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Siemens 3RV2021-4DA25 S0 Motor Protection Breaker w/ Aux Switch

Siemens 3RV2021-4DA25 S0 Motor Protection Breaker with Aux

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ManufacturerSiemens

Part number3RV2021-4DA25

Size S0

Motor Protection Yes

Class 10

A-Release 18-25 A

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Motor protection Adjustable trip current Standard switching capacity Spring-type terminals 1 NO+1 NC auxiliary switches

Product description

The Siemens 3RV2021-4DA25 is a size S0 motor starter protector designed for reliable motor protection and integrated control signaling. It features a CLASS 10 rating, an adjustable A-release range of 18A to 25A, and a fixed N-release of 325A. This model utilizes spring-type terminals for easy and secure connections and includes one normally open (NO) and one normally closed (NC) transverse auxiliary switch.

This circuit breaker is suitable for applications requiring robust motor protection and status feedback. Common uses include motor control in manufacturing, material handling, and process automation where vibration resistance and quick connections are beneficial.

Stanlo Automation, a veteran-owned surplus industrial parts distributor, offers the Siemens 3RV2021-4DA25. We ensure competitive pricing and rapid delivery to help you minimize operational downtime. Count on Stanlo for dependable automation solutions.

Technical specifications

Size	S0
Motor Protection	Yes
Class	10
A-Release	18-25 A
N-Release	325 A
Terminals	Spring-type
Aux Switches	1 NO + 1 NC
Switching Capacity	Standard

Common applications

Motor control

Automation systems

Pump controls

Fan controls

Signaling circuits

High-vibration environments

Compatible systems

PLC systems Control panels Motor starter assemblies Industrial automation equipment Control cabinet wiring

Also known as

Siemens 3RV2021-4DA25 3RV20214DA25 Siemens S0 spring terminal breaker aux

Replaces / compatible with

Compatible with Siemens 3RV2 series motor protection and control systems.

Technical note

Expert tip

The spring-type terminals on the 3RV2021-4DA25 eliminate the need for torque wrenches and ensure consistent termination pressure, ideal for rapid assembly or maintenance.

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Frequently asked questions

Can the Siemens 3RV2021-4DA25 be used in high-vibration environments?

Yes, the Siemens 3RV2021-4DA25 features spring-type terminals, which provide a secure and vibration-resistant connection, making it suitable for applications in environments with significant vibration.