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Siemens 3RH1921-2HA31 SIRIUS Auxiliary Switch Block - 3 NO + 1 NC

Siemens SIRIUS 4-pole auxiliary switch block with 3 NO + 1 NC contacts.

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ManufacturerSiemens

Part number3RH1921-2HA31

Contact Configuration 3 NO + 1 NC

Poles 4

Standard EN 50005

Terminal Type Spring-type

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Veteran-owned

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3 NO + 1 NC contacts 4-pole design Spring-type connection system EN 50005 standard SIRIUS system compatibility

Product description

The Siemens 3RH1921-2HA31 is a 4-pole auxiliary switch block designed for use with Siemens motor contactors and contactor relays. It features a configuration of 3 Normally Open (NO) and 1 Normally Closed (NC) contacts, utilizing a spring-type connection system for enhanced reliability. This block is compliant with the EN 50005 standard.

This auxiliary switch block is an essential component for expanding control capabilities in industrial automation. It provides additional contacts for signaling, interlocking, and implementing complex control logic within motor control systems and panels. The spring-type terminals offer a secure connection, even under challenging operating conditions.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RH1921-2HA31. We provide quality industrial automation components to keep your systems running efficiently. Source your critical spare parts from Stanlo Automation and benefit from our expertise and value.

Technical specifications

Contact Configuration	3 NO + 1 NC
Poles	4
Standard	EN 50005
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

3RH19212HA31, Siemens 3RH1921-2HA31, SIRIUS 3RH1921-2HA31

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 terminals on the 3RH1921-2HA31 provide a secure and vibration-resistant connection, essential for reliable operation in demanding industrial environments.

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Frequently asked questions

What are the contact specifications for the Siemens 3RH1921-2HA31 auxiliary switch block?

The Siemens 3RH1921-2HA31 auxiliary switch block is equipped with 3 Normally Open (NO) and 1 Normally Closed (NC) instantaneous contacts. It is designed as a 4-pole unit and features a spring-type connection system.