3VA9978-0AA12 SIEMENS

The 3VA9978-0AA12 auxiliary switch from Siemens is a crucial accessory designed to enhance the functionality and monitoring capabilities of 3VA4, 3VA5, and 3VA6 molded case circuit breakers (MCCBs). This high-quality auxiliary switch features changeover contacts, enabling versatile signaling and control options within electrical systems. With a compact HQ type design and a 7mm width, it seamlessly integrates into the MCCB assembly without adding significant bulk. The auxiliary switch provides reliable indication of the circuit breaker's status, such as open, closed, or tripped, allowing for remote monitoring and control. This information can be used to trigger alarms, interlocks, or other control functions, improving system safety and efficiency. The 3VA9978-0AA12 auxiliary switch is essential for applications requiring advanced monitoring and control of circuit breaker operations. Its robust design ensures reliable performance in demanding industrial environments. By providing real-time status updates, this auxiliary switch enables proactive maintenance and reduces downtime. It is an indispensable component for optimizing the performance and reliability of electrical distribution systems.