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Siemens 3RH2911-1GA04 Front Auxiliary Switch - 4 NC Contacts

Siemens 3RH2911-1GA04 front auxiliary switch with 4 NC contacts.

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ManufacturerSiemens

Part number3RH2911-1GA04

Mounting Front

Contacts 4 NC

Terminals Screw

Coding Physical

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Front mounting 4 Normally Closed (NC) contacts Screw terminal connections Physically coded for compatibility Specifically for 3RH2140/3RH2440

Product description

The Siemens 3RH2911-1GA04 is a front-mounting auxiliary switch specifically designed for use with Siemens contactor relays 3RH2140 and 3RH2440. This unit is equipped with four normally closed (NC) contacts, identified by terminals 51/52, 61/62, 71/72, and 81/82. It features screw terminals for connection and is physically coded for specific compatibility.

This auxiliary switch is essential in applications requiring multiple signals for circuit interruption or status indication. It is commonly used in safety circuits, interlocking systems, and control logic where reliable opening of circuits is a primary function, particularly in machinery and industrial process automation.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RH2911-1GA04. We provide reliable, cost-effective solutions for your industrial automation needs, ensuring minimal downtime for your operations.

Technical specifications

Mounting	Front
Contacts	4 NC
Terminals	Screw
Coding	Physical
For	3RH2140, 3RH2440
Series	3RH29

Common applications

Safety circuits

Interlocking

Control logic

Circuit interruption

Industrial machinery

Compatible systems

Siemens 3RH2140 Contactor Relays Siemens 3RH2440 Contactor Relays

Also known as

Siemens 3RH29111GA04 Siemens 4 NC auxiliary contact

Replaces / compatible with

This auxiliary switch is designed for combination with Siemens 3RH2140 and 3RH2440 contactor relays, according to EN 50011.

Technical note

Expert tip

The physical coding of the 3RH2911-1GA04 ensures correct and safe mounting onto compatible Siemens 3RH2140 and 3RH2440 contactor relays.

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Frequently asked questions

What specific Siemens contactor relays is the 3RH2911-1GA04 auxiliary switch compatible with?

The Siemens 3RH2911-1GA04 auxiliary switch is designed for use exclusively with Siemens contactor relays 3RH2140 and 3RH2440, according to EN 50011 standards.