Siemens 3RV2901-1A SIRIUS Auxiliary Switch 1NO+1NC Screw Terminal

The Siemens 3RV2901-1A is a lateral auxiliary switch from the SIRIUS range, designed to mount on the side of 3RV2 circuit breakers in sizes S00, S0, S2, and S3. It delivers 1 NO and 1 NC instantaneous contacts via screw terminals, enabling status signaling and control circuit integration directly at the breaker.

Technical specifications:

• MLFB: 3RV2901-1A
• Manufacturer: Siemens
• Product line: SIRIUS
• Product type: Lateral auxiliary switch
• Compatible circuit breakers: 3RV2, sizes S00, S0, S2, S3
• Contact arrangement: 1 NO + 1 NC, instantaneous
• Insulation voltage: 690 V
• Surge voltage: 6 kV
• AC-12 operational current: 10 A (24-690 V)
• AC-15 operational current: 6 A at 24 V, 4 A at 230 V, 3 A at 400 V, 1 A at 690 V
• DC-13 operational current: 2 A at 24 V, 0.5 A at 110 V, 0.25 A at 220 V
• IP rating: IP20 (front, per IEC 60529)
• Operating temperature: -20 to +60°C
• Storage temperature: -50 to +80°C
• Mounting: plug-in fixing
• Terminal type: screw-type
• Conductor cross-section: 0.5-2.5 mm² (solid, stranded, finely stranded with core end processing)
• AWG: 20-14
• Pollution degree: 3
• Dimensions (W x H x D): 9.5 x 90 x 70 mm
• Certifications: CE, UL, CSA, CCC

Features and benefits:

• Side-mount plug-in design for fast installation on 3RV2 circuit breakers
• 1 NO + 1 NC instantaneous contacts for flexible wiring configurations
• Compatible across four 3RV2 frame sizes: S00, S0, S2, and S3
• Finger-safe IP20 front protection per IEC 60529
• Screw terminals accept 0.5-2.5 mm² conductors including AWG 20-14
• International approvals - CE, UL, CSA, and CCC - for global deployment

Applications:

• Status feedback signaling in motor starter protection circuits
• Control circuit interlocking with 3RV2 motor starter protectors
• PLC digital input connection for circuit breaker position indication
• Remote ON/OFF/TRIP state indication in automation panels
• Auxiliary contact expansion in motor control centers

Certified CE, UL, CSA, and CCC. Part of the Siemens SIRIUS 3RV29 range.

Also known as: Siemens 3RV2901-1A, SIRIUS 3RV29 lateral auxiliary switch.