3RV2321-4BC20

The 3RV2321-4BC20 is a Siemens SIRIUS S0 frame motor protection circuit breaker with a rated current of 20A and an instantaneous short-circuit trip value of 260A. It adopts a spring terminal design, which can be quickly connected without tools. It has a maximum operating voltage of 690V AC and is suitable for mass production lines to improve assembly efficiency.

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Siemens SIRIUS 3RV2321-4BC20 Motor Protection Circuit Breaker 20A Spring Terminal Appearance Drawing

Product Positioning

The Siemens SIRIUS 3RV2321-4BC20 is a motor protection circuit breaker with an S0 frame and starter combination. It has a rated current of 20A, an instantaneous short-circuit trip value of 260A, and uses spring-loaded terminal wiring.

Core Product Advantages and Features

Spring-loaded terminal quick-connect

Screwless fastening, suitable for mass production lines to improve assembly efficiency.

20A rated with 260A instantaneous trip

Provides a stable short-circuit protection response speed for the starter combination circuit.

S0 standard frame dimensions

It can be directly assembled with SIRIUS contactors and auxiliary contact modules.

690V AC maximum operating voltage

It has a wide range of applications and can meet the power distribution needs of different voltage levels.

project	Specification
brand	Siemens
series	SIRIUS 3RV2
Frame size	S0
Rated current	20 A
Instantaneous short circuit trip value N-release	260 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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