3RA1931-1B

Siemens 3RA1931-1B SIRIUS S2 connection module physical diagram
Siemens 3RA1931-1B SIRIUS S2 connection module physical diagram

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.

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Siemens 3RA1931-1B SIRIUS S2 connection module physical diagram
Product Positioning

The 3RA1931-1B is listed as the SIRIUS connection module in the catalogs of many distributors. It is used to assemble the 3RV1.31 circuit breaker and the 3RT1.3 contactor into one unit. A DC-operated version is available, suitable for S2 specification motor starters.

Core Product Advantages and Features
Electrical and mechanical connections
The circuit breaker and contactor are fixed and connected synchronously, eliminating the need for additional wiring steps.
DC Operation Version
To expand the selection flexibility for DC coil contactor applications.
S2 specification corresponds to
Designed specifically for the S2 size combination of 3RV1.31 and 3RT1.3.
Streamline installation space
Modular connection methods shorten assembly time and reduce the risk of wiring errors.
project Specification
model 3RA1931-1B
Product Type Connection Module (Electrical and Mechanical)
Applicable circuit breakers 3RV1.31 series
Applicable contactors 3RT1.3 series
Applicable starters 3RW3 Series (Partial Information)
Operation method DC operation
Corresponding specifications S2
Packaging quantity 5 pieces/pack (some distributors list it as a single piece)
net weight Approximately 0.034 kg
country of origin Romania
RoHS conform to

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