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Siemens 3RV1901-1B Auxiliary Switch - 2 NO Contacts

Siemens 3RV1901-1B auxiliary switch with 2 NO contacts.

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ManufacturerSiemens

Part number3RV1901-1B

Contact configuration 2 NO (Normally Open)

Mounting Side-mountable

Compatibility Siemens circuit breakers Size S00...S3

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Veteran-owned

CAGE: 9NK75

2 Normally Open (NO) contacts Side-mountable design For circuit breakers S00 to S3 Enables signaling and interlocking

Product description

The Siemens 3RV1901-1B is a side-mountable auxiliary switch designed for use with Siemens circuit breakers in sizes S00 through S3. This accessory provides two normally open (NO) contacts, allowing for signaling or interlocking functions.

This auxiliary switch is commonly used in motor control circuits, control panels, and automation systems to provide feedback on the status of the main circuit breaker. It is essential for implementing safety interlocks and remote monitoring.

Stanlo Automation, a veteran-owned surplus distributor, offers the Siemens 3RV1901-1B and other hard-to-find industrial automation components. We specialize in providing reliable surplus parts to support your maintenance and upgrade projects.

Technical specifications

Contact configuration	2 NO (Normally Open)
Mounting	Side-mountable
Compatibility	Siemens circuit breakers Size S00...S3

Common applications

Motor control

Control panels

Automation systems

Safety interlocks

Industrial machinery

Compatible systems

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

Also known as

Siemens 3RV1901-1B SIRIUS 3RV1 auxiliary switch

Replaces / compatible with

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

Technical note

Expert tip

Ensure the auxiliary switch is correctly latched onto the circuit breaker body to guarantee reliable electrical and mechanical connection, preventing false signals.

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Frequently asked questions

What type of contacts does the Siemens 3RV1901-1B auxiliary switch have?

The Siemens 3RV1901-1B auxiliary switch is equipped with two Normally Open (NO) contacts. These contacts can be used for signaling purposes, such as indicating that the main circuit breaker is in the ON position.