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Siemens 3TH2040-0JB4 4NO Contactor Relay - 24V DC

Siemens 3TH2040-0JB4 Contactor Relay with 4 NO Contacts

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ManufacturerSiemens

Part number3TH2040-0JB4

Part Number 3TH2040-0JB4

Manufacturer Siemens

Type Contactor Relay

Contacts 4 NO

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4 Normally Open Contacts 24V DC Coil Voltage Built-in Suppression Diode Screw Terminals Conforms to EN 50011

Product description

The Siemens 3TH2040-0JB4 is a contactor relay featuring 4 normally open (NO) contacts, designed for DC operation with a 24V DC coil voltage. It conforms to EN 50011 standards and includes a built-in diode for surge suppression.

This relay is suitable for control circuits in industrial automation, machine tools, and control panels where reliable switching of control signals is required. Its compact design and screw terminals facilitate easy installation.

Stanlo Automation, a veteran-owned surplus distributor, offers the Siemens 3TH2040-0JB4. While this is a phased-out product, we can help you source this specific part for existing systems or as a replacement, ensuring your machinery continues to operate.

Technical specifications

Part Number	3TH2040-0JB4
Manufacturer	Siemens
Type	Contactor Relay
Contacts	4 NO
Coil Voltage	24V DC
Standard	EN 50011
Terminal Type	Screw Terminal
Built-in Diode	Yes

Common applications

Control circuits

Industrial automation

Machine tools

Control panels

Relay logic systems

Compatible systems

Control circuits requiring 4 NO contacts and 24V DC operation

Also known as

Siemens 4NO Relay 3TH2040 Contactor DC Contactor Relay 24V

Replaces / compatible with

This is a phased-out product. The successor is the Siemens SIRIUS 3RH21 series.

Technical note

Expert tip

Ensure the built-in diode is correctly oriented if using with a PLC output that may not have its own suppression.

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Frequently asked questions

What is the coil voltage for the Siemens 3TH2040-0JB4 contactor relay?

The Siemens 3TH2040-0JB4 contactor relay is designed for DC operation and has a coil voltage of 24V DC. It is crucial to use the correct voltage to ensure proper functioning and prevent damage.