3RV2021-4DA10

Siemens SIRIUS 3RV2021-4DA10 motor protection circuit breaker, housing size S0, current adjustment range 18~25A, rated operating current 25A, screw-type terminal design, suitable for overload and short circuit protection in motor starting circuits.

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Product Positioning

The 3RV2021-4DA10 is a Siemens SIRIUS series S0 case motor protection circuit breaker with a current adjustment range of 18~25A. It is equipped with screw-type terminals and provides stable and reliable motor overload and short circuit protection.

Core Product Advantages and Features

Precise thermal jump

The thermal overload element can be adjusted within the range of 18~25A, and the trip value can be precisely set according to the rated current of the motor to prevent long-term overload damage.

Electromagnetic short circuit instantaneous jump

When a short circuit occurs, the electromagnetic tripping mechanism immediately activates, quickly cutting off the main circuit and protecting the motor and wiring system.

Screw-type terminal blocks

The main circuit adopts an M4 screw terminal design, which can lock 1~10mm² wires with a locking torque of 2~2.5N·m, ensuring stable construction.

High breaking capacity

With a maximum short-circuit breaking capacity of 100kA at 240V and 55kA at 400V, it provides ample system protection margin.

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	Screw-type terminal block (M4)
External dimensions (height x width x depth)	97 x 45 x 97 mm
weight	Approximately 345.6 g

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