch enhances operational flexibility and monitoring. It is built to withstand 6kV surge voltage and supports a thermal current of 5A. With a robust mechanical design, it includes screw terminals that require a tightening torque of 0.4–0.5 N·m, ensuring secure and reliable connections.