Class F Round Aluminum Enameled Wire for Motor Coils is aluminum (Al) wire coated 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 wire coils.

Class f Aluminum Triple Insulated Enameled Wire Electromagnetic Coils
Enameled Aluminum Winding 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 insulation?
The thermal index of electrical wire insulation 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 usually expressed as 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 usually expressed in degrees Celsius. For example, a wire with a TI of 130°C means that the insulation can withstand continuous operation at temperatures of 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 in the form of a voltage, with higher CTI values indicating better resistance to leakage tracing.CTI is essential for evaluating 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 indices are usually specified by standards organizations 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, resistance to leakage and starting traces, 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.