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Siemens 3RH2911-1GA31 Front Auxiliary Switch - 3 NO + 1 NC

Siemens 3RH2911-1GA31 front auxiliary switch with 3 NO + 1 NC contacts.

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ManufacturerSiemens

Part number3RH2911-1GA31

Mounting Front

Contacts 3 NO, 1 NC

Terminals Screw

Coding Physical

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CAGE: 9NK75

Front mounting 3 NO + 1 NC contacts Screw terminal connections Physically coded for compatibility For 3RH2140/3RH2440 contactor relays

Product description

The Siemens 3RH2911-1GA31 is a front-mounting auxiliary switch designed for compatibility with Siemens contactor relays 3RH2140 and 3RH2440. This unit provides a configuration of three normally open (NO) contacts (terminals 53/54, 61/62, 73/74) and one normally closed (NC) contact (terminals 83/84). It utilizes screw terminals for secure connections and is physically coded for specific application requirements.

This auxiliary switch is ideal for applications requiring multiple signaling contacts (NO) and a single circuit interruption (NC) contact. It finds use in industrial automation systems, control panels, and safety circuits where precise control and feedback are essential.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Siemens 3RH2911-1GA31. We are committed to providing high-quality, cost-effective solutions to keep your operations running smoothly.

Technical specifications

Mounting	Front
Contacts	3 NO, 1 NC
Terminals	Screw
Coding	Physical
For	3RH2140, 3RH2440
Series	3RH29

Common applications

Control logic

Signaling

Industrial automation

Safety circuits

Motor control

Compatible systems

Siemens 3RH2140 Contactor Relays Siemens 3RH2440 Contactor Relays

Also known as

Siemens 3RH29111GA31 Siemens 3 NO 1 NC auxiliary contact

Replaces / compatible with

This auxiliary switch is designed for combination with Siemens 3RH2140 and 3RH2440 contactor relays, providing a predominant number of NO contacts.

Technical note

Expert tip

The physical coding of the 3RH2911-1GA31 ensures proper and secure attachment to the Siemens 3RH2140 and 3RH2440 contactor relays.

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Frequently asked questions

What are the terminal numbers for the NO and NC contacts on the Siemens 3RH2911-1GA31?

The Siemens 3RH2911-1GA31 has three normally open (NO) contacts on terminals 53/54, 61/62, and 73/74, and one normally closed (NC) contact on terminals 83/84.