Telemecanique LR1-D40353 Thermal Overload Relay

Description

The Telemecanique LR1-D40353 is a high-quality 3-pole thermal overload relay designed for reliable motor protection. It features an adjustable current setting from 23 to 32 Amps and belongs to the robust TeSys D series. This relay mounts directly onto LC1-D40, LC1-D50, and LC1-D65 contactors, providing seamless integration into motor starter assemblies. It is engineered to protect AC motors against overloads, phase failure, and prolonged starting times.

Specifications

• Manufacturer: Telemecanique (Schneider Electric)
• Model: LR1-D40353
• Type: Thermal Overload Relay
• Current Setting Range: 23 A to 32 A
• Poles: 3-Pole
• Rated Insulation Voltage (Ui): 660V
• Auxiliary Contacts: 1 NO (Normally Open) + 1 NC (Normally Closed)
• Overload Trip Class: Class 10
• Mounting Style: Direct Contactor Mount

Label Info

• Brand: Telemecanique
• Model: LR1-D40353
• Compatibility: LC1-D/LP1-D contactors
• Standards: IEC, VDE, BS, UL, JEM

Application

Ideal for use in various industrial applications including conveyor systems, pumps, fans, and machine tools where reliable motor overload protection is critical. It ensures operational safety and helps prevent costly motor damage and downtime.

Country of Origin

Made in France.

CO2 Impact

By purchasing this pre-owned component, you are contributing to the circular economy and avoiding approximately 16 kg of CO2 emissions. This saving is equivalent to the emissions produced by driving a standard car for 80 kilometers.

Availability

This unit is a tested, pre-owned item in excellent working condition. Available for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

What is the function of the Class 10 trip characteristic on this relay?

Class 10 indicates that the relay will trip within 10 seconds when the motor is subjected to a locked rotor condition at 6 times its full-load ampere rating. This class is suitable for standard motors with normal starting times.

While designed for direct mounting on a contactor, it can be used as a standalone unit with the addition of a separate mounting adapter, such as the LA7D3064 terminal block.

You should set the current on the dial to match the Full Load Ampere (FLA) rating specified on the motor's nameplate. This ensures the relay provides accurate protection without nuisance tripping.

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Last Update: Friday, March 13, 2026