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Siemens 3RH1921-1EA02 Auxiliary Switch - 2 NC Contacts

Siemens 3RH1921-1EA02 Front Auxiliary Switch with 2 NC contacts.

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ManufacturerSiemens

Part number3RH1921-1EA02

Type Front Auxiliary Switch

Contacts 2 NC

Terminal Type Screw

Compatibility 3RT1 Contactors

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Veteran-owned

CAGE: 9NK75

2 Normally Closed contacts Front mounting Screw terminals For 3RT1 contactors Adds control/feedback circuits

Product description

The Siemens 3RH1921-1EA02 is a front-mounted auxiliary switch unit designed for Siemens 3RT1 contactors. It features two normally closed (NC) contacts and utilizes screw terminals for secure connections.

This accessory expands the functionality of 3RT1 contactors, allowing for additional control or signaling circuits. It's commonly used for feedback signals, interlocking, or monitoring the status of the main contactor in motor control circuits and other automation applications.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RH1921-1EA02. We provide essential components to enhance your Siemens control systems, ensuring reliability and optimal performance.

Technical specifications

Type	Front Auxiliary Switch
Contacts	2 NC
Terminal Type	Screw
Compatibility	3RT1 Contactors

Common applications

Motor control circuits

Contactor feedback

Control panel wiring

Industrial automation

Safety interlocks

Compatible systems

Siemens 3RT1 series contactors

Also known as

Siemens 2 NC auxiliary switch 3RH19211EA02 Siemens 3RT1 accessory

Replaces / compatible with

Provides additional auxiliary contacts for Siemens 3RT1 series contactors.

Technical note

Expert tip

Ensure the auxiliary switch is correctly seated on the 3RT1 contactor to guarantee reliable electrical connection and operation.

What happens next?

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Frequently asked questions

How many normally closed (NC) contacts does the Siemens 3RH1921-1EA02 auxiliary switch unit have?

The Siemens 3RH1921-1EA02 auxiliary switch unit is equipped with two normally closed (NC) contacts.