Schneider Electric LRD03 Thermal Overload Relay 0.25-0.4A

The Schneider Electric LRD03 is a precision-engineered thermal overload relay specifically designed to provide robust protection for electric motors. With an adjustable current setting range of 0.25 to 0.4A, this device serves as a critical safety component in industrial automation, effectively monitoring current flow to prevent damage caused by thermal overloads or phase failures. Its compact design and reliable performance make it an ideal choice for integrating into complex electrical control systems where motor longevity and operational safety are paramount.

Advantages

This thermal overload relay offers exceptional reliability in protecting sensitive motor equipment from overheating and electrical faults. By allowing for precise current adjustment within the specified range, it ensures that the protection threshold is perfectly matched to the motor's requirements, thereby minimizing the risk of nuisance tripping while maintaining high safety standards. Its durable construction and compatibility with standard industrial control systems facilitate seamless installation and long-term operational stability in demanding environments.

Suitable for

• Industrial motor control circuits
• Protection of small electric motors
• Automation systems in manufacturing
• Electrical distribution panels

This device may not be suitable for applications requiring current ranges outside of the 0.25 to 0.4A threshold. It is also not intended for use in high-voltage power distribution systems exceeding its rated insulation voltage or for applications where electronic soft-start or variable frequency drive protection is already integrated and sufficient.

Key specifications

• Adjustable current range: 0.25 to 0.4A
• Rated insulation voltage: 690V
• Weight: 124g
• Color: Multicolour

To use the Schneider Electric LRD03, mount the relay directly onto the compatible contactor using the integrated connection terminals. Once installed, adjust the dial on the front of the unit to the specific full-load current rating of the motor being protected. Ensure that all wiring connections are tightened to the manufacturer's torque specifications to prevent loose contacts and potential overheating. The device will automatically trip the control circuit if the current exceeds the set threshold, protecting the motor from thermal damage.

What to consider before purchase

• Verify that the motor's full-load current falls within the 0.25 to 0.4A range
• Ensure compatibility with your existing contactor model
• Check the environmental conditions of the installation site

Usage recommendations: Regularly inspect the relay for any signs of wear or loose connections. After a trip event, investigate the cause of the overload before manually resetting the device to ensure safe continued operation.