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Siemens 3RV2021-4NA20 S0 Motor Protection Circuit Breaker

Siemens 3RV2021-4NA20 S0 motor protection breaker with spring terminals.

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ManufacturerSiemens

Part number3RV2021-4NA20

Size S0

Class 10

A-release 23-28 A

N-release 364 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 Class 10 rating Vibration resistant terminals

Product description

The Siemens 3RV2021-4NA20 is a Size S0 motor protection circuit breaker designed for Class 10 performance. It features an adjustable A-release from 23 to 28 A and a short-circuit release of 364 A. This model utilizes spring-type terminals for quick and reliable connections and offers standard switching capacity.

This circuit breaker is well-suited for applications where ease of wiring and high vibration resistance are important. It provides essential motor protection for equipment in manufacturing, automation, and process industries.

Stanlo Automation, a veteran-owned supplier of industrial automation surplus, offers the Siemens 3RV2021-4NA20. We provide quality components and expert service to support your automation needs.

Technical specifications

Size	S0
Class	10
A-release	23-28 A
N-release	364 A
Terminals	Spring-type
Switching Capacity	Standard

Common applications

Motor control

Industrial automation

Manufacturing equipment

Process control

Machine tools

Harsh environments

Compatible systems

Siemens Sirius 3RV2 series motor protection

Also known as

Siemens 3RV2 S0 breaker 3RV2021-4NA20 motor starter Siemens 23-28A circuit breaker spring

Replaces / compatible with

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

Technical note

Expert tip

Ensure the conductors are stripped to the correct length for proper insertion into the spring-type terminals to guarantee a secure connection.

What happens next?

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Frequently asked questions

What are the advantages of using spring-type terminals on the 3RV2021-4NA20?

Spring-type terminals on the Siemens 3RV2021-4NA20 offer faster installation and a connection that is more resistant to vibration compared to screw terminals. This makes them ideal for applications with frequent machinery movement or in environments prone to shock.