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Siemens 3RH1921-1CA01 Front Auxiliary Switch - 1 NC, Screw Terminal

Siemens 3RH1921-1CA01 front auxiliary switch with 1 NC contact.

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ManufacturerSiemens

Part number3RH1921-1CA01

Contacts 1 NC

Mounting Front-side

Terminal Type Screw

For use with Siemens 3RT1 Contactors

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Veteran-owned

CAGE: 9NK75

1 Normally Closed (NC) contact Screw terminals for reliable connection Front-mounting design Expands control functionality of 3RT1 contactors High-quality Siemens component

Product description

The Siemens 3RH1921-1CA01 is a front-mounted auxiliary switch designed for Siemens 3RT1 series contactors. This unit provides one normally closed (NC) contact and features screw terminals for secure electrical connections. Its front-side mounting allows for easy integration and expansion of the control logic for existing contactors.

This auxiliary switch is crucial for implementing safety interlocks, feedback signaling, and status monitoring in various industrial applications. It is particularly useful in motor control circuits, automation systems, and machine control where accurate representation of the contactor's state is required. The NC contact can be used to break a control circuit when the main contactor is energized.

Sourced as surplus, the Siemens 3RH1921-1CA01 is available through Stanlo Automation, a veteran-owned distributor committed to providing reliable industrial parts. We ensure that surplus components meet quality standards, offering a cost-effective solution for your automation needs. Partner with Stanlo Automation for dependable service and a wide selection of industrial controls.

Technical specifications

Contacts	1 NC
Mounting	Front-side
Terminal Type	Screw
For use with	Siemens 3RT1 Contactors
Series	3RH19

Common applications

Motor control circuits

Safety interlocks

Status feedback

Industrial automation

Machine control systems

Compatible systems

Siemens 3RT1 Contactors

Also known as

Siemens 3RH1921-1CA01 NC auxiliary Siemens 3RT1 front switch 3RH1921-1CA01 Siemens auxiliary contact

Replaces / compatible with

Provides additional NC auxiliary contacts for Siemens 3RT1 series contactors, enabling expanded control and signaling capabilities.

Technical note

Expert tip

Ensure the 3RH1921-1CA01 is correctly aligned and firmly attached to the front of the 3RT1 contactor to guarantee reliable operation.

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Frequently asked questions

What type of contact does the Siemens 3RH1921-1CA01 auxiliary switch have?

The Siemens 3RH1921-1CA01 auxiliary switch features one normally closed (NC) contact. This NC contact is ideal for breaking a circuit when the main contactor is activated, serving purposes like safety interlocks or status signaling.