3RV2021-4DA20

The Siemens SIRIUS 3RV2021-4DA20 motor protection circuit breaker has a housing size of S0, a current adjustment range of 18~25A, a rated operating current of 25A, and spring-loaded terminals. It is suitable for motor overload and short-circuit protection circuits.

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Product Positioning

The 3RV2021-4DA20 is a Siemens SIRIUS series S0 case motor protection circuit breaker with a current adjustment range of 18~25A. It is equipped with spring-loaded terminals and provides stable motor overload and short-circuit protection.

Core Product Advantages and Features

Thermal overload protection

The trip value of the thermal element can be adjusted within the range of 18~25A, corresponding to the actual rated current of the motor, to avoid long-term overload damage.

Electromagnetic instantaneous short circuit trip

When the short-circuit current reaches the set value, the electromagnetic trip unit immediately cuts off the main circuit to protect the line and surrounding equipment.

Spring-loaded terminal blocks

The main circuit uses spring-loaded terminals, which can securely clamp the wires without screws, thus speeding up the wiring efficiency.

Standard rail installation

It can be snapped onto a 35mm standard DIN rail and can be installed in any direction, increasing the design flexibility of the distribution box.

project	Specification
Product Type	SIRIUS 3RV2 Series Motor Protection Circuit Breaker (Motor Starting Protector)
Casing size	S0
Extreme number	3P
Break away from level	CLASS 10
Rated insulation voltage	690V AC (Pollution Level 3)
Short-circuit breaking capacity Icu	240V:100kA / 400V:55kA / 500V:10kA / 690V:4kA
Protection level	IP20
Installation method	35mm standard guide rail (DIN EN 60715), screw fixing + snap-on installation.
Applicable Standards	IEC/EN 60947-4-1
Current adjustment range	18...25 A
Rated operating current (AC-3)	25 A
Instantaneous short-circuit tripping current (N-release)	325 A
Terminal type	Spring-loaded terminal blocks
External dimensions (height x width x depth)	119 x 45 x 97 mm
weight	Approximately 0.389 kg

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