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Siemens 3RH1921-1LA20 Auxiliary Switch Block - 2 NC

Siemens 3RH1921-1LA20 2-pole auxiliary switch block with 2 NC contacts.

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ManufacturerSiemens

Part number3RH1921-1LA20

Contacts 2 NC

Poles 2

Terminal Type Screw

Standards EN 50005

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CAGE: 9NK75

2 NC configuration Screw terminal connections EN 50005 compliant Cable entry at the top Phased-out product

Product description

The Siemens 3RH1921-1LA20 is a 2-pole auxiliary switch block featuring 2 normally closed (NC) contacts. It is designed for motor contactors and adheres to EN 50005 standards. This block has cable entry at the top and uses screw terminals for connection.

This auxiliary switch is ideal for applications requiring only normally closed contacts for control or interlocking functions. It's commonly utilized in industrial control panels, motor starters, and automation systems where precise switching is needed.

Stanlo Automation, a veteran-owned surplus parts distributor, ensures you can source necessary components like the Siemens 3RH1921-1LA20. We are committed to providing reliable parts for your industrial needs.

Technical specifications

Contacts	2 NC
Poles	2
Terminal Type	Screw
Standards	EN 50005
Cable Entry	Top
Product Type	Auxiliary Switch Block

Common applications

Motor control

Control panels

Automation systems

Safety circuits

Interlocking

Feedback signaling

Compatible systems

Siemens Motor Contactors (verify specific model and size)

Also known as

Siemens 3RH1921-1LA20 SIRIUS auxiliary switch Siemens 2NC auxiliary

Replaces / compatible with

This is a phased-out product. The successor is the SIRIUS 3RH2 series.

Technical note

Expert tip

The top cable entry on this auxiliary switch block can be advantageous for routing wires in confined control panel layouts.

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Frequently asked questions

What type of contacts are included in the Siemens 3RH1921-1LA20 auxiliary switch block?

The Siemens 3RH1921-1LA20 auxiliary switch block is equipped with 2 normally closed (NC) contacts, suitable for specific control and safety applications.