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Siemens 3RH1921-2CA01 Front Auxiliary Switch - 1 NC

Siemens 3RH1921-2CA01 Front Auxiliary Switch with 1 NC contact.

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ManufacturerSiemens

Part number3RH1921-2CA01

Contact Configuration 1 NC

Terminal Type Spring-Type Terminal

Mounting Front-side

Series SIRIUS 3RH19

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12-month warranty

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Veteran-owned

CAGE: 9NK75

1 normally closed (NC) contact Spring-type terminals for fast wiring Front-side snap-on mounting Designed for 3RT1 contactors SIRIUS quality IP20 rated

Product description

The Siemens 3RH1921-2CA01 is a front-side auxiliary switch designed for Siemens 3RT1 contactors. It features one normally closed (NC) instantaneous contact and utilizes spring-type terminals for quick and secure connections. Its compact design allows for easy snap-on mounting to the front of the contactor.

This auxiliary switch is ideal for applications requiring a simple NC contact for signaling or interlocking purposes in industrial control systems. It is commonly used in manufacturing plants, process automation, and building management systems.

Stanlo Automation, a veteran-owned surplus distributor, offers the Siemens 3RH1921-2CA01. We provide reliable automation components at competitive prices, ensuring your systems stay operational.

Technical specifications

Contact Configuration	1 NC
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

Machine Safety

Interlocking Circuits

Building Automation

Compatible systems

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

Also known as

Siemens SIRIUS 3RH1921-2CA01 3RH1921-2CA01 Siemens NC Auxiliary Contact

Replaces / compatible with

This auxiliary switch is designed to expand the signaling capabilities of Siemens 3RT1 series contactors, providing a single NC contact for various control functions.

Technical note

Expert tip

When mounting multiple auxiliary switches, observe the location digits on the 3RT1 contactor to ensure proper alignment and function. The spring terminals offer vibration resistance but should be checked periodically.

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Frequently asked questions

What type of terminal does the Siemens 3RH1921-2CA01 use?

The Siemens 3RH1921-2CA01 utilizes spring-type terminals. These terminals allow for quick, tool-free wiring, providing a secure and vibration-resistant connection, which is beneficial for industrial environments.