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Siemens 3RV2421-4BA20 S0 Transformer Protection Circuit Breaker

Siemens 3RV2421-4BA20 Size S0 circuit breaker with spring terminals.

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ManufacturerSiemens

Part number3RV2421-4BA20

Size S0

For transformer protection Yes

A-release 13...20 A

N-release 325 A

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Transformer protection Adjustable overload protection Fixed short-circuit release (N-release) Spring-type terminals Standard switching capacity Size S0

Product description

The Siemens 3RV2421-4BA20 is a Size S0 circuit breaker designed for transformer protection, featuring spring-type terminals for faster installation. It offers an adjustable A-release (overload) from 13 to 20 Amps and an N-release (short-circuit) of 325 Amps. This breaker provides standard switching capacity.

Ideal for applications where quick and secure connections are needed, this breaker protects transformers in various industrial settings. The spring terminals facilitate efficient wiring, reducing installation time and effort.

Stanlo Automation, your veteran-owned source for surplus industrial parts, offers the Siemens 3RV2421-4BA20. We ensure you receive quality components to maintain your automation systems reliably and cost-effectively.

Technical specifications

Size	S0
For transformer protection	Yes
A-release	13...20 A
N-release	325 A
Terminals	Spring-type terminal
Switching capacity	Standard

Common applications

Transformer protection

Industrial automation

Control panels

Manufacturing equipment

Quick-connect applications

Electrical systems

Compatible systems

Siemens Sirius 3RV2 Siemens 3RV2 accessories

Also known as

Siemens 3RV24214BA20 Siemens S0 spring terminal breaker Siemens 13-20A transformer breaker

Replaces / compatible with

Compatible with Siemens Sirius 3RV2 series accessories.

Technical note

Expert tip

Ensure conductors are stripped to the correct length for secure insertion into the spring-type terminals, preventing intermittent connections.

What happens next?

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Frequently asked questions

What are the benefits of using spring-type terminals on the 3RV2421-4BA20?

Spring-type terminals (also known as push-in or cage clamp) offer faster wiring installation compared to screw terminals, as they require no tools to insert the conductor. They also provide a consistently reliable connection, even in environments with vibration.