Technical Standard Data of Litz Wire Products

Please click each of the Taps below.

Wire Gauge (BS AWG/SWG)

NEMA standard and Comparison with IEC 317

KS(Korean Standard) Class 0 Enameled Wires

KS(Korean Standard) Class 1 Enameled Wires

KS(Korean Standard) Class 2 Enameled Wires

Class 0 (Zero) SBH - EIW

BS(British Standard)

UL Listed Wires

AWG 01~20_Ampacity, Equivalents, Fusing Current

AWG 21~40_Ampacity, Equivalents, Fusing Current

AWG 1~20_Diameter, Turns of wire, Area, Copper resistance

AWG 21~40_Diameter, Turns of wire, Area, Copper resistance

Demanded AWG size as Frequency Range

Data of resistance and milliampere as AWG

The below wire gauge table compares BS AWG with SWG over appearing diameter(mm). For your reference, SWG means Standard Wire Gauge, AWG means American Wire Gauge and BS means British Standard.

Regarding the NEMA standard table, this table shows the conductor size as AWG would be insulated by single build or heavy build. Even if you may not find triple build on the table, it is actually more than heavy build. According to UL standard, Single Build = Class 2, Heavy Build = Class 1, Triple Build = Class 0. FYR, NEMA standard means National Electrical Manufacturers Association.

 

Data Table – Specification Comparison IEC 317 vs. NEMA MW 1000-1997

IEC No. Status Insulation Type Round Conductor Rectangular Conductor Thermal Class NEMA Equivalent
317-1 Pub. Polyvinyl Acetal X 105 MW 15-C
317-2 Pub. Solderable Polyurethane + Bonding layer X 130 MW 3-C
317-3 Pub. Polyester X 155 MW 5-C
317-4 Pub. Solderable Polyurethane X 220 MW 75-C
317-7 Pub. Polyimide X 180 MW 16-C
317-8 Pub. Polyester-imide X 130 MW 30-C
317-11 Pub. Bunched solderable polyurethane with silk covering X 120 N/A
317-12 Pub. Polyvinyl Acetal X 200 N/A
317-13 Pub. Polyester or polyesterimide + polyamideimide X 105 MW 35-C
317-14 Pub. Polyvinyl Acetal (aluminum) X 180 MW 15-A
317-15 Pub. Polyesterimide (aluminum) X 155 MW 74-A(220)
317-16 Pub. Polyester X 105 N/A
317-17 Pub. Polyvinyl Acetal X 120 MW 18-C
317-18 Pub. Polyvinyl Acetal X 130 N/A
317-19 Pub. Solderable Polyurethane + Polyamide X 130 MW 28-C
317-20 Pub. Solderable Polyurethane X 155 MW 79-C
317-21 Pub. Solderable Polyurethane + Polyamide X 155 MW 80-C
317-22 Pub. Polyester(imide)+Polyamide X 180 MW 76-C
317-23 Pub. Solderable Polyesterimide X 180 MW 77-C
317-24 Pub. Polyester(imide) + Polyamide(Aluminum) X 180 MW 76-A(200)
317-25 Pub. Polyester(imide) + Polyamideimide(Aluminum) X 200 MW 35-A(220)
317-26 Pub. Polyimideimide X 200 MW 81-C
317-27 FDIS Paper Cover X MW 33-C
317-28 Pub. Polyesterimide X 180 N/A
317-29 Pub. Polyester(imide) + Polyamideimide X 200 MW 36-C
317-31 Pub. Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Wound X 180 MW 53-C
317-32 Pub. Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Wound X 155 MW 42-C
317-33 Pub. Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Wound X 200 MW 43-C
317-34 Pub. Polyester X 130L MW 5-C(155)
317-35 Pub. Solderable Polyurethane + Bonding layer X 155 Proposed
317-36 Pub. Solderable Polyester(imide) + Bonding layer X 180 Proposed
317-37 Pub. Polyester(imide) + Bonding layer X 180 Proposed
317-38 Pub. Polyester(imide) +Polyamideimide + Bonding Layer X 200 MW 102-C
317-39 Pub. Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Braided X 180 N/A
317-40 Pub. Bare or Enameled Polyester(imide) Varnish Trested, Glass Fiber Braided X 200 N/A
317-41 Pub. Solderable polyester X 130L MW 26-C(155)
317-42 Pub. Polyesteramide-imide X 200 MW 74-C
317-43 Pub. Aromatic Polyimide Tape(covered) X 240 MW 63-C(220)
317-44 Pub. Aromatic Polyimide Tape(covered) X 240 MW 62-C(220)
317-45 FDIS Polyester X 130 MW 5-C(155)
317-46 Pub. Aromatic Polyimide X 240 MW 16-C
317-47 Pub. Aromatic Polyimide X 240 MW 20-C
317-48 CDV Bare or Enameled + Glass Fiber Wound, impregnated X 155 MW 41-C
317-49 CDV Bare or Enameled + Glass Fiber Wound, impregnated X 180 MW 30-C
317-50 CDV Bare or Enameled + Glass Fiber Wound, impregnated X 200 MW 44-C
317-51 CD Polyurethane X 180 Proposed
317-52 CDV Aromatic Polyimide (aramid) Tape Wrapped X 330 MW 61-C
317-53 CDV Aromatic Polyimide (aramid) Tape Wrapped X 220 MW 60-C

