Enameled flat wire is a magnet wire with a rectangular conductor featuring rounded corners (R corners). It is defined by parameters such as the conductor thickness and width, the thermal class of the enamel, and the thickness and type of the enamel coating. The conductor can be copper, copper alloy, or CCA (Copper-Clad Aluminum).
Compared with round wire, flat wire offers incomparable advantages and characteristics, and is applied in a wide range of fields, such as inductors, transformers, electric motors, instrument transformers, voice coils, and solenoid valves.
PEEK is one type of insulation which is used less often compared to AIW, EIAIW, UEW insulation due to difficulty of manufacturing and customized PEEK-insulated magnet wires and enameled flat wires are mostly designed for aerospace, medical, and electric vehicle motor applications. It has excellent thermal stability, withstanding temperatures up to 260°C and features:
High Dielectric Strength → Modified PEEK for stable performance under high-voltage surges.
Precision R-Corner → Uniform edge coating to minimize electric fields and reduce AC losses.
Excellent Adhesion + Low WVTR → Advanced melt blending for a tight copper bond that blocks moisture and prevents delamination.
Extreme Durability → Continuous operation above 240°C, highly resistant to ATF, refrigerants, and solvents.
Advantages when used for the following applications:
PEEK-insulated copper wire fits for 800V+ hairpin windings, and can meet stringent requirements for corona
resistance and high power density for drive motors of Evs, it can enhance the efficiency of solar, wind, and rail
traction inverters while reducing equipment footprint for hf transformers and it helps coil windings of aerospace
motors operate reliably under extreme temperatures, vacuum, and high-radiation environments.
If you want to develop a PEEK insulated copper wire, please feel free to reach out.
Post time: Nov-04-2026
