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Siemens 3RV1901-1D Auxiliary Switch - 1 CO Contact

Siemens 3RV1901-1D auxiliary switch with 1 CO contact.

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ManufacturerSiemens

Part number3RV1901-1D

Contact configuration 1 CO (Changeover)

Mounting Transverse

Compatibility Siemens circuit breakers Size S00...S3

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1 Changeover (CO) contact Transverse mounting For circuit breakers S00 to S3 Provides NO and NC contacts

Product description

The Siemens 3RV1901-1D is a transverse auxiliary switch designed for use with Siemens circuit breakers from size S00 to S3. It features one Changeover (CO) contact, providing both normally open (NO) and normally closed (NC) functions for flexible integration.

This auxiliary switch is ideal for applications requiring more complex signaling or interlocking logic, such as controlling indicator lights, alarms, or other control system components based on the circuit breaker's state.

Stanlo Automation, a veteran-owned surplus parts distributor, is your reliable source for the Siemens 3RV1901-1D and other obsolete industrial automation components. We help you source the exact parts needed to maintain and repair your essential equipment.

Technical specifications

Contact configuration	1 CO (Changeover)
Mounting	Transverse
Compatibility	Siemens circuit breakers Size S00...S3

Common applications

Motor control

Control panels

Automation systems

Safety interlocks

Industrial machinery

Signaling circuits

Compatible systems

Siemens SIRIUS 3RV1 series circuit breakers (S00-S3)

Also known as

Siemens 3RV1901-1D SIRIUS 3RV1 auxiliary switch

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RV2901-1D.

Technical note

Expert tip

The transverse mounting of this auxiliary switch requires sufficient side clearance on the circuit breaker, so ensure the control panel layout accommodates this accessory.

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Frequently asked questions

What does the 1 CO contact on the Siemens 3RV1901-1D offer?

The 1 CO (Changeover) contact on the Siemens 3RV1901-1D auxiliary switch provides one set of contacts that can function as both normally open (NO) and normally closed (NC). This allows for versatile integration into control and signaling circuits.