3RV2321-4BC10

The 3RV2321-4BC10 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 uses screw terminal wiring and has a breaking capacity of 55kA at 400V AC. It can be used for motor applications ranging from approximately 5.5 to 15kW and is suitable for use with overload relays.

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Siemens SIRIUS 3RV2321-4BC10 Motor Protection Circuit Breaker 20A Screw Terminal Appearance Drawing

Product Positioning

The Siemens SIRIUS 3RV2321-4BC10 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 screw terminal wiring.

Core Product Advantages and Features

Screw terminal wiring method

It has stable contact pressure and is suitable for production line equipment that requires long-term stable operation.

20A rated with 260A instantaneous trip

It covers applications for motors ranging from approximately 5.5 to 15 kW (230 to 690 V).

55kA breaking capacity at 400V AC

This effectively reduces the risk of short-circuit faults impacting downstream equipment.

S0 standard frame dimensions

It has excellent compatibility with SIRIUS contactors and auxiliary contact modules.

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	Screw-type 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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