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Siemens 3RV2021-4EA25 S0 Motor Protection Circuit Breaker

Siemens 3RV2021-4EA25 S0 Motor Protection Circuit Breaker with spring terminals.

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ManufacturerSiemens

Part number3RV2021-4EA25

Size S0

Class 10

A-release 27-32 A

N-release 400 A

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Motor protection Adjustable current setting Spring-type terminals Standard switching capacity Includes auxiliary contacts Class 10 rating

Product description

The Siemens 3RV2021-4EA25 is a Size S0 circuit breaker designed for motor protection. It features a Class 10 rating with an adjustable A-release from 27 to 32 A and an N-release of 400 A. This model utilizes spring-type terminals for secure connections and offers standard switching capacity with transverse auxiliary switches, including 1 normally open (NO) and 1 normally closed (NC) contact.

This motor protection circuit breaker is ideal for safeguarding electric motors across various industrial applications, including pump control, fan systems, and conveyor belts. It is commonly found in control panels for manufacturing, processing, and automation industries where reliable motor starting and protection are critical.

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Technical specifications

Size	S0
Class	10
A-release	27-32 A
N-release	400 A
Terminals	Spring-type
Auxiliary Switches	1 NO + 1 NC
Switching Capacity	Standard

Common applications

Motor control

Pump applications

Fan systems

Conveyor systems

Industrial machinery

Automation panels

Compatible systems

Siemens Sirius 3RV2 series motor protection

Also known as

Siemens 3RV2 S0 breaker 3RV2021-4EA25 motor starter Siemens circuit breaker S0

Replaces / compatible with

Replaces older Siemens motor protection circuit breakers in the S0 size. Compatible with Siemens Sirius accessories.

Technical note

Expert tip

Ensure the spring-type terminals are properly torqued for reliable electrical connection and to prevent nuisance tripping.

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Frequently asked questions

What is the adjustable current range for the Siemens 3RV2021-4EA25 circuit breaker?

The Siemens 3RV2021-4EA25 circuit breaker has an adjustable overload release (A-release) setting that ranges from 27 to 32 Amps. This allows for precise calibration to protect motors of corresponding power ratings.