3RV2421-4DA15

Product image of Siemens 3RV2421-4DA15 SIRIUS 3RV2 S0 transformer protection circuit breaker
Product image of Siemens 3RV2421-4DA15 SIRIUS 3RV2 S0 transformer protection circuit breaker

The Siemens 3RV2421-4DA15 is an S0 size three-pole circuit breaker with an A-operation overload range of 18...25A and a built-in auxiliary switch for easy status feedback. It has a 400V breaking capacity of 55kA and is suitable for overload and short-circuit protection of small transformer circuits.

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Product image of Siemens 3RV2421-4DA15 SIRIUS 3RV2 S0 transformer protection circuit breaker
Product Positioning

The 3RV2421-4DA15 is a SIRIUS 3RV2 series S0 size transformer protection circuit breaker with an A-operation overload range of 18...25A and a built-in auxiliary switch, suitable for small transformer circuits requiring signal feedback.

Core Product Advantages and Features
Built-in auxiliary switch
This model includes an auxiliary switch that can directly output the circuit breaker trip status signal, facilitating monitoring and feedback from the control system.
Transformer protection dedicated scope
The overload adjustment range of the A-action is 18...25A, corresponding to the rated current requirement of the primary side of a small transformer.
S0 housing with high blocking capacity
The breaking capacity at 400V reaches 55kA, which meets the short-circuit protection requirements of general low-voltage switchboards.
Standardized screw terminals
The three-pole main circuit uses screw terminals for connection and can be mounted on a 35mm DIN rail.
project Specification
model 3RV2421-4DA15
series SIRIUS 3RV2
Casing size S0
use Transformer Protection
A. Action (Overload) Adjustment Range 18...25 A
N-action (short circuit) trip value Approximately 400 A
Rated current 25 A
Rated insulation voltage 690 V
Interrupting capacity Icu@400V 55 kA
Extreme number 3P
Terminal type Screw terminals
Auxiliary switch Built-in (including auxiliary switch)

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