SIEMENS Auxiliary Switch Block 2NO+2NC, Size S00/S0, Screw Terminal, 3RH2911 Series 3RH29112GA22

In a busy control panel, an electrician needs to add auxiliary contacts to a SIEMENS S00 or S0 contactor for status feedback and interlocking. The SIEMENS 3RH29112GA22 auxiliary switch block snaps directly onto the front of the contactor, providing two normally open and two normally closed contacts. This compact module eliminates the need for separate relays and simplifies wiring, making it a practical choice for motor control circuits, automation systems, and machine building.

Key specifications

• Contact configuration: 2 NO + 2 NC (2S + 2Ö)
• Mounting: Front mounting on contactor size S00 or S0
• Connection: Screw terminals
• Series: SIEMENS 3RH2911 auxiliary switch block
• Model: 3RH29112GA22
• Brand: SIEMENS

Why choose it

This auxiliary switch block is engineered for reliable performance in demanding industrial environments. Its front-mount design allows quick installation without tools, reducing downtime during panel assembly or maintenance. The combination of two NO and two NC contacts offers flexibility for control logic, signaling, and safety circuits. Built to SIEMENS quality standards, it ensures long-term durability and consistent switching performance.

Ideal use cases

• Adding auxiliary contacts to SIEMENS contactors for motor starters
• Providing status indication in control circuits
• Implementing electrical interlocking in reversing starters
• Expanding contact capacity in automation panels

Good to know

The 3RH29112GA22 is compatible with SIEMENS contactors of size S00 and S0, such as the 3RT2 series. It features screw terminals for secure and vibration-resistant connections. The block is designed for front mounting, allowing easy access and replacement. Always verify compatibility with your specific contactor model before installation.