Siemens SIRIUS Contactor Relay 3RH1140-2BB40

Description

This is a used but fully functional Siemens SIRIUS contactor relay, model 3RH1140-2BB40. It is a size S00 auxiliary contactor designed for reliable switching of control circuits. This unit operates with a 24V DC coil and provides four normally open (4NO) contacts. It comes complete with a 3RT1916-1BB00 surge suppressor with LED, providing extra protection for your control system. Ideal for maintenance, repair, and operations (MRO) to keep legacy systems running smoothly.

Specifications

• Manufacturer: Siemens
• Type: 3RH1140-2BB40
• Series: SIRIUS
• Coil Voltage: 24V DC
• Contacts: 4 Normally Open (4NO)
• Size: S00
• Connection Type: Screw terminals
• Included Accessory: 3RT1916-1BB00 Surge Suppressor

Label Info

• le AC-12: 10 A
• Ui: 690V
• AC-15 @ 230V: 6 A
• Standards: IEC 60947, VDE 0660

Application

This contactor relay is commonly used in industrial automation for interlocking, signaling, and control functions within motor control centers, PLC systems, and various machine control panels.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this pre-owned component, you are contributing to the circular economy and have helped avoid approximately 8.8 kg of CO2 emissions associated with the production of a new part.

Availability

This item is a used, tested, and functional component. Available for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

Is this 3RH1140-2BB40 a direct replacement for a relay with an AC coil?

No, this model has a 24V DC coil. You must use a relay with the correct coil voltage and type (AC or DC) that matches your control circuit specifications to prevent damage.

This is a surge suppressor (varistor with LED). It is designed to protect the control circuit, particularly PLC outputs, from voltage spikes that can occur when the relay's coil is de-energized.

Yes, the Siemens SIRIUS S00 series allows for front-mounted auxiliary contact blocks to be snapped on, expanding the number of available contacts for your application.

Last Update: Friday, March 13, 2026

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