3RV2021-4NA25

SIRIUS 3RV2021-4NA25, S0 frame motor protection circuit breaker, adjustable current 23-28A, spring terminals, built-in 1NO+1NC auxiliary switch, instantaneous trip 364A, maximum short circuit current interruption of 4kA below 690V.

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Siemens SIRIUS 3RV2021-4NA25 Motor Protection Circuit Breaker Product Image

Product Positioning

The SIRIUS 3RV2021-4NA25 is a Siemens S0 frame motor protection circuit breaker with a spring-loaded terminal design and built-in auxiliary switch. It has an adjustable current range of 23 to 28A and is suitable for motor circuits that require fast wiring and signal feedback.

Core Product Advantages and Features

Spring-loaded quick-connect terminal

The main circuit uses spring-loaded terminals, eliminating the need for repeated tightening with a screwdriver and resulting in higher wiring efficiency.

Built-in auxiliary switch

It has a built-in 1NO+1NC horizontal auxiliary switch, which can directly feed back the circuit breaker status to the control circuit.

Wide adjustable current range

The overload current is adjustable from 23 to 28A, covering the rated current requirements of a variety of medium-sized motors.

Multi-voltage breaking capacity

It has corresponding short-circuit breaking capacity under different voltages from 240V to 690V, and is suitable for various power grids.

project	Specification
model	3RV2021-4NA25
Frame size	S0
Overload current adjustable range	23...28 A
Instantaneous short-circuit release value (N-release)	364 A
Break away from level	CLASS 10
Terminal type	Spring-type terminals
Auxiliary switch	Built-in 1NO+1NC horizontal auxiliary switch
Maximum short-circuit breaking capacity Icu	240V:100kA／400V:55kA／500V:10kA／690V:4kA
Rated operating voltage	690 V AC
Extreme number	3P
External dimensions (height x width x depth)	119 x 45 x 97 mm
Installation method	35mm standard guide rail

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