Genius MT03A Thermal Overload Relay, 0.11 - 0.17A

The Genius MT03A thermal overload relay is a high-precision electrical protection component engineered specifically for motor circuits. It provides essential safeguarding against thermal damage resulting from overloads or phase failures, ensuring the stability and operational integrity of electrical control systems in both industrial and commercial environments. By monitoring current flow within the specified range, this device helps prevent costly downtime and extends the service life of connected electric motors.

Advantages

This thermal overload relay offers exceptional reliability through its precise calibration and robust construction. Its adjustable current range allows for fine-tuned protection tailored to the specific requirements of the motor, minimizing the risk of nuisance tripping while maintaining a high level of safety. The compact design facilitates easy integration into existing control panels, providing a space-efficient solution for modern electrical installations.

Suitable for

• Industrial motor control centers
• Commercial HVAC systems
• Automated manufacturing machinery
• Pump and compressor control circuits

When it may not be suitable

This device is not intended for use in circuits where the motor current falls outside the 0.11 to 0.17A range. It is also not designed to provide protection against short-circuit currents, which must be managed by separate circuit breakers or fuses.

Key specifications

• Current adjustment range: 0.11 - 0.17A
• Device type: Thermal overload relay
• Application: Motor protection
• Function: Overload and phase failure detection

How to use

The relay should be installed directly onto the corresponding contactor or mounted on a DIN rail depending on the specific system configuration. Once installed, the current setting must be adjusted using the integrated dial to match the full-load current rating of the motor being protected. Ensure all electrical connections are tightened to the manufacturer's torque specifications to prevent overheating at the terminals.

What to consider before purchase

• Verify the full-load current rating of your motor matches the 0.11 - 0.17A range
• Ensure compatibility with your existing contactor model
• Confirm the environmental conditions meet the operating temperature requirements

Usage recommendations

Regularly inspect the relay for signs of wear or thermal discoloration and perform periodic testing of the trip mechanism to ensure continued operational safety.