3RV2321-4DC20

The 3RV2321-4DC20 is an S0 frame motor protection circuit breaker with a rated current of 25A and an instantaneous short-circuit trip value of 325A. The terminals adopt a spring design, which can complete the wiring without screws. It can be used with SIRIUS contactors to form a complete starter combination. The 690V AC wide voltage range is suitable for most industrial power distribution applications.

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Siemens SIRIUS 3RV2321-4DC20 Motor Protection Circuit Breaker 25A Spring Terminal Appearance Drawing

Product Positioning

The Siemens SIRIUS 3RV2321-4DC20 is a motor protection circuit breaker with an S0 frame and starter combination. It has a rated current of 25A and an instantaneous short-circuit trip value of 325A. It uses spring-loaded terminals for easy and quick wiring.

Core Product Advantages and Features

Spring-loaded terminal design

Screwless fastening; simply insert the wire to complete the wiring, shortening installation and maintenance time.

25A rated with 325A instantaneous trip

Provides stable and reliable short-circuit protection energy for the starter combination circuit.

S0 standard frame dimensions

It can be directly assembled with SIRIUS contactors and overload relays to form a complete motor starting unit.

690V AC wide operating voltage

Suitable for various industrial power distribution environments ranging from low voltage to medium and high voltage.

project	Specification
brand	Siemens
series	SIRIUS 3RV2
Frame size	S0
Rated current	25 A
Instantaneous short circuit trip value N-release	325 A
Extreme number	3P
Rated operating voltage	690 V AC
Rated short-circuit breaking capacity Icu (400V AC)	55 kA
Rated short-circuit breaking capacity Icu (690V AC)	4 kA
Terminal type	Spring-loaded terminals
Overload protection method	Fixed rated current, stepless adjustment, requires an overload relay.
Protection level	IP20
Installation method	35 mm DIN rail (EN 60715)
Operating ambient temperature	-20°C ~ 60°C
Product Uses	Circuit breaker for starter combination.

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