Siemens 3RV2901-2E SIRIUS Auxiliary Switch 1NO+1NC Spring Terminal

The Siemens 3RV2901-2E is a transverse auxiliary switch from the SIRIUS range, designed to plug directly onto Siemens 3RV2 circuit breakers in sizes S00, S0, S2, and S3. It delivers one normally open and one normally closed instantaneous contact via spring-loaded terminals, enabling fast, tool-free wiring in control panels. The unit holds CE, UL, CSA, and CCC certifications for international use.

Technical specifications:

• MLFB: 3RV2901-2E
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Transverse auxiliary switch
• Contact arrangement: 1 NO + 1 NC (instantaneous)
• Compatible circuit breakers: Siemens 3RV2, sizes S00, S0, S2, S3
• Terminal type: Spring-loaded terminals
• Conductor cross-section: 0.5-2.5 mm² solid/stranded, AWG 20-14
• Insulation voltage: 300 V
• Surge voltage: 4 kV
• Operational current AC-12: 2.5 A at 24 V and 230 V
• Operational current AC-15: 2 A at 24 V / 0.5 A at 230 V
• Operational current DC-13: 1 A at 24 V / 0.3 A at 48 V / 0.15 A at 60 V
• IP rating: IP20 on front (IEC 60529), finger-safe
• Pollution degree: 3
• Operating temperature: -20 to +60 °C
• Storage temperature: -50 to +80 °C
• Fastening: Plug-in
• Dimensions (W x H x D): 45 x 13 x 17 mm
• Weight: 17 g
• Certifications: CE, UL, CSA, CCC

Features and benefits:

• Transverse plug-in fixing mounts directly onto 3RV2 circuit breakers across four frame sizes (S00, S0, S2, S3)
• Spring-loaded terminals accept 0.5-2.5 mm² conductors, including dual conductors per terminal
• IP20 finger-safe front protection (IEC 60529) for safe access during panel commissioning
• Wide operating range of -20 to +60 °C suits demanding industrial environments
• CE, UL, CSA, and CCC approvals support global machine builds and exports
• Compact 45 x 13 x 17 mm footprint and 17 g weight minimise space and load on the breaker

Applications:

• Adding signal or interlock contacts to Siemens 3RV2 motor starter protectors
• Status feedback wiring in motor control centres and distribution panels
• Safety interlocking circuits in industrial machinery using 3RV2 breakers
• Auxiliary contact signaling in switchgear assemblies requiring 1 NO + 1 NC feedback

Certified to CE / UL / CSA / CCC; IP20 rated per IEC 60529. Part of the Siemens SIRIUS 3RV29 auxiliary switch range.

Also known as: Siemens 3RV2901-2E, SIRIUS 3RV29 transverse auxiliary switch, 3RV2 auxiliary contact block 1NO 1NC.