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Siemens 3RH1921-2DE11 Lateral Auxiliary Switch - 1 NO, 1 NC

Siemens 3RH1921-2DE11 Encapsulated Lateral Auxiliary Switch (1 NO, 1 NC).

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ManufacturerSiemens

Part number3RH1921-2DE11

Contact Configuration 1 NO, 1 NC

Terminal Type Spring-Type Terminal

Mounting Lateral

Series SIRIUS 3RH19

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1 NO and 1 NC encapsulated contacts Spring-type terminals for rapid connection Lateral mounting Solid-state compatible Suitable for dusty environments SIRIUS quality

Product description

The Siemens 3RH1921-2DE11 is a laterally mountable auxiliary switch featuring one normally open (NO) and one normally closed (NC) contact. It is designed for use with Siemens 3RT1 contactors and features spring-type terminals for easy and secure wiring. The 'encapsulated' nature of the contacts makes it compatible with solid-state circuits and resistant to dusty environments.

This auxiliary switch is ideal for applications requiring reliable signaling and control, particularly in environments with dust or where compatibility with solid-state logic is needed. It is used in various industrial automation applications, including motor control and control panel building.

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Technical specifications

Contact Configuration	1 NO, 1 NC
Terminal Type	Spring-Type Terminal
Mounting	Lateral
Series	SIRIUS 3RH19
Compatibility	Siemens 3RT1 Contactors
Encapsulated	Yes
IP Rating	IP20 (Front)
Insulation Voltage	500V AC

Common applications

Motor Control

Control Panels

Industrial Automation

Solid-State Circuits

Dusty Environments

Machine Safety

Compatible systems

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

Also known as

Siemens SIRIUS 3RH1921-2DE11 3RH1921-2DE11 Siemens Sealed Lateral Auxiliary Contact

Replaces / compatible with

This laterally mounted auxiliary switch expands the functionality of Siemens 3RT1 contactors, offering a sealed contact design for enhanced reliability in challenging environments.

Technical note

Expert tip

The encapsulated contacts provide high contact reliability, especially in applications with low switching loads (>=1mA at 17V). Ensure proper snap-on mounting to the 3RT1 contactor for secure operation.

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Frequently asked questions

What does 'encapsulated' mean for the Siemens 3RH1921-2DE11 auxiliary switch?

The 'encapsulated' design of the Siemens 3RH1921-2DE11 means its contacts are sealed, protecting them from dust and contaminants. This makes it particularly suitable for use in dusty industrial atmospheres and also ensures compatibility with solid-state control circuits that require a minimum switching current.