Schneider Electric Thermal Overload Relay 37-50A LR2D3357

Description

The Schneider Electric LR2D3357 is a robust thermal overload relay from the TeSys D series, engineered for the protection of motors against overheating. It offers a precise adjustment range from 37A to 50A, ensuring reliable performance for a variety of industrial applications. This model is designed for direct mounting onto TeSys D contactors, creating a compact and efficient motor starter assembly.

Specifications

• Manufacturer: Schneider Electric
• Type: LR2D3357
• Product Range: TeSys D
• Thermal Setting Range: 37 to 50 A
• Rated Insulation Voltage (Ui): 1000 V AC
• Rated Impulse Withstand Voltage (Uimp): 6 kV
• Trip Class: Class 10A conforming to IEC 60947-4-1
• Mounting: Direct on contactor (LC1D40...LC1D95) or separate on DIN rail

Label Info

• Model: LR2D3357
• Part Number: 023295
• EAN: 3389110232960

Application

This thermal overload relay is ideal for standard motor protection in applications such as pumps, fans, conveyors, and machine tools. It provides essential protection against phase failure and overload conditions, prolonging motor life and preventing costly downtime.

Country of Origin

This product was manufactured in France.

CO2 Impact

Choosing this reused component saves an estimated 20.0 kg of CO2 compared to a new one. This saving is equivalent to the emissions from driving a standard car for 100 km.

Availability

This item is in stock and ready for immediate dispatch. Order now from PLC2Day for expert support and fast delivery.

FAQ

Class 10A, like this LR2D3357, will trip within 10 seconds at 600% of the set full-load current. This is suitable for standard motor starting conditions. Class 20 relays allow for a longer starting time (up to 20 seconds) and are used for motors with high-inertia loads.

Yes, while it's designed for direct mounting on LC1D contactors (specifically models LC1D40 to LC1D95), it can also be mounted on a DIN rail using a separate mounting adapter, such as the LA7D3064.

The current dial should be set to the motor's full-load ampere (FLA) rating, which is found on the motor's nameplate. The numbers on the dial directly correspond to the full-load motor currents, ensuring accurate thermal protection.

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Last Update: March 13, 2026