Siemens 3RH2911-1HA22 Auxiliary Contact Block 2NO/2NC for Contactors

The Siemens 3RH2911-1HA22 is a front-mounted auxiliary contact block designed for use with Siemens 3RT and 3RH series contactors and overload relays. This compact add-on module provides four auxiliary contacts configured as 2 normally open (NO) and 2 normally closed (NC) contacts, allowing for enhanced control circuit flexibility and system integration.

Key Features:

• Contact configuration: 2 normally open (NO) + 2 normally closed (NC)
• Front-mounting design for easy installation and retrofit applications
• Snap-on attachment to compatible Siemens contactors and relays
• Rated for control circuit voltages and reliable switching performance
• Compact footprint maintains minimal panel space requirements
• Compliant with IEC standards for industrial control applications

This auxiliary contact block expands the control capabilities of Siemens contactors, enabling multiple circuit control, interlocking, signaling, and status indication functions. The front-mount design allows for field installation without disassembling the contactor from the panel. Ideal for industrial automation, motor control panels, and machine control applications requiring additional switching contacts.