3RV2321-4AC10

The 3RV2321-4AC10 is a Siemens SIRIUS S0 frame motor protection circuit breaker with a rated current of 16A and an instantaneous short-circuit trip value of 208A. It adopts a screw terminal connection method and has a breaking capacity of 25kA at 400V AC. It can be combined with SIRIUS contactors to form a small starter combination and is widely used in general industrial equipment.

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Siemens SIRIUS 3RV2321-4AC10 Motor Protection Circuit Breaker 16A Screw Terminal Appearance Drawing

Product Positioning

The Siemens SIRIUS 3RV2321-4AC10 is a motor protection circuit breaker with an S0 frame and starter combination. It has a rated current of 16A, an instantaneous short-circuit trip value of 208A, and uses screw terminal wiring.

Core Product Advantages and Features

Screw terminal wiring method

The contact pressure is stable, making it suitable for machines that operate for long periods and require regular maintenance.

16A rated with 208A instantaneous trip

This corresponds to the protection requirements of motors with a power output of approximately 4 to 11 kW (230 to 690 V).

S0 standard frame dimensions

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

Triple short circuit protection

In the event of a short circuit fault, all three poles trip synchronously to ensure the safety of downstream equipment.

project	Specification
brand	Siemens
series	SIRIUS 3RV2
Frame size	S0
Rated current	16 A
Instantaneous short circuit trip value N-release	208 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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