Siemens Auxiliary switch can be mounted on the side, 1NO+1NC Part number 3RV2901-2A

Product Overview

Siemens Auxiliary switch can be mounted on the side, 1NO+1NC (3RV2901-2A) is an auxiliary contact block designed for Siemens SIRIUS 3RV2 motor protection circuit breakers. It provides one normally open and one normally closed auxiliary contact for signalling, control feedback, interlocking or status indication. The unit mounts laterally on the side of the breaker without increasing the installation width, making it ideal for compact control panels and motor starter configurations.

Key Features

• Auxiliary switch for 3RV2 motor protection breakers
• Contact configuration: 1NO + 1NC
• Side-mounted installation — no added device width
• Spring clamp terminals for quick secure wiring
• Rated insulation voltage up to 690 V
• High electrical and mechanical endurance
• Suitable for signalling and control circuit expansion

Technical Specifications

• Article Number: 3RV2901-2A
• Type: Auxiliary Contact Block
• Contacts: 1 NO + 1 NC
• Mounting Position: Side-mounted on 3RV2 breakers
• Compatible Breaker Sizes: S00, S0, S2, S3
• Terminal Type: Spring terminals
• Rated Insulation Voltage: 690 V
• Surge Withstand: 6 kV
• Conductor Size: 0.5 – 2.5 mm²
• Operating Temperature: –20 °C to +60 °C
• Protection Rating: IP20
• Dimensions: approx. 9.5 mm × 90 mm × 68 mm
• Weight: approx. 0.04 kg

Applications

Used to add auxiliary signalling contacts to 3RV2 breakers in automation systems, MCCs and control panels. Ideal for PLC feedback, indication lamps, interlocking circuits, remote trip/ON status monitoring and control logic integration in industrial motor starter assemblies.