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Siemens 3RH1921-2CA10 Front Auxiliary Switch - 1 NO

Siemens 3RH1921-2CA10 Front Auxiliary Switch with 1 NO contact.

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ManufacturerSiemens

Part number3RH1921-2CA10

Contact Configuration 1 NO

Terminal Type Spring-Type Terminal

Mounting Front-side

Series SIRIUS 3RH19

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1 normally open (NO) contact Spring-type terminals for quick wiring Front-side snap-on mounting Designed for 3RT1 contactors SIRIUS quality and reliability IP20 rated

Product description

The Siemens 3RH1921-2CA10 is a front-side auxiliary switch designed for Siemens 3RT1 contactors. It features one normally open (NO) instantaneous contact and utilizes spring-type terminals for fast and secure connections. This switch easily snaps onto the front of the contactor, offering a simple solution for expanding control circuits.

This auxiliary switch is ideal for status indication and control circuits where a normally open contact is required. It is frequently used in industrial automation, motor control applications, and panel building where additional signaling points are needed.

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Technical specifications

Contact Configuration	1 NO
Terminal Type	Spring-Type Terminal
Mounting	Front-side
Series	SIRIUS 3RH19
Compatibility	Siemens 3RT1 Contactors
IP Rating	IP20 (Front)
Insulation Voltage	690V AC
Surge Voltage	6 kV

Common applications

Motor Control

Control Panels

Industrial Automation

Signaling

Interlocking Circuits

Panel Building

Compatible systems

Siemens 3RT10, 3RT12, 3RT145, 3RT146, 3RT147 Contactors

Also known as

Siemens SIRIUS 3RH1921-2CA10 3RH1921-2CA10 Siemens NO Auxiliary Contact

Replaces / compatible with

This auxiliary switch is designed to expand the signaling capabilities of Siemens 3RT1 series contactors, providing a single NO contact for various control functions.

Technical note

Expert tip

When mounting this auxiliary switch, ensure it is correctly aligned with the 3RT1 contactor's designated mounting points. Periodic checks of the spring terminal connections are recommended in high-vibration applications.

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Frequently asked questions

What are the benefits of using spring-type terminals on the Siemens 3RH1921-2CA10?

The spring-type terminals on the Siemens 3RH1921-2CA10 offer significant advantages, including faster installation times as they require no tools for wiring. They also provide a secure, vibration-resistant connection, which is crucial for reliable operation in demanding industrial environments.