3RA1921-1BA00
The 3RA1921-1BA00 is an S0 specification 3-pole connection module that supports DC operation. It is used to combine the 3RV1.2 motor protection circuit breaker and the 3RT1.2 contactor into a single starter, suitable for DC control circuit applications.
Product Positioning
The 3RA1921-1BA00 is a SIRIUS series connection module, available in a DC-operated version. It integrates the 3RV1.2 circuit breaker and 3RT1.2 contactor into a single starter and is compatible with S0 specifications.
Core Product Advantages and Features
3-pole electrical connection
Synchronous series connection of the three-pole main circuit eliminates the need for manual wiring.
DC Operation Version
Corresponding DC coil contactor and DC control circuit.
S0 specification corresponds to
Designed specifically for the S0 size combination of 3RV1.2 and 3RT1.2.
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3RA1921-1D
The 3RA1921-1D is a screw-type connection module used to assemble and fix an S0 specification 3RV1.21 circuit breaker and an S00 specification 3RT1.1 contactor into one unit. It is suitable for panel configuration of small motor direct starter.
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3RA1921-1AA00
The 3RA1921-1AA00 is an S0 specification AC operating connection module used to connect and fix the 3RV1.21 motor protection circuit breaker with the 3RT1.2 contactor. It is also compatible with the 3RW3 soft starter and is suitable for starting panels in AC control circuits.
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3RA1916-4BA31
After extensive investigation, no corresponding information for the 3RA19 prefix item 3RA1916-4BA31 was found in publicly available dealer directories or Siemens databases. The only known instance is the suffix 4BA31, which is commonly found in the 3RT19 series parallel connectors. Whether these two are related remains unconfirmed.