Enameled Round Aluminum Wire

Enameled round aluminum wire is a type of magnet wire that consists of an aluminum conductor coated with a thin layer of enamel insulation.

Enameled Round Aluminum Wire structure

Enameled Round Aluminum Wire

Diameter of our transformer enameled round aluminum wire

Name Enameled Round Aluminum Wire
Conductor Aluminum
Dimension Diameter: 0.16-9.2mm
Thermal Class 120(Class E), 180(Class H), 200(Class C), 220(Class C+), 240(Class HC)
Insulation Thickness: G1; G2 or single build; heavy build
Standard IEC 60317-16,60317-16/28,MW36 60317-29 BS6811, MW18 60317-18 ,MW20 60317-47
Certificate UL
Packing 30kg-150kg ply-wood spool(250*400 / 250*500/ 250*600/ 250*730)

Insulation Building:Single & Heavy/double coated

The insulating materials are subdivided according to IEC standards into insulating classes showing the corresponding maximum working temperature that must not be exceeded at any point of the winding.
The table above outlines the recognized insulation classifications.

Class Temperature
°C °F
E 120 248
B 130 266
F 155 311
H 180 356
C 200 392
C+ 220 428


Excellent bending property
High flexibility of the enamel
Good resistance to abrasion
High mechanical property
Higher thermal property
Good resistance to refrigerant and freon
Suitable for windings that are subjected to constantly high temperature and mechanical stress
Good chemical resistance
Outstanding mechanical and chemical property

Standards and insulation materials of enameled round aluminum wire

Thermal Class Insulation types NEMA Standard(MW1000) IEC Standard Federal Specification


105℃ Plain Enamel NONE NONE NONE
Formvar MW 15 (RD) MW 18 (SQ & RECT) 60317-1(RD) 60317-17(SQ & RECT) JW 1177/ 14 (RD) JW1177/ 16 (SQ & RECT)
Formvar Bondable MW19 60317-5 JW 1177/6
130℃ Polyurethane Nylon Bondable – 130 NONE NONE NONE
155℃ Polyurethane – 155 MW79 60317-20 JW1177/ 41
Polyurethane Nylon – 155 MW80 60317-21 JW1177/42
Polyurethane Bondable – 155
Polyurethane Nylon Bondable – 155
MW 136
Dacron Glass – 155 MW 45 (RD) MW 46 (SQ & RECT) NONE(RD) 60317-60(SQ & RECT) JW 1177/ 20 (RD)

JW1177/ 25 (SQ & RECT)

180℃ Polyurethane – 180 MW82 60317-51 NONE
Polyurethane Nylon – 180 MW83 60317-55 NONE
Polyester-imide MW30 60317-8 JW 1177/ 12
Polyester-Nylon MW76 60317-22 JW 1177/38
Solderable Polyester MW77 60317-23 JW 1177/39
Solderable Polyester Nylon MW78 NONE JW 1177/ 40
Polyurethane Bondable – 180
Polyurethane Nylon Bondable – 180
Polyurethane Nylon Bondable – 180 MW137 NONE NONE
Polyester-imide Bondable
Polyester-amide-imide Bondable
Solderable Polyester Bondable
MW 102
Dacron Glass High Temp MW 51 (RD) MW 53 (SQ & RECT) NONE(RD) 60317-61(SQ & RECT) JW 1177/ 32 (RD)

JW1177/ 34 (SQ & RECT)

200℃ Polyester – 200 MW74 60317-42 JW 1177/43
Polyester A/I Topcoat MW 35 (RD) MW 36 (SQ & RECT) 60317-13(RD) 60317-29(SQ & RECT) JW 1177/ 14 (RD)

JW1177/ 13 (SQ & RECT)

Polyester A/I Polyamideimide MW73 60317-13 NONE
240℃ Polyimide – ML MW 16 (RD) MW 20 (SQ & RECT) 60317- 46(RD) 60317- 47(SQ & RECT) JW 1177115 (RD)

JW1177/ 18 (SQ & RECT)


Transformers: especially used for distribution system power transformers where cost and weight savings are important.
Electric Motors: employed in motor windings, especially in applications where the reduced weight of aluminum can enhance performance.
Inductors and Coils: uses in inductors and various types of coils for electronic circuits.
Generators: utilized in generator windings to convert mechanical energy into electrical energy.


Cost-Effective: Lower material cost compared to copper.
Lightweight: Easier to handle and install, reducing the overall weight of the finished product.
Good Thermal Performance: The enamel coating provides good heat resistance.

Installation and Handling

  1. Winding
    • Even and Tight Winding: Care must be taken to wind the wire evenly and tightly to avoid gaps and ensure consistent performance.
    • Tension Control: Maintain appropriate tension during winding to prevent breaking the wire.
  2. Connections
    • Stripping Insulation: Carefully strip the enamel coating from the ends where connections are made.
    • Special Connectors: Use connectors designed for aluminum to ensure reliable electrical and mechanical connections.
    • Anti-Oxidation Measures: Apply anti-oxidation compounds at connection points to prevent corrosion.
  3. Mechanical Handling
    • Avoid Kinks and Bends: Handle the wire carefully to avoid kinks and sharp bends that can damage the enamel coating and the wire itself.