 

 

NEMA standard

The following table explains KS Class 0 (Korean Standard). In case of 3.20mm, conductor’s tolerance is ±0.04mm, min. thickness of insulation film(enamel coating) is 0.049, max. overall diameter would be 3.388mm, max. conductor resistance is tested at 20℃ and unit of measure is Ω/km. FYR, class 0 = triple build.

The below table explains KS Class 1 (Korean Standard). In case of 3.20mm, conductor’s tolerance is ±0.04mm, min. thickness of insulation film(enamel coating) is 0.034, max. overall diameter would be 3.388mm, max. conductor resistance is tested at 20℃ and unit of measure is Ω/km. FYR, class 1 = heavy build.

The table shows KS Class 2 (Korean Standard). In case of 1.00mm, tolerance of diameter is ±0.012mm, min. minimum thickness of insulation film(enamel coating) is 0.017mm, maximum overall diameter would be 1.062mm, maximum conductor resistance is tested at 20℃ and unit of measure is Ω/km. FYR, class 2 = single build.

Regarding the table, Class 0 (Zero) SBH – EIW, it shows minimum insulation thickness of enamel film and maximum self bonding varnish thickness of film on TP(Top Coating). In case of 0.20mm, the overall diameter would be 0.254(±0.003mm). FYR, SBH-EIW’ features are bondable by heating without impregnating and excellent thermal stability. Its applications are deflection yoke coils and Magnet coils (clutch coil, vacuum cleaner motor, etc). Also, it means polyesterimide overcoated with self-bonding enameled wire, thermal index H(180℃), UL file number = E84441, product range : 0.12 ∼0.90 mm.

The below British Standard table explains conductor diameter range from normal, maximum and minimum. Even if there are same Grade 1(enamel coating thickness), the OD(outer diameter) could be little different because Grade 1 would be fabricated by working environment or enamel insulating repeating number. For example, some enamel insulating repeating number of Grade 1 should be 3 ~ 5 times.

Mtl Dsg BC Coat Overcoat ANSI type Temp.
AEW-R Modified Polyester Polyamideimide MW 73C 200
AI-EIW Modified Polyester Polyamideimide MW 35C 200
UEW-F Polyurethane MW 79C 155
NPW Polyester-Nylon Nylon MW 24C 155
NUW Polyurethane-Nylon Nylon MW 28C 130
YHW-B Polyurethane MW 75C 130
UEW-B Polyurethane MW 75C 130
AIW Polyamide-imide MW 81C 200
EIW Polyester-imide MW 5 155

***(Now under UL Application) / MW 80C / 155

The below table shows (i) NEC(National Electrical Code) copper wire ampacity with 60/70/90℃ insulation, (ii) Approx. stranded metric equivalents and (iii) copper’ fusing current(preece, onderdonk) as AWG size from 1 to 20.

The below table shows (i) NEC(National Electrical Code) copper wire ampacity with 60/70/90℃ insulation, (ii) Approx. stranded metric equivalents and (iii) copper’ fusing current(preece, onderdonk) as AWG size from 21 to 40.

The copper resistance and the area are tested by Ω per km, mΩ per meter, Ω per kFT and mΩ per ft as per AWG size from 1 to 20 on the table. Also, the turns of wire are checked by per inch and cm as before.

The copper resistance and the area are tested by Ω per km, mΩ per meter, Ω per kFT and mΩ per ft as per AWG size from 21 to 40 on the table. Also, the turns of wire are checked by per inch and cm as before.

You can see which AWG size of copper wire suitable is for your high frequency transformer or inductor(induction) via the below data. The strands and thickness of litz wire should be designed or constructed as per the frequency range, ampere, current and voltage etc. We, YDK, can provide you the solution of litz design to suit your working environment.

As per AWG guage from awg46(0.04mm) to awg16(1.30mm), ohm(resistance) and mA(milliampere) are changed as below. For example, awg46 has the properties as 0.04 mm diameter, 0.0013 ㎟, 13,700 ohm/km and 3.8 mA in condition of I at 3A/㎟.