3RH1921-1EA11 SIEMENS

The 3RH1921-1EA11 auxiliary switch block from Siemens is designed to enhance the functionality of motor contactors within sizes S0 to S12. This side-mounted auxiliary switch block conforms to EN 50005 standards, ensuring reliability and safety in industrial applications. Featuring a 2-pole configuration, it provides one normally open (NO) and one normally closed (NC) contact, enabling versatile control circuit designs. The 10 mm wide block is easily installed on the side of compatible contactors, saving valuable panel space. Screw terminals facilitate secure and straightforward wiring connections, reducing installation time and ensuring stable electrical connections. As a 1st lateral auxiliary switch, it expands the control capabilities of the main contactor, allowing for additional interlocking or signaling functions. This auxiliary switch block is ideal for applications requiring supplementary control circuits, such as motor starting, stopping, or protection. Its robust design and adherence to international standards make it a dependable component in diverse industrial environments. By adding this auxiliary switch, users can create more complex and efficient control systems.