ISO certification polyester class 220 copper magnet wire refers to a type of insulated copper wire used for winding coils in electrical equipment, such as motors, transformers, and generators. 

Here's what each component of the term signifies:
Copper: Copper is the conductive material used as the core of the wire. It is known for its high electrical conductivity, making it an excellent choice for conducting electricity efficiently.

Magnet Wire: Magnet wire, also known as winding wire or enameled wire, is a type of wire that has a thin layer of insulation coating applied to it. This insulation helps prevent short circuits and electrical leakage when the wire is wound into coils.

Polyester: Polyester refers to the insulation material used in this particular wire. Polyester is a synthetic polymer known for its good thermal properties and resistance to moisture, oil, and most solvents. The polyester insulation helps protect the copper wire from environmental factors and ensures proper electrical insulation.

Class 220: Class 220 refers to the thermal class rating of the wire's insulation. Thermal class ratings classify the maximum operating temperature that the wire's insulation can withstand over an extended period. In this case, Class 220 indicates that the polyester insulation is designed to operate reliably at temperatures up to 220°C (428°F).

Polyester Class 220 copper magnet wire is commonly used in applications where high-temperature resistance and electrical insulation are required, such as in motors and transformers that generate significant heat during operation.

Shock capability shall be at least 20°C higher than the class temperature of the wire insulation type. 

The enameled copper wire can be used in professional maintenance of mobile phones, computers, laptops and other precision motherboard

240 class round polyimide enameled copper wire 
220 class round polyamide-imide enameled copper wire
Polyester Series Enamelled Copper Wire 
Class 220 Polyamide-Imide Flat Enamelled Copper Wire

If you have any more questions or need further clarification, feel free to ask!

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