3VA9978-0AA23 SIEMENS

The 3VA9978-0AA23 from Siemens is a crucial electronic component designed as an accessory for 3VA4, 3VA5, and 3VA6 series molded case circuit breakers (MCCBs). This leading changeover switch facilitates seamless transfer between power sources, ensuring uninterrupted operation in critical applications. Featuring high-quality (HQ) changeover contacts with a 7mm contact gap, it guarantees reliable switching performance and enhanced safety. The electronic-compatible design ensures smooth integration with modern control systems, optimizing overall system efficiency. This accessory is essential for applications requiring redundant power supplies or automatic transfer schemes. Its robust construction and precise engineering ensure long-lasting durability and dependable operation. The 3VA9978-0AA23 simplifies the implementation of changeover functionality, reducing installation time and complexity. By providing a reliable and efficient means of switching between power sources, it enhances the resilience and availability of electrical systems. This changeover switch is an indispensable component for maintaining continuous power supply in critical infrastructure and industrial processes.