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Siemens 3RV2021-4AA15: Size S0 Motor Protection Circuit Breaker with Aux

Siemens 3RV2021-4AA15 Size S0 Motor Protection Circuit Breaker w/Aux

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ManufacturerSiemens

Part number3RV2021-4AA15

Size S0

Class 10

A-release 10-16 A

N-release 208 A

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CAGE: 9NK75

Adjustable thermal overload protection Class 10 tripping Integrated auxiliary contacts (1 NO+1 NC) Screw terminals DIN rail mountable

Product description

The Siemens 3RV2021-4AA15 is a Size S0 motor protection circuit breaker equipped with integral transverse auxiliary switches (1 NO + 1 NC). It offers an adjustable thermal overload protection (A-release) range of 10 to 16 Amps and a fixed magnetic short-circuit release (N-release) of 208 Amps, all within Class 10 tripping parameters.

This breaker is ideal for motor control applications where additional signaling or interlocking functions are required, commonly found in industrial automation, machine building, and control panel designs.

Stanlo Automation, a veteran-owned distributor of quality surplus industrial parts, is your source for the Siemens 3RV2021-4AA15, ensuring reliable components for your automation needs.

Technical specifications

Size	S0
Class	10
A-release	10-16 A
N-release	208 A
Aux Contacts	1 NO+1 NC
Terminals	Screw

Common applications

Motor protection

Industrial automation

Control panel signaling

Machine interlocking

Electrical systems

Compatible systems

Compatible with Siemens SIRIUS motor starter systems and associated accessories.

Also known as

Siemens 3RV2021-4AA15 breaker SIRIUS 3RV2 motor protector with aux

Replaces / compatible with

This Siemens 3RV2021-4AA15 provides enhanced functionality over basic 3RV2021-4AA10 models by including auxiliary contacts for signaling or interlocking.

Technical note

Expert tip

The integrated auxiliary contacts simplify wiring for control circuits and interlocks, making this unit a versatile choice for complex motor control applications.

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Frequently asked questions

What do the '1 NO+1 NC' auxiliary contacts on the 3RV2021-4AA15 signify?

The '1 NO+1 NC' indicates one normally open (NO) and one normally closed (NC) auxiliary contact. These contacts can be used for remote signaling of the breaker's status or for interlocking with other control components.