Siemens 3RH1921-1EA11 Auxiliary Contact Block 1NO/1NC 2-Pole Side Mount

The Siemens 3RH1921-1EA11 is a 2-pole auxiliary contact block designed for side mounting on Siemens SIRIUS contactors and motor starters. This versatile accessory expands control capabilities by adding one normally open (1NO) and one normally closed (1NC) contact to your existing contactor.

Key Features:

• 1 normally open (NO) and 1 normally closed (NC) auxiliary contact configuration
• Side-mounted design for space-efficient installation
• Compatible with Siemens SIRIUS 3RT and 3RH series contactors
• Tool-free snap-on mounting for quick installation
• Rated for reliable switching in industrial control circuits
• Compact construction allows multiple auxiliary blocks on single contactor

Auxiliary contact blocks are essential for control circuit interlocking, signaling, and feedback applications. The 3RH1921-1EA11 provides additional switching contacts without requiring a larger contactor, making it ideal for complex motor control panels, machine automation systems, and industrial control applications where multiple circuit switching is required.