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Siemens 3RH1131-1KB40 24V DC Contactor Relay - 3 NO / 1 NC with Varistor

Siemens 3RH1131-1KB40 Contactor Relay, 3 NO + 1 NC, 24V DC, w/ Varistor.

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ManufacturerSiemens

Part number3RH1131-1KB40

Part Number 3RH1131-1KB40

Manufacturer Siemens

Type Contactor Relay

Coil Voltage 24V DC

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CAGE: 9NK75

3 Normally Open Contacts 1 Normally Closed Contact 24V DC Coil Voltage Integrated Varistor for Surge Suppression Screw Terminals Size S00

Product description

The Siemens 3RH1131-1KB40 is a contactor relay from the SIRIUS 3RH11 series, equipped with 3 normally open (NO) and 1 normally closed (NC) auxiliary contacts. It operates with a 24V DC coil voltage with a control voltage range of 0.7 to 1.25* Us and features an integrated varistor for surge suppression. This size S00 relay utilizes screw terminals. It is a phased-out product, with the preferred successor being the 3RH2131-1KB40.

This relay is suitable for DC control circuits in industrial automation where protection against voltage surges is required. Applications include motor control, automation panels, and machine control systems that benefit from enhanced electrical protection.

As a veteran-owned surplus parts distributor, Stanlo Automation is your go-to source for discontinued industrial automation components like the Siemens 3RH1131-1KB40. We provide cost-effective solutions to maintain and repair your existing systems, ensuring operational continuity and minimizing unexpected expenses.

Technical specifications

Part Number	3RH1131-1KB40
Manufacturer	Siemens
Type	Contactor Relay
Coil Voltage	24V DC
Auxiliary Contacts	3 NO + 1 NC
Protection	With Varistor
Terminal Type	Screw terminal
Size	S00
Series	SIRIUS 3RH11

Common applications

DC Control Circuits

Industrial Automation

Motor Control

Control Panels

Surge Protection

Machine Control

Compatible systems

DC control circuits requiring 3 NO and 1 NC auxiliary contacts Automation systems needing enhanced protection against voltage surges

Also known as

Siemens 3RH1131-1KB40 SIRIUS 3RH11 Relay w/ Varistor Siemens 24V DC Contactor Relay

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RH2131-1KB40.

Technical note

Expert tip

The integrated varistor provides effective clamping of voltage transients, safeguarding the relay coil and connected components.

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Frequently asked questions

What benefit does the varistor provide on the Siemens 3RH1131-1KB40?

The Siemens 3RH1131-1KB40 includes an integrated varistor, which offers protection against transient overvoltages. This is crucial for extending the lifespan and reliability of the relay and associated control circuitry in environments prone to electrical noise.