Litz Wire Types and Construction

Round Litz

Litz construction Types 1 through 6 are all designed to be round and vary from a simple bunch of conductors (Type 1) to complex designs utilizing multiple cores and several manufacturing operations (Type 6).

The smaller constructions of Litz Types 1 and 2 are typically used in High Q circuitry, such as toroidal coils and transformers. The larger Type 2 and Type 3 Litz designs have greater current carrying capacities necessary for high frequency power supply, inverter and grounding applications. Type 4, 5 and 6 Litz constructions all utilize at least one inert core and are used primarily in tuning circuitry for high power radio transmitters.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Round Litz

Equivalent Gauge

Circular Mil Area

Number of Strands

Strand Gauge

Film Coating

Construction Type

Other Insulation

Nominal Outside Diameter

Nominal Lbs./MFT

Direct Current Resistance Ohms/MFT

Construction

Recommended operating frequency - 60 Hz to 1k Hz

24

476

3

28

S

1

-

0.027

1.49

22.5

3/28

22

794

5

1

-

0.035

2.48

13.5

5/28

20

1,112

7

1

-

0.042

3.47

9.62

7/28

18

1,588

10

1

-

0.050

5.02

6.74

10/28

16

2,700

17

1

SN

0.065

8.69

3.96

17/28

14

4,129

26

1

SN

0.080

13.3

2.59

26/28

12

6,670

42

1

SN

0.102

21.3

1.60

42/28

10

10,480

66

2

SN

0.140

34.5

1.05

3X22/28

8

16,674

105

2

SN

0.177

54.9

.657

3X35/28

6

26,202

165

2

SN

0.222

86.2

.418

5X3/28

4

42,240

266

2

DN

0.285

141.

.259

7X38/28

2

66,696

420

2

DN

0.431

228.

.168

5X3X28/28

1/0

105,602

665

2

SNB

0.537

366.

.106

7X5X19/28

2/0

133,392

840

5

SNB

0.657

480.

.084

6(5X28/28)

3/0

171,504

1,080

5

SNB

0.787

634.

.065

9(5X24/28)

4/0

217,238

1,368

5

SNB

0.941

828.

.051

12(3X38/28)

Recommended operating frequency - 1K Hz to 10k Hz

26

300

3

30

S

1

-

0.022

.95

35.8

3/30

24

500

5

1

-

0.028

1.58

21.5

5/30

22

700

7

1

-

0.033

2.22

15.4

7/30

20

1,100

11

1

-

0.045

3.58

9.76

11/30

18

1,700

17

1

SN

0.055

5.50

6.32

17/30

16

2,600

26

1

SN

0.064

8.38

4.13

26/30

14

4,200

42

1

SN

0.082

13.5

2.56

42/30

12

6,500

65

2

SN

0.112

21.4

1.69

5X13/30

10

11,000

110

2

SN

0.145

36.3

1.00

5X22/30

8

16,800

168

H

2

-

0.191

54.6

.655

7X24/30

7

25,900

259

2

-

0.237

84.1

.425

7X37/30

6

26,600

266

2

-

0.240

86.4

.413

7X38/30

4

41,300

413

2

-

0.300

134.

.266

7X59/30

3

52,500

525

2

-

0.338

171.

.209

7X75/30

2

66,500

665

2

-

0.380

216.

.165

7X95/30

2

80,500

805

2

DN

0.421

267.

.136

7X115/30

1/0

125,000

1,250

S

2

SNB

0.631

435.

.090

5X5X50/30

2/0

135,000

1,350

5

SNB

0.667

486.

.083

6(5X45/30)

3/0

195,000

1,950

5

SNB

0.794

697.

.057

6(5X5X13/30)

4/0

252,000

2,520

5

SNB

0.981

916.

