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Siemens 3RV2042-4KB10 S3 Motor Protection Circuit Breaker

Siemens 3RV2042-4KB10 Size S3 Motor Protection Circuit Breaker

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ManufacturerSiemens

Part number3RV2042-4KB10

Size S3

Motor Protection Yes

Class 20

A-release 57-75 A

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Motor protection Class 20 rating Adjustable overload 100 kA breaking capacity Screw terminals Increased switching capacity

Product description

The Siemens 3RV2042-4KB10 is a Size S3 motor protection circuit breaker, offering a Class 20 rating suitable for motors with longer start-up times. It includes an adjustable overload current (A-release) from 57 to 75 Amps and a short-circuit release (N-release) of 975 Amps. This breaker utilizes screw terminals, provides increased switching capacity, and a 100 kA breaking capacity.

This circuit breaker is ideal for protecting motors in applications that may involve longer acceleration phases or sustained moderate overloads. It is commonly used in heavy machinery, industrial fans, and large pump systems across various industrial sectors.

Stanlo Automation, a veteran-owned distributor, offers the Siemens 3RV2042-4KB10. We provide reliable surplus industrial automation parts, ensuring quality and value for your operational needs.

Technical specifications

Size	S3
Motor Protection	Yes
Class	20
A-release	57-75 A
N-release	975 A
Terminals	Screw
Switching Capacity	Increased
Breaking Capacity	100 kA

Common applications

Motor control

Heavy industry

Manufacturing

Pump stations

Fan systems

Industrial machinery

Compatible systems

Siemens 3RV2 Series

Also known as

Siemens 3RV20424KB10 3RV2 S3 Class 20 breaker Siemens motor starter protector 57-75A

Replaces / compatible with

The Siemens 3RV2042-4KB10 is a Class 20 motor protection circuit breaker. It is designed for applications that require a slower tripping response to overload conditions compared to Class 10 breakers.

Technical note

Expert tip

When using the Siemens 3RV2042-4KB10, ensure the adjustable overload setting is carefully chosen to protect the motor from thermal damage while accommodating its specific starting characteristics.

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Frequently asked questions

What is the benefit of the Class 20 rating on the Siemens 3RV2042-4KB10?

The Class 20 rating allows the Siemens 3RV2042-4KB10 to tolerate longer start-up times or sustained overloads for up to 20 seconds at six times the rated current. This prevents nuisance tripping in applications with high inrush current.