Siemens 3RH1921-1CA01 Auxiliary Switch Block 1NO/1NC Front Mount

The Siemens 3RH1921-1CA01 is a front-mounted auxiliary switch block designed for use with Siemens 3RH contactors and relays. This compact add-on module expands the switching capability of compatible control devices by providing additional contact configurations for control circuit applications.

Key Features:

• Contact configuration: 1 normally open (NO) and 1 normally closed (NC) contact
• Front mounting design for easy installation and access
• Compatible with Siemens 3RH series contactors and control relays
• Snap-on attachment for quick, tool-free installation
• Rated for control circuit voltages up to 600V AC/DC
• Contact current rating: 10A at AC-15 duty
• Compact design minimizes panel space requirements
• UL and CSA certified for North American applications

This auxiliary switch block is ideal for expanding control capabilities in industrial automation, motor control, and machine control applications where additional signaling or interlocking contacts are required. The front-mount design allows for installation without removing the main contactor from the panel.