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Siemens 3RV2021-1KA15 S0 Circuit Breaker with Aux Contacts

Siemens 3RV2021-1KA15 S0 motor protection circuit breaker with aux contacts.

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ManufacturerSiemens

Part number3RV2021-1KA15

Size S0

Trip Class CLASS 10

Adjustable Current 9-12.5 A

Fixed Current 163 A

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CAGE: 9NK75

Motor protection CLASS 10 Integrated auxiliary contacts (1 NO/1 NC) Screw terminals Size S0 Standard switching capacity

Product description

The Siemens 3RV2021-1KA15 is a versatile size S0 motor protection circuit breaker featuring a CLASS 10 thermal release (9-12.5A) and a 163A magnetic release. It comes equipped with screw terminals for installation and includes integrated transverse auxiliary switches (1 Normally Open, 1 Normally Closed) for signaling and control purposes.

This circuit breaker is designed for protecting electric motors and can be integrated into control systems requiring status feedback. It is widely adopted in industries such as automotive manufacturing, packaging machinery, and automation solutions where motor control and monitoring are essential.

Stanlo Automation, a veteran-owned supplier, offers the Siemens 3RV2021-1KA15, ensuring you receive a high-quality, reliable component. We pride ourselves on providing cost-effective surplus automation parts with exceptional service and prompt delivery.

Technical specifications

Size	S0
Trip Class	CLASS 10
Adjustable Current	9-12.5 A
Fixed Current	163 A
Terminal Type	Screw
Switching Capacity	Standard
Auxiliary Contacts	1 NO + 1 NC

Common applications

Motor control circuits

Signaling and monitoring

Automation systems

Industrial machinery

Control panels

Protection relays

Compatible systems

Siemens Sirius 3RV2 series

Also known as

Siemens 3RV2021-1KA15 breaker Siemens S0 circuit breaker with aux 3RV20211KA15 Siemens

Replaces / compatible with

This part is a Siemens 3RV2021-1KA15. For precise compatibility with existing systems, consult the Siemens technical datasheets.

Technical note

Expert tip

The transverse auxiliary switches on the 3RV2021-1KA15 are designed for easy snap-on mounting to the main circuit breaker body.

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Frequently asked questions

What is the function of the auxiliary contacts on the Siemens 3RV2021-1KA15?

The Siemens 3RV2021-1KA15 includes one normally open (NO) and one normally closed (NC) auxiliary contact. These are used for remote signaling of the breaker's status (tripped or closed) and for interlocking control circuits.