Thermal overload relay for MC50a-65a series contactor, current 28-40A MT-63 28-40A

Thermal overload relay – motor protection and installation safety

The MT-63 thermal overload relay is a key element in protecting electric motors from overload. Designed to work with MC50a-65a series contactors, it provides reliable protection against damage caused by excessive load, which translates to a longer motor life and minimized repair costs. Thanks to its precise operation, the relay protects not only the motor itself but also the other elements of the electrical installation.

Construction and application

The MT-63 relay is an essential element in every motor control system. Its task is to monitor the current flowing through the motor and disconnect the power supply if the permissible value is exceeded. The construction based on the principle of thermal reaction provides effective protection against overloads, and the ability to adjust the current range allows the device to be adapted to specific application needs. The relay finds application in a wide range of industrial, commercial installations and in household appliances powered by electric motors.

Characteristics and benefits

• Wide adjustment range: The MT-63 relay offers a current adjustment range of 28-40A, allowing it to be used with various types of motors with power adapted to needs.
• Tripping class 10A: Ensures a quick response to overloads, minimizing the risk of motor damage.
• Compliance with standards: The device meets the requirements of IEC 60947-4-1 and IEC 60947-5-1 standards, guaranteeing safety and reliability. It also has CE, UL and CCC certificates.
• High resistance to environmental conditions: Operation in ambient temperature from -30°C to +65°C (storage) and -25°C to +60°C (operation) ensures reliability even in harsh industrial conditions.
• Solid construction: Made of high-quality materials guarantees long life and resistance to mechanical damage.
• Easy installation: Compact dimensions (55mm x 86mm x 100mm) and the possibility of mounting on a flat surface facilitate the installation of the relay in tight spaces.
• Trip indicator: A built-in indicator visually informs about the operation of the relay and the need for a reset.
• Stop/Test button: Allows testing the functionality of the relay and stopping the motor operation if necessary.

The current range is 28-40A, the tripping class is 10A, the rated insulation voltage (Ui) is 690V, the rated operating voltage (Ue) is 690V, the impulse voltage (Uimp) is 6kV, the ambient temperature during storage is -30°C to +65°C, and during operation -25°C to +60°C. The degree of protection is IP20.

The MT-63 thermal overload relay is an investment in the safety and reliability of your electrical installation. It provides effective protection of motors against overloads, minimizing the risk of failures and downtime in production. By choosing this product, you gain confidence in the long-term and trouble-free operation of your devices.