.045

6(5X3X28/30)

 

 

 

 

 

 

 

Round Litz

Equivalent Gauge

Circular Mil Area

Number of Strands

Strand Gauge

Film Coating

Construction Type

Other Insulation

Nominal Outside Diameter

Nominal Lbs./MFT

Direct Current Resistance Ohms/MFT

Construction

Recommended operating frequency - 10k Hz to 20k Hz

26

303

6

33

S

1

SN

.025

1.01

35.8

6/33

24

403

8

1

-

.025

1.27

26.9

8/33

22

655

13

1

SN

.035

2.15

16.6

13/33

20

1,059

21

1

SN

.044

3.44

10.3

21/33

18

1,613

32

1

SN

.054

5.22

6.71

32/33

16

2,672

53

1

SN

.066

8.60

4.05

53/33

14

5,041

100

2

SN

.099

16.6

2.20

5X20/33

12

7,562

150

2

SN

.121

24.9

1.47

5X30/33

10

10,586

210

2

SN

.144

34.8

1.05

3X70/33

8

16,585

329

2

DN

.183

55.4

.669

7X47/33

6

26,465

525

2

DN

.230

90.4

.430

5X3X35/33

4

42,849

850

2

DN

.292

146.

.265

5X5X34/33

2

66,541

1,320

5

SNB

.484

244.

.171

6(5X44/33)

1

90,738

1,800

5

SNB

.558

334.

.127

6(3/5/20/33)

1/0

105,861

2,100

5

SNB

.600

383.

.107

6(5/70/33)

2/0

136,107

2,700

5

SNB

.675

496.

.084

6(5X3/30/33)

3/0

169,377

3,360

5

SNB

.850

651.

.067

12(5X56/33)

4/0

211,772

4,200

5

SNB

.987

841.

.054

14(5X3/20/33)

-

299,435

5,940

6

PVC

1.29

1255.

.038

6(6(5/33/33))

-

512,972

10,176

6

PVC

1.80

2283.

.022

8(6(4X53/33))

-

725,904

14,400

6

PVC

2.42

3550.

.016

15(6(5X32/33))

-

917,462

18,200

6

PVC

3.12

5088.

.012

20(13(70/33))

-

1,572,792

31,200

6

PVC

3.99

8684.

.007

20(6(5/52/33))

Recommended operating frequency - 20k Hz to 50k Hz

30

100

4

36

S

1

-

.013

.319

109.6

4/36

28

175

7

1

-

.017

.559

62.7

7/36

26

250

10

1

SN

.024

.846

43.9

10/36

24

400

16

1

SN

.029

1.34

27.4

16/36

22

675

27

1

SN

.037

2.24

16.3

27/36

20

1,025

41

1

SN

.045

3.37

10.7

41/36

18

1,625

65

2

SN

.061

5.46

6.91

5X13/36

16

2,625

105

2

SN

.073

8.78

4.26

3X35/36

14

4,125

165

2

SN

.091

13.8

2.72

5X33/36

12

6,625

265

2

SN

.116

22.1

1.70

5X53/36

10

10,500

420

2

DN

.149

36.4

1.10

5X3X28/36

8

16,500

660

2

DN

.186

57.2

.697

5X3X44/36

6

26,250

1,050

2

DN

.234

90.7

.438

5X5X42/36

4

45,000

1,800

2

DN

.305

155.

.255

5X5X72/36

2

66,500

2,660

2

DN

.370

228.

.173

7X5X76/36

1

84,000

3,360

5

SNB

.548

318.

.140

6(5X4X28/36)

1/0

108,000

4,320

5

SNB

.655

420.

.109

9(5X3X32/36)

2/0

135,000

5,400

5

SNB

.728

522.

.087

9(5X3X40/36)

3/0

171,000

6,840

5

SNB

.870

682.

.069

12(5x3x38/36)

4/0

211,500

8,460

5

SNB

.962

840.

.055

12(5x3x47/36)

 

 

 

Round Litz

Equivalent Gauge

Circular Mil Area

Number of Strands

Strand Gauge

Film Coating

Construction Type

Other Insulation

Nominal Outside Diameter

Nominal Lbs./MFT

Direct Current Resistance Ohms/MFT

Construction

Recommended operating frequency - 50k Hz to 100k Hz

30

112

7

38

S

1

SN

.017

.382

98.9

7/38

28

160

10

1

SN

.020

.538

69.3

10/38

26

256

16

1

SN

.024

.849

43.3

16/38

24

400

25

1

SN

.029

1.31

27.7

25/38

22

640

40

1

SN

.036

2.08

17.4

40/38

20

1,056

66

1

SN

.050

3.50

10.8

3/22/38

18

1,600

100

2

SN

.061

5.27

7.10

5X20/38

16

2,592

162

2

SN

.073

8.50

4.38

3/54/38

14

4,160

260

2

SN

.093

13.6

2.73

5X52/38

12

6,720

420

2

SN

.118

22.5

1.73

5X3/28/38

10

10,560

660

2

DN

.150

35.9

1.11

5X3/44/38

8

16,800

1,050

2

DN

.189

57.0

.692

5X5X42/38

6

26,400

1,650

2

DN

.236

89.4

.440

5X5X66/38

4

42,000

2,625

2

DN

.296

146.

