3RH1921-2HA22 SIEMENS

The 3RH1921-2HA22 auxiliary switch block from Siemens is designed to enhance the functionality of motor contactors. This 4-pole auxiliary switch block features a combination of normally open (NO) and normally closed (NC) contacts, specifically 2 NO and 2 NC, providing versatile switching options for control circuits. It adheres to EN 50012 standards, ensuring compliance with established safety and performance requirements. The spring-type connection system facilitates quick, reliable, and vibration-resistant electrical connections, reducing installation time and maintenance efforts. This auxiliary switch block is suitable for use with motor contactors, expanding their control capabilities. It allows for the integration of additional control and signaling functions within motor control systems. The 3RH1921-2HA22 is ideal for applications requiring dependable auxiliary switching, such as interlocking, signaling, and monitoring circuits. Its robust design and reliable connections ensure consistent performance in demanding industrial environments. By adding this auxiliary switch block, users can enhance the control and monitoring capabilities of their motor contactors.