3RA21204BA260BB4
The Siemens SIRIUS 3RA2120-4BA26-0BB4 is an S0-size load feeder assembly that integrates a motor starter protection circuit breaker and contactor as a pre-assembled direct start unit. It has a short-circuit breaking capacity of up to 150kA, a control voltage of 24V DC, 1NO+1NC auxiliary contacts, IP20 protection, and is suitable for DIN rail or busbar system installation.
Product Positioning
The 3RA2120-4BA26-0BB4 is a SIRIUS 3RA21 series S0 size load feeder assembly that integrates a motor starting protection circuit breaker and a contactor into a pre-assembled direct starting unit, suitable for simplified configuration of small and medium-sized motor circuits.
Core Product Advantages and Features
Integrated circuit breaker and contactor
The motor starting protection circuit breaker and contactor have been assembled and verified before leaving the factory, making installation more time-saving and labor-saving.
150kA high interrupting capacity
The short-circuit breaking capacity is up to 150kA, and it meets both Harmonized Type 1 and Type 2 specifications.
24-volt DC control voltage
The control loop adopts a 24-volt DC design, which facilitates integration into common DC control systems.
S0 size series specifications are consistent
It belongs to the SIRIUS S0 size load feeder family, which facilitates wiring planning with other products in the same series.
Durable, reliable, long lifespan
With a maximum mechanical operation life of 10 million cycles and IP20 protection, it is suitable for long-term stable operation.