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Siemens 3RH1921-1EA11 Lateral Auxiliary Switch - 1 NO, 1 NC

Siemens 3RH1921-1EA11 lateral auxiliary switch with 1 NO and 1 NC contact.

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ManufacturerSiemens

Part number3RH1921-1EA11

Contacts 1 NO, 1 NC

Mounting Lateral (First side)

Terminal Type Screw

For use with Siemens 3RT1 Contactors

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12-month warranty

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Veteran-owned

CAGE: 9NK75

Provides 1 Normally Open (NO) and 1 Normally Closed (NC) contact Screw terminals for secure wiring Lateral mounting for 3RT1 contactors Expands control and signaling capabilities Reliable Siemens quality

Product description

The Siemens 3RH1921-1EA11 is a first lateral auxiliary switch designed for side mounting on Siemens 3RT1 series contactors. This unit is equipped with both one normally open (NO) and one normally closed (NC) contact, offering versatile control options. It utilizes screw terminals for secure electrical connections.

This auxiliary switch is essential for adding extra signaling and control functions to contactors, enabling complex automation sequences. The combination of NO and NC contacts allows for sophisticated interlocking, feedback, and status indication in motor control systems, control panels, and machinery across various industries such as manufacturing and material handling.

Stanlo Automation, a veteran-owned surplus distributor, offers the Siemens 3RH1921-1EA11. We specialize in providing high-quality industrial automation components, including hard-to-find and surplus items. Sourcing from Stanlo ensures you receive reliable parts backed by dedicated customer service.

Technical specifications

Contacts	1 NO, 1 NC
Mounting	Lateral (First side)
Terminal Type	Screw
For use with	Siemens 3RT1 Contactors
Series	3RH19

Common applications

Motor control

Automation systems

Control panels

Industrial machinery

Safety circuits

Status monitoring

Compatible systems

Siemens 3RT1 Contactors

Also known as

Siemens 3RH1921-1EA11 NO NC auxiliary Siemens 3RT1 lateral switch 3RH1921-1EA11 Siemens combination switch

Replaces / compatible with

Adds combined NO and NC auxiliary contacts to the side of Siemens 3RT1 contactors, enhancing their control and feedback capabilities.

Technical note

Expert tip

When mounting the 3RH1921-1EA11 on the 'first lateral' side of a 3RT1 contactor, ensure no other accessories occupy adjacent mounting positions.

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Frequently asked questions

What are the contact configurations available on the Siemens 3RH1921-1EA11 auxiliary switch?

The Siemens 3RH1921-1EA11 features a combination of one normally open (NO) contact and one normally closed (NC) contact. This dual configuration allows for versatile implementation in control and signaling circuits for 3RT1 contactors.