Siemens Auxiliary Switch 2 NO, Lateral Mount for 3RV2 Circuit Breakers S00/S0 - 3RV29012B

Circuit breakers alone cannot always signal their switching state or provide auxiliary control contacts. The Siemens 3RV29012B auxiliary switch solves this by adding two normally open (NO) contacts to compatible Siemens 3RV2 circuit breakers in frame sizes S00 and S0. It mounts laterally without tools, enabling remote status indication, interlocking, or control of secondary circuits.

Who is it for

This auxiliary switch is intended for panel builders, machine OEMs, and maintenance technicians who need reliable auxiliary signaling from motor starter protectors and circuit breakers. It suits industrial control panels, motor control centers, and machinery where breaker status must be monitored or used to control other devices.

Main features

• 2 normally open (NO) contacts for status signaling or control.
• Lateral mounting on Siemens 3RV2 circuit breakers, sizes S00 and S0.
• Screw terminals for secure wiring.
• Rated insulation voltage 690 V and impulse withstand 6 kV.
• Operational current up to 6 A at 230 V AC-15 and 10 A at 24 V DC-13.
• Wide ambient operating temperature range from -20 °C to +60 °C.
• High electrical and mechanical endurance of 10 million switching cycles.

Specifications

• Product type: Auxiliary switch
• Contact configuration: 2 NO
• Mounting: Lateral (side-mounted)
• Compatibility: Siemens 3RV2 circuit breakers, sizes S00 and S0
• Connection: Screw terminals
• Rated insulation voltage (Ui): 690 V
• Rated impulse withstand voltage (Uimp): 6 kV
• Rated operational current AC-15, 230 V: 6 A
• Rated operational current AC-15, 400 V: 3 A
• Rated operational current DC-13, 24 V: 10 A
• Operating frequency: 50/60 Hz
• Degree of protection, front: IP40
• Degree of protection, terminals: IP20
• Ambient operating temperature: -20 °C to +60 °C
• Ambient storage temperature: -50 °C to +80 °C
• Electrical endurance: 10,000,000 switching cycles
• Mechanical endurance: 10,000,000 switching cycles
• Short-circuit protection fuse gL/gG: 10 A

Tips

Verify that your circuit breaker is a Siemens 3RV2 model in size S00 or S0 before ordering. The switch snaps onto the side of the breaker without additional wiring to the main contacts. For applications requiring normally closed contacts, consider a different auxiliary switch variant.