SCHNEIDER ELECTRIC LRD12

Schneider Electric LRD12 Thermal Overload Relay

Description

The Schneider Electric LRD12 is a TeSys LRD thermal overload relay designed for the protection of motors. It features a thermal setting range of 5.5 to 8A and is suitable for direct mounting on TeSys D contactors. This relay provides reliable protection against motor overload, phase failure, and excessively long starting times. It is equipped with manual and automatic reset options, a test facility, and clear trip indication.

Specifications

• Manufacturer: Schneider Electric
• Brand: Telemecanique
• Model: LRD12
• Product Range: TeSys LRD (TeSys Deca)
• Type: Differential Thermal Overload Relay
• Thermal Setting Range: 5.5…8 A
• Trip Class: Class 10A conforming to IEC 60947-4-1
• Rated Insulation Voltage (Ui): 690 V AC
• Auxiliary Contacts: 1 NO + 1 NC
• Mounting: Direct attachment to contactor or separate mounting base

Label Info

• 5.5 – 8A Adjustment Range
• Ui: 690V, Uimp: 6kV
• Standards: IEC/EN 60947-4-1, VDE 0660
• UL Listed 170M, IND.CONT.EQ.

Application

Ideal for use in industrial automation and control systems for motor protection in applications such as pumps, fans, conveyors, and machine tools. It ensures the longevity and safe operation of electric motors.

Country of Origin

Made in France.

CO2 Impact

By purchasing this reused component, you are helping to prevent the emission of approximately 5.0 kg of CO2. This is equivalent to the savings from not driving a car for 25 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the function of the blue ‘Reset’ button and how does it differ from the red ‘Stop’ button?

The blue button is used to reset the relay after a thermal trip has occurred. It can be set to manual or automatic reset mode. The red ‘Stop’ button manually trips the relay (simulating an overload) for testing purposes and can also be used to stop the motor circuit by opening the NC contact.

Can this LRD12 relay be mounted independently, or does it require a specific contactor?

The LRD12 is designed for direct mounting onto Schneider Electric TeSys D contactors (such as LC1D09 to LC1D38). However, it can also be mounted independently on a DIN rail using a separate mounting base, like the LAD7B106.

What does ‘Trip Class 10A’ signify for this thermal overload relay?

Trip Class 10A means the relay will trip within 10 seconds when the motor is subjected to a locked-rotor current that is 7.2 times the set current. This class is suitable for standard motor starting applications.

Last Update: Friday, March 13, 2026

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