Siemens 3RH1921-1CA10 Auxiliary Contact Block 1 N/O Front Mount

The Siemens 3RH1921-1CA10 is a front-mounted auxiliary contact block designed for use with Siemens 3RH series contactors and overload relays. This compact accessory provides one normally open (1 N/O) auxiliary contact for control circuit applications, allowing you to expand the functionality of your existing contactor assembly.

Key Features:

• Single normally open (N/O) contact configuration for versatile control applications
• Front-mounted design for easy installation and maintenance access
• Compatible with Siemens 3RH series contactors and relay combinations
• Snap-on mounting system for quick, tool-free installation
• Rated for 10A switching capacity at typical control voltages
• Compact profile minimizes panel space requirements
• UL and CSA certified for North American industrial applications

This auxiliary contact block is ideal for interlock circuits, signaling, pilot light control, and other auxiliary switching functions in industrial control panels. The front-mount configuration allows contacts to be added or removed without disconnecting main power connections, reducing installation time and improving serviceability.