.283

5X5X3/35/38

2

66,240

4,140

5

SNB

.494

247.

.180

6(5X3/46/38)

1

84,000

5,250

5

SNB

.551

311.

.141

6(5X5X35/38)

1/0

105,600

6,600

5

SNB

.613

389.

.112

6(5X5X44/38)

2/0

136,000

8,500

5

SNB

.749

522.

.087

10(5X5X34/38)

3/0

168,000

10,500

5

SNB

.828

642.

.070

10(5X5X42/38)

4/0

211,200

13,200

5

SNB

.966

824.

.056

12(5X5X44/38)

Recommended operating frequency - 100k Hz to 200k Hz

34

38.4

4

40

S

1

-

.008

.127

292.4

4/40

32

67.3

7

1

-

.011

.222

167.1

7/40

30

106.

11

1

SN

.017

.380

106.3

11/40

28

163.

17

1

SN

.020

.578

68.8

17/40

26

260.

27

1

SN

.024

.905

43.3

27/40

24

404.

42

1

SN

.030

1.40

27.9

42/40

22

634.

66

2

SN

.040

2.23

18.2

3X22/40

20

1,036.

108

2

SN

.050

3.62

11.1

3/36/40

18

1,634.

170

2

SN

.061

5.67

7.05

5/34/40

16

2,595.

270

2

SN

.073

9.18

4.55

3/3/30/40

14

4,180.

435

2

SN

.093

14.8

2.83

5X3/29/40

12

6,727.

700

2

SN

.118

23.7

1.76

5X5X28/40

10

10,571.

1,100

2

SN

.148

37.3

1.12

5X5X44/40

8

17,298.

1,800

5

DN

.236

66.6

.700

6(5X3/20/40)

6

26,812.

2,790

5

DN

.293

103.

.451

6(5X3/31/40)

4

42,813.

4,455

5

SNB

.431

176.

.282

9(5X3/33/40)

2

69,192.

7,200

5

SNB

.572

290.

.174

12(5X3/40/40)

1/0

105,710.

11,000

5

SNB

.668

428.

.114

10(5X5X44/40)

 

 

 

 

 

 

 

Round Litz

Equivalent Gauge

Circular Mil Area

Number of Strands

Strand Gauge

Film Coating

Construction Type

Other Insulation

Nominal Outside Diameter

Nominal Lbs./MFT

Direct Current Resistance Ohms/MFT

Construction

Recommended operating frequency - 200k Hz to 350k Hz

36

25.0

4

42

S

1

-

.007

.079

457.0

4/42

34

43.8

7

1

SN

.012

.157

261.2

7/42

32

62.5

10

1

SN

.014

.220

182.8

10/42

30

100.

16

1

SN

.016

.345

114.3

16/42

28

163.

26

1

SN

.020

.551

70.3

26/42

26

250.

40

1

SN

.024

.836

45.7

40/42

24

413.

66

2

SN

.031

1.40

28.4

3/22/42

22

656.

105

2

SN

.040

2.21

17.8

5/21/42

20

1,031.

165

2

SN

.049

3.45

11.4

5/33/42

18

1,688.

270

2

SN

.062

5.74

7.11

5X3/18/42

16

2,625.

420

2

SN

.073

8.88

4.57

5X3/28/42

14

4,125.

660

2

SN

.092

13.9

2.91

5X3/44/42

12

6,563.

1,050

2

DN

.119

22.4

1.83

5X5X42/42

10

10,687.

1,710

5

DN

.185

40.3

1.15

6(5X3/19/42)

8

16,875.

2,700

5

DN

.231

63.0

.729

6(5X3/30/42)

6

26,250.

4,200

5

DN

.287

97.1

.468

6(5X5/28/42)

4

42,188.

6,750

5

SNB

.434

169.

