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Siemens 3RV1121-1EA10 S0 Motor Protection Circuit Breaker - 2.8-4A

Siemens 3RV1121-1EA10 S0 Motor Protection Circuit Breaker

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ManufacturerSiemens

Part number3RV1121-1EA10

Size S0

Class 10

A-release 2.8-4 A

Short-circuit release 52 A

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CAGE: 9NK75

Motor protection Integrated overload relay Class 10 protection Adjustable A-release Screw terminals Phased-out product

Product description

The Siemens 3RV1121-1EA10 is a Size S0 motor protection circuit breaker that integrates overload relay functionality for comprehensive motor protection. It is designed with Class 10 thermal protection, an adjustable A-release range of 2.8 to 4 Ampere, and a short-circuit release of 52 Ampere. This breaker utilizes screw terminals for secure connections and offers standard switching capacity.

This circuit breaker is ideal for applications where a compact, integrated solution for motor overload and short-circuit protection is needed, such as in smaller industrial machinery, pumps, fans, and HVAC systems.

Stanlo Automation, a veteran-owned surplus parts distributor, is your go-to source for industrial automation components. We offer specialized and phased-out parts like the Siemens 3RV1121-1EA10, ensuring you can maintain and repair your existing systems effectively. Trust Stanlo Automation for reliable parts and expert support.

Technical specifications

Size	S0
Class	10
A-release	2.8-4 A
Short-circuit release	52 A
Terminals	Screw
Function	Overload Relay

Common applications

Small industrial motors

Pumps

Fans

HVAC systems

Automation equipment

Compatible systems

Suitable for Siemens motor control panels and automation systems

Also known as

Siemens 3RV1121-1EA10 breaker SIRIUS 3RV1121-1EA10 Motor protection relay breaker

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RV2111-1EA10.

Technical note

Expert tip

Ensure the correct A-release setting is chosen based on the motor's full load amperage (FLA) to prevent both motor damage and unnecessary tripping.

What happens next?

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Frequently asked questions

What is the overload protection feature of the Siemens 3RV1121-1EA10?

The Siemens 3RV1121-1EA10 integrates an overload relay function, providing Class 10 thermal protection with an adjustable trip range from 2.8 to 4 Ampere to safeguard motors from sustained overcurrents.