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Siemens 3RV1021-4DA15 Motor Protection Circuit Breaker w/ Aux Switch

Name: Siemens 3RV1021-4DA15
Brand: Siemens
SKU: 3RV1021-4DA15
Availability: InStock

Siemens 3RV1021-4DA15 Size S0 Motor Protection Circuit Breaker w/ Aux

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ManufacturerSiemens

Part number3RV1021-4DA15

Size S0

Class 10

A-release 20-25 A

Short-circuit release 325 A

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12-month warranty

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Motor protection Class 10 rating Adjustable overload protection 1NO+1NC auxiliary contacts High fault current capability

Product description

The Siemens 3RV1021-4DA15 is a Size S0 motor protection circuit breaker featuring a Class 10 rating and an adjustable A-release range of 20 to 25 A. It includes a high short-circuit release of 325 A and is equipped with a transverse auxiliary switch offering 1 normally open (NO) and 1 normally closed (NC) contact for signaling and control integration.

This circuit breaker is ideal for protecting medium to large industrial motors in demanding environments like manufacturing plants, material handling, and process control systems. The integrated auxiliary contacts enable sophisticated control logic and status monitoring.

Stanlo Automation, a veteran-owned surplus parts distributor, is your trusted source for obsolete industrial automation components. Obtain the Siemens 3RV1021-4DA15 from our extensive inventory to ensure your systems remain operational.

Technical specifications

Size	S0
Class	10
A-release	20-25 A
Short-circuit release	325 A
Auxiliary Switch	1 NO + 1 NC
Terminals	Screw

Common applications

Industrial motors

Manufacturing automation

Material handling

Process industries

Control panels

Also known as

Siemens 3RV1021-4DA15 SIRIUS 3RV1021-4DA15 Siemens 25A breaker with aux

Replaces / compatible with

This is a phased-out product. The preferred successor is the SIRIUS 3RV2021-4DA15, which is part of the newer SIRIUS 3RV2 series.

Technical note

Expert tip

The presence of auxiliary contacts makes this breaker suitable for integration into SCADA systems or sophisticated motor control schemes.

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Frequently asked questions

What is the function of the 1 NO + 1 NC auxiliary contacts on the Siemens 3RV1021-4DA15?

The auxiliary contacts on the 3RV1021-4DA15 provide remote signaling capabilities. The normally open (NO) contact can indicate the breaker is in a ready state or closed, while the normally closed (NC) contact can signal a tripped condition or be used in interlocks.