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Siemens 3RH1921-1FA22: 2 NO + 2 NC Attachable Auxiliary Block

Siemens 3RH1921-1FA22: 2 NO + 2 NC attachable auxiliary contact block.

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ManufacturerSiemens

Part number3RH1921-1FA22

Type Attachable Auxiliary Block

Contacts 2 NO + 2 NC

Standards EN 50005

Series SIRIUS 3RH19

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2 normally open (NO) and 2 normally closed (NC) contacts Attachable design EN 50005 compliant Versatile contact configuration

Product description

The Siemens 3RH1921-1FA22 is an attachable auxiliary contact block designed with a combination of two normally open (NO) and two normally closed (NC) contacts. It adheres to EN 50005 standards and is easily attachable to compatible Siemens contactors, providing versatile functionality for control and signaling circuits.

This block is ideal for complex control logic, interlocks, and status monitoring in industrial automation. It can be used in motor starters, control panels, and various machinery where a mix of NO and NC contacts is required for sequence control or safety functions.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RH1921-1FA22 to meet your industrial needs. We specialize in providing hard-to-find and obsolete components, ensuring your automation systems remain operational. Count on Stanlo Automation for reliable surplus parts.

Technical specifications

Type	Attachable Auxiliary Block
Contacts	2 NO + 2 NC
Standards	EN 50005
Series	SIRIUS 3RH19

Common applications

Control panels

Motor starters

Safety interlocks

Sequence control

Industrial machinery

Automation systems

Compatible systems

Compatible with Siemens Contactors (S0-S12)

Also known as

Siemens 3RH19 2NO 2NC Siemens Auxiliary Block Contactor Accessory

Replaces / compatible with

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

Technical note

Expert tip

Proper alignment and secure attachment of the 3RH1921-1FA22 to the contactor are essential for ensuring reliable operation of all four contacts.

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Frequently asked questions

What is the contact configuration for the Siemens 3RH1921-1FA22 attachable block?

The Siemens 3RH1921-1FA22 attachable block features a mixed configuration of two normally open (NO) and two normally closed (NC) contacts. This provides flexibility for various control and signaling requirements in industrial automation.