3RA1931-1BA00

The 3RA1931-1BA00 is an S2-size electromechanical connection module that can combine a 3RV1.31 circuit breaker and a 3RT1.3 contactor into one unit. It is a three-pole module suitable for DC operation and is a commonly used connection accessory for MSP starters.

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Siemens 3RA1931-1BA00 SIRIUS S2 Connector Module Product Photo

Product Positioning

The 3RA1931-1BA00 is a Siemens SIRIUS series S2 size electrical and mechanical connection module used to combine the 3RV1.31 motor starting protection circuit breaker and the 3RT1.3 contactor into a single starter.

Core Product Advantages and Features

Electromechanical double connection

The mechanical fixing and electrical connection between the circuit breaker and the contactor are completed simultaneously.

Supports DC operation

Circuit breaker and contactor combination designed specifically for DC control circuit applications.

Three-pole structure

The three-pole connection configuration required for the start-up protection of a three-phase motor.

Corresponding to S2 size series

It can be used directly with the 3RV1.31 circuit breaker and the 3RT1.3 contactor.

project	Specification
Product Model	3RA1931-1BA00
Product Type	Circuit breaker contactor electromechanical connection module
Applicable circuit breakers	3RV1.31
Applicable contactors	3RT1.3
Applicable size	SIRIUS S2
Extreme number	3 poles
Operation method	DC operation
Product Status	The original manufacturer has listed it as discontinued; the recommended alternative is model 3RA2931-1AA00.
Applicable series	SIRIUS Modular Control System (MSP Starter)
RoHS compliant	Compliant with regulations since July 1, 2006

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3RA1931-1B

The 3RA1931-1B is commonly found in dealer catalogs, designated as an S2 specification DC operating connection module. It's used with a 3RV1.31 circuit breaker and a 3RT1.3 contactor to form a motor starting device. Some documentation uses the full model number 3RA1931-1BA00 for this part; for detailed specifications, please contact us for confirmation.

3RA1931-1AA00

The 3RA1931-1AA00 is an S2 specification AC operating connection module used to combine the 3RV1.31 motor protection circuit breaker with the 3RT1.3 contactor. It is also compatible with the 3RW3 soft starter. Packaged as a single unit, it is suitable for various motor starting combination applications.