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Siemens 3RH1921-1FC22: 2 NO + 2 NC Auxiliary Switch Block

Siemens 3RH1921-1FC22: 2 NO + 2 NC front auxiliary switch block.

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ManufacturerSiemens

Part number3RH1921-1FC22

Type Auxiliary Switch Block

Contacts 2 NO + 2 NC

Mounting Front

Terminal Type Screw

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2 NO + 2 NC contact configuration Front mounting Screw terminal connections EN 50005 compliant For Siemens contactors S0-S12

Product description

The Siemens 3RH1921-1FC22 is an auxiliary switch block designed for front mounting on Siemens motor contactors, sizes S0 through S12. It features a mixed configuration of two normally open (NO) and two normally closed (NC) contacts, adhering to EN 50005 standards. This block utilizes screw terminals for secure and reliable connections.

This versatile auxiliary switch block is employed in various industrial automation applications, including motor control systems, control panels, and machine safety interlocks. The combination of NO and NC contacts allows for sophisticated control logic, status feedback, and safety monitoring.

As a veteran-owned surplus parts distributor, Stanlo Automation is committed to providing essential industrial automation components. We offer parts like the Siemens 3RH1921-1FC22, ensuring that you can source even phased-out or hard-to-find items to maintain your critical systems. Rely on Stanlo Automation for your automation part requirements.

Technical specifications

Type	Auxiliary Switch Block
Contacts	2 NO + 2 NC
Mounting	Front
Terminal Type	Screw
Standards	EN 50005
Contactor Size Compatibility	S0 to S12
Series	SIRIUS 3RH19

Common applications

Motor control

Control panels

Machine interlocks

Industrial automation

Safety circuits

Status feedback

Compatible systems

Siemens 3RT Series Motor Contactors (S0-S12)

Also known as

Siemens 3RH19 Auxiliary Siemens 2NO 2NC Switch Contactor Auxiliary Contact

Replaces / compatible with

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

Technical note

Expert tip

Ensure the 3RH1921-1FC22 is correctly seated on the contactor before tightening the mounting screws to prevent damage or improper function.

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Frequently asked questions

What are the specifications for the Siemens 3RH1921-1FC22 auxiliary switch block?

The Siemens 3RH1921-1FC22 auxiliary switch block features a 2 NO + 2 NC contact configuration and uses screw terminals. It is designed for front mounting on Siemens contactors sizes S0 through S12 and meets EN 50005 standards.