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Siemens 3RH1921-2HA22 SIRIUS Auxiliary Switch Block - 2 NO + 2 NC

Siemens SIRIUS 4-pole auxiliary switch block with 2 NO + 2 NC contacts.

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ManufacturerSiemens

Part number3RH1921-2HA22

Contact Configuration 2 NO + 2 NC

Poles 4

Standard EN 50012

Terminal Type Spring-type

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2 NO + 2 NC contacts 4-pole design Spring-type connection system EN 50012 standard SIRIUS system compatibility

Product description

The Siemens 3RH1921-2HA22 is a 4-pole auxiliary switch block from the SIRIUS line, designed for motor contactors. It features a 2 Normally Open (NO) and 2 Normally Closed (NC) contact configuration, adhering to the EN 50012 standard. The block utilizes a spring-type connection system for robust and reliable electrical connections.

This auxiliary switch block is engineered to enhance the functionality of Siemens motor contactors and contactor relays. It is used in industrial control systems for applications such as motor control, signaling, and implementing safety interlocks. The spring-type terminals ensure a secure connection, even in environments prone to vibration.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RH1921-2HA22. We provide essential industrial automation components, ensuring quality and value for your operations. Trust Stanlo Automation for your critical spare parts needs.

Technical specifications

Contact Configuration	2 NO + 2 NC
Poles	4
Standard	EN 50012
Terminal Type	Spring-type
Application	Motor Contactors

Common applications

Motor Control

Industrial Automation

Control Panels

Signaling

Safety Circuits

Compatible systems

Compatible with Siemens SIRIUS 3RT motor contactors and 3RH contactor relays

Also known as

3RH19212HA22, Siemens 3RH1921-2HA22, SIRIUS 3RH1921-2HA22

Replaces / compatible with

This is a phased-out product. The successor is the SIRIUS 3RH2 series. Please verify compatibility with your specific application.

Technical note

Expert tip

The spring-type connection system on the 3RH1921-2HA22 ensures a vibration-resistant and secure connection, essential for maintaining signal integrity in industrial settings.

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Frequently asked questions

What are the contact specifications for the Siemens 3RH1921-2HA22 auxiliary switch block?

The Siemens 3RH1921-2HA22 auxiliary switch block is equipped with 2 Normally Open (NO) and 2 Normally Closed (NC) instantaneous contacts. It is designed as a 4-pole unit.