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Siemens 3RV1901-1E Auxiliary Switch

Siemens 3RV1901-1E Auxiliary Switch (1 NO + 1 NC)

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ManufacturerSiemens

Part number3RV1901-1E

Type Auxiliary Switch

Contacts 1 NO + 1 NC

For Circuit Breaker Sizes S00 to S3

Series SIRIUS (Phased-out)

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Veteran-owned

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1 Normally Open contact 1 Normally Closed contact For S00-S3 circuit breakers Signaling and interlocking Siemens quality

Product description

The Siemens 3RV1901-1E is an auxiliary switch designed for use with Siemens circuit breakers of sizes S00 through S3. It provides one normally open (NO) contact and one normally closed (NC) contact, commonly used for signaling or interlocking purposes within motor control circuits. Please note that this is a phased-out product, with the preferred successor being the SIRIUS 3RV2901-1E.

Auxiliary switches are essential for building complex control and safety systems, enabling monitoring of breaker status (open/closed) or interlocking with other control components. They find application in motor control centers, switchgear, and safety circuits across industries like manufacturing, power distribution, and building automation.

Stanlo Automation, a veteran-owned surplus parts distributor, offers legacy and current components. While the 3RV1901-1E is phased out, we may have available stock. Consider the successor 3RV2901-1E for new installations. Partner with Stanlo for your industrial automation needs.

Technical specifications

Type	Auxiliary Switch
Contacts	1 NO + 1 NC
For Circuit Breaker Sizes	S00 to S3
Series	SIRIUS (Phased-out)

Common applications

Motor control centers

Switchgear

Safety circuits

Status monitoring

Control panel building

Compatible systems

Siemens 3RV1 circuit breakers (Sizes S00, S0, S2, S3)

Also known as

Siemens NO NC Auxiliary Contact 3RV1 Auxiliary Switch SIRIUS Switch

Replaces / compatible with

This auxiliary switch is designed for Siemens 3RV1 circuit breakers. The preferred successor for this phased-out product is the Siemens SIRIUS 3RV2901-1E.

Technical note

Expert tip

When replacing this phased-out auxiliary switch, ensure the mounting and electrical connections are compatible with the successor 3RV2901-1E if upgrading.

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Frequently asked questions

What are the contact configurations for the Siemens 3RV1901-1E auxiliary switch?

The Siemens 3RV1901-1E auxiliary switch provides one normally open (NO) contact and one normally closed (NC) contact. These are used for status indication or interlocking functions within control circuits.