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Siemens 3RH1921-1FA40: 4 NO Attachable Auxiliary Block

Siemens 3RH1921-1FA40: 4 NO attachable auxiliary contact block.

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ManufacturerSiemens

Part number3RH1921-1FA40

Type Attachable Auxiliary Block

Contacts 4 NO

Standards EN 50005

Series SIRIUS 3RH19

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4 normally open (NO) contacts Attachable design EN 50005 compliant Provides multiple control/signal points

Product description

The Siemens 3RH1921-1FA40 is an attachable auxiliary contact block featuring four normally open (NO) contacts. This block complies with EN 50005 standards and is designed for easy attachment to compatible Siemens contactors, enhancing their control capabilities by providing multiple signaling or initiating circuits.

This auxiliary block is ideal for applications requiring numerous normally open contacts, such as activating multiple devices, indicating operational status, or implementing complex control sequences in industrial automation systems.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RH1921-1FA40. We are dedicated to providing access to essential industrial automation components, including obsolete and hard-to-find parts, to ensure your systems remain functional. Trust Stanlo Automation for your surplus automation needs.

Technical specifications

Type	Attachable Auxiliary Block
Contacts	4 NO
Standards	EN 50005
Series	SIRIUS 3RH19

Common applications

Control panels

Motor starters

Signaling systems

Sequence control

Automation systems

Industrial machinery

Compatible systems

Compatible with Siemens Contactors (S0-S12)

Also known as

Siemens 3RH19 4NO 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

Ensure the 3RH1921-1FA40 is correctly seated and locked onto the contactor to prevent any potential issues with contact activation or durability.

What happens next?

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Frequently asked questions

What is the contact configuration of the Siemens 3RH1921-1FA40 attachable block?

The Siemens 3RH1921-1FA40 attachable block is equipped with four normally open (NO) contacts. This configuration adheres to EN 50005 standards and is suitable for control and signaling functions in automation systems.