3RV2021-4DA25

The 3RV2021-4DA25 is a Siemens SIRIUS S0 enclosure motor protection circuit breaker with a current adjustment range of 18~25A, a rated operating current of 25A, and conforms to IEC/EN 60947-4-1 standard. It is suitable for motor starting protection circuits.

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Product Positioning

The 3RV2021-4DA25 is a Siemens SIRIUS series S0 enclosure motor protection circuit breaker with a current adjustment range of 18~25A, providing dual protection against thermal overload and electromagnetic transient short circuit.

Core Product Advantages and Features

Precise setting of mid-section current

The current adjustment range is 18~25A, which can be used to match the rated current of various small and medium-sized motors, and the overload trip threshold can be accurately set.

Momentary short circuit tripping

The electromagnetic instantaneous trip unit operates instantly during a short circuit, quickly cutting off the circuit to reduce the impact of the accident.

S0 standard housing design

It is compatible with the same size housing as the SIRIUS series and can be used with accessories such as auxiliary contacts and alarm contacts to expand its applications.

Rail-mounted quick installation

Supports 35mm standard DIN rail clip installation, or screw fixing, facilitating switchboard configuration, maintenance and replacement.

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

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