.291

10(5X3/45/42)

2

67,500.

10,800

5

SNB

.561

272.

.182

12(5X5/36/42)

Recommended operating frequency - 350k Hz to 850k Hz

38

16

4

44

S

1

-

.005

.050

729.1

4/44

36

28

7

1

SN

.010

.102

416.6

7/44

34

40

10

1

SN

.011

.143

291.7

10/44

32

64

16

1

SN

.014

.223

182.3

16/44

30

100

25

1

SN

.016

.341

116.7

25/44

28

160

40

1

SN

.019

.537

72.9

40/44

26

264

66

2

SN

.026

.898

45.3

3/22/44

24

420

105

2

SN

.032

1.41

28.5

3/35/44

22

640

160

2

SN

.039

2.13

18.7

5/32/44

20

1,020

255

2

SN

.048

3.37

11.7

5/51/44

18

1,620

405

2

SN

.060

5.45

7.56

5X3/27/44

16

2,600

650

2

SN

.072

8.71

4.72

5X5/26/44

14

4,200

1,050

2

SN

.091

14.0

2.920

5X5X42/44

12

6,600

1,650

2

DN

.117

22.8

1.910

5X5X3/22/44

10

10,500

2,625

2

DN

.146

36.4

1.200

5X5X3/35/44

8

16,800

4,200

5

DN

.226

62.0

.747

6(5X5/28/44)

 

 

 

 

 

 

 

 

 

 

 

Round Litz

Equivalent Gauge

Circular Mil Area

Number of Strands

Strand Gauge

Film Coating

Construction Type

Other Insulation

Nominal Outside Diameter

Nominal Lbs./MFT

Direct Current Resistance Ohms/MFT

Construction

Recommended operating frequency - 850k Hz to 1.4M Hz

38

17.3

7

46

S

1

-

.006

.054

658.9

7/46

36

24.7

10

1

SN

.010

.092

461.2

10/46

34

39.5

16

1

SN

.011

.142

288.3

16/46

32

64.2

26

1

SN

.014

.225

177.4

26/46

30

101.

41

1

SN

.016

.348

112.5

41/46

28

163.

66

2

SN

.021

.567

71.6

3/22/46

26

259.

105

2

SN

.026

.889

45.1

3/35/46

24

408.

165

2

SN

.032

1.38

28.7

5/33/46

22

667.

270

2

SN

.039

2.29

18.0

3X3/30/46

20

1,038.

420

2

SN

.048

3.54

11.6

5X3/28/46

18

1,630.

660

2

SN

.060

5.53

7.34

5X3/44/46

16

2,593.

1,050

2

SN

.072

8.75

4.61

5X5/42/46

14

4,261.

1,725

2

DN

.095

14.9

2.88

5X5X3/23/46

12

6,669.

2,700

2

DN

.118

23.2

1.84

5X5X3/36/46

10

10,745.

4,350

5

DN

.191

40.5

1.14

6(5X5/29/46)

Recommended operating frequency - 1.4M Hz to 2.8M Hz

42

7.7

5

48

S

1

-

.004

.024

1478.9

5/48

40

10.8

7

1

SN

.008

.044

1056.3

7/48

38

18.5

12

1

SN

.009

.072

616.2

12/48

36

27.7

18

1

SN

.010

.104

410.8

18/48

34

40.0

26

1

SN

.012

.147

284.4

26/48

32

69.3

45

1

SN

.014

.247

164.3

45/48

30

102.

66

2

SN

.018

.367

114.8

3/22/48

28

162.

105

2

SN

.022

.573

72.2

5/21/48

26

277.

180

2

SN

.027

.966

42.1

5X36/48

24

462.

300

2

SN

.034

1.63

25.9

5/3/20/48

22

647.

420

2

SN

.040

2.26

18.5

5/3/28/48

20

1,040.

675

2

SN

.050

3.61

11.5

5X3/45/48

18

1,694.

1,100

2

SN

.062

5.85

7.06

5X5/44/48

16

2,657.

1,725

2

SN

.074

9.35

4.62

5X5/3/23/48

14

4,158.

2,700

2

SN

.093

14.6

2.95

5X5/3/36/48

12

6,930.

4,500

5

DN

.159

26.9

1.77

6(5X5/30/48)




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