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Siemens 3RV2021-4BA15: Size S0 Motor Protection Circuit Breaker with Aux

Siemens 3RV2021-4BA15 Size S0 Motor Protection Circuit Breaker w/Aux

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ManufacturerSiemens

Part number3RV2021-4BA15

Size S0

Class 10

A-release 13-20 A

N-release 260 A

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Adjustable thermal overload protection Class 10 tripping Integrated auxiliary contacts (1 NO+1 NC) Screw terminals Phase loss sensitive

Product description

The Siemens 3RV2021-4BA15 is a Size S0 motor protection circuit breaker featuring integrated transverse auxiliary switches (1 NO + 1 NC). It provides an adjustable thermal overload protection (A-release) range of 13 to 20 Amps and a fixed magnetic short-circuit release (N-release) of 260 Amps, adhering to Class 10 tripping standards.

This breaker is suitable for motor protection in demanding industrial environments where auxiliary contacts are needed for signaling, interlocking, or control functions, common in manufacturing and process automation.

Stanlo Automation, a veteran-owned supplier of surplus industrial parts, offers the Siemens 3RV2021-4BA15, ensuring reliable components for your critical applications.

Technical specifications

Size	S0
Class	10
A-release	13-20 A
N-release	260 A
Aux Contacts	1 NO+1 NC
Terminals	Screw

Common applications

Motor protection

Industrial control

Automation systems

Machine interlocking

Control panel signaling

Compatible systems

Compatible with Siemens SIRIUS motor starter systems and associated accessories.

Also known as

Siemens 3RV2021-4BA15 breaker SIRIUS 3RV2 motor protector with aux

Replaces / compatible with

This Siemens 3RV2021-4BA15 includes auxiliary contacts, offering expanded functionality over basic 3RV2021-4BA20 models.

Technical note

Expert tip

The screw terminals ensure a reliable connection, and the built-in auxiliary contacts simplify wiring for control circuits and interlocks.

What happens next?

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Frequently asked questions

What is the short-circuit release rating for the Siemens 3RV2021-4BA15?

The Siemens 3RV2021-4BA15 has a fixed magnetic short-circuit release (N-release) of 260 Amps. This provides rapid protection against high fault currents in motor circuits.