Class F enameled aluminum round wire for motor coils is aluminum (Al) wire covered with a very thin insulating layer. It is used in the construction of transformers, inductors, motors, generators, loudspeakers, hard disk head actuators, electromagnets, electric guitar pickups, and other applications requiring tightly insulated spools.

Class F Triple Insulated Enameled Aluminum Wire for Solenoid Coils
Enameled Aluminum Wire for Electromagnetic Coils
Certifications: ISO9001, CCC, RoHS, SGS
Heat Resistance Class 130°C 155°C 180°C 200°C 120 °C 240°C
Type: PEW PEWF EIW AIEIW PVF PIW E


What is the thermal index of wire insulators?
The thermal index of a wire insulator is a set of parameters that provide information about the thermal aging characteristics of an insulating material. It is commonly used to evaluate the long-term thermal stability and performance of electrical insulation. 

The thermal index is typically expressed in terms of three key parameters:
Temperature Index (TI): This is the maximum temperature at which an insulating material can be used continuously for an extended period of time without significant degradation. The TI is generally expressed in degrees Celsius. For example, a wire with an IT of 130°C means that the insulation can withstand continuous operation at temperatures up to 130°C.

Relative Leakage Trace Index (CTI): This index measures the resistance of an insulating material to the formation of conductive paths (leakage traces) on its surface. It is expressed as a voltage, with higher CTI values indicating better resistance to leakage traces. CTI is essential for assessing the safety and reliability of electrical components.

Flame Retardant Index (FRI): This index provides information about the flame retardancy of an insulating material. It is expressed as a numerical value, with a higher FRI indicating better flame resistance.

These ratings are usually specified by standards bodies such as the International Electrotechnical Commission (IEC) or the National Electrical Manufacturers Association (NEMA). The thermal index is a key factor in determining the suitability of an insulation material for a particular application, especially in environments where temperature, leakage resistance and flame retardancy are key considerations. Engineers and manufacturers use these indices to select the right materials for a variety of electrical and electronic applications.