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Siemens 3RV2031-4DB10: S2 Motor Protection, Class 20, 18-25A

Siemens 3RV2031-4DB10: Size S2 Motor Protection Circuit Breaker, Class 20

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ManufacturerSiemens

Part number3RV2031-4DB10

Size S2

Class 20

A-release 18-25 A

N-release 325 A

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Motor protection Adjustable overload protection (Class 20) Short-circuit protection Standard switching capacity Screw terminals

Product description

The Siemens 3RV2031-4DB10 is a Size S2 motor protection circuit breaker from the SIRIUS 3RV2 series, featuring a Class 20 thermal release. With an adjustable range of 18-25A and a short-circuit release (N-release) of 325A, it provides robust protection for motors that require a slower tripping characteristic. This breaker uses screw terminals for reliable connections and offers standard switching capacity, suitable for demanding industrial applications.

This motor protection circuit breaker is ideal for applications where motors may experience higher starting currents or require a longer acceleration time. Its Class 20 rating helps prevent nuisance tripping while still ensuring effective overload protection. The S2 frame size makes it a compact and efficient choice for motor feeder circuits.

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Technical specifications

Size	S2
Class	20
A-release	18-25 A
N-release	325 A
Terminals	Screw
Switching Capacity	Standard

Common applications

Industrial machinery

Motor control

Pumps

Fans

Applications with high starting current

Compatible systems

Compatible with Siemens SIRIUS 3RV2 series components and accessories.

Also known as

Siemens S2 Motor Protector 3RV2031-4DB10 Breaker SIRIUS 3RV2 Class 20

Replaces / compatible with

Direct replacement for Siemens S2 motor protection circuit breakers with an 18-25A adjustment range and Class 20 rating.

Technical note

Expert tip

The Class 20 rating makes this breaker suitable for applications where motors may experience extended start-up times or frequent starts without premature tripping.

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Frequently asked questions

When is a Class 20 motor protection circuit breaker preferred over a Class 10?

A Class 20 motor protection circuit breaker is preferred for motors with higher starting inrush currents or longer acceleration times. The slower tripping characteristic of Class 20 helps prevent nuisance tripping during motor startup while still providing adequate overload protection.