Nanocrystalline Current Transformer Cores

Nanocrystalline Current Transformer Cores - Precision & Stability in Measurement

Explore TI-Electronic’s high-accuracy nanocrystalline CT cores

Nanocrystalline cores are the preferred choice for precision current measurement applications due to their exceptional magnetic properties, high stability, and cost-effectiveness. These cores meet the stringent demands of measurement-grade current transformers used in power monitoring, smart metering, and automation systems.

Unlike traditional materials such as silicon steel or even costly permalloy, nanocrystalline alloys offer both high saturation flux density and ultra-high permeability — a combination that enables accurate performance even in compact core geometries.

🌌 Why Nanocrystalline for CTs?

  • Superior permeability (~80,000 initial µi) enables low excitation current and accurate signal transfer.

  • Saturation flux density of 1.25 T protects instruments from secondary overcurrent damage.

  • Stable operation in a wide range from -40°C to +130°C.

  • Improved linearity and low phase/rate error for exact current transformation.

  • Significant cost savings compared to permalloy, without compromising performance.

📊 Common Applications

  • Measurement-grade CTs for power distribution systems

  • High-accuracy CTs in energy meters (Class 0.1/0.2/0.5S)

  • Compact CT modules for smart grid and industrial equipment

  • Integration in combined-type transformers for space-constrained environments

🏢 Industrial & Custom Capabilities

At TI-Electronic, we provide a wide portfolio of CT cores in standard sizes, with:

  • Plastic cases or epoxy-coated versions

  • Fast delivery from European warehouse

  • ISO 9001:2015 certified production

  • Technical consultation and core design optimization

We also manufacture large-format or high-aspect-ratio versions for utility, EV, or rail applications.

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Nanocrystalline Cores for Current Transformer - Product Range Specification Table

Turn your MOBILE horizontally to see the full table

Part Nr.

Core dimension (mm)

Case dimension (mm)

Eff.
cross
area
(cm2)

Mean
path
length
(cm)

Exciting
current
(mA)

Excitation
voltage
(mV)

od

id

h

OD

ID

H

Ae

Lm

N1=1

N2=1

TIE-NANO-CT-139.505

13

9.5

5

14.5

8.33

6.1

0.068

3.53

10

0.1

TIE-NANO-CT-13.29.610

13.2

9.6

10

15.1

8.5

12.0

0.14

3.58

10

0.2

TIE-NANO-CT-151005

15

10

5

16.6

6.64

8.2

0.098

3.92

10

0.15

TIE-NANO-CT-161010

16

10

10

18.5

12.05

10.6

0.23

4.08

10

0.3

TIE-NANO-CT-17116.5

17

11

6.5

19.55

9.5

7.5

0.15

4.4

10

0.2

TIE-NANO-CT-17.8135

17.8

13

5

19.6

11.6

6.44

0.09

4.83

10

0.1

TIE-NANO-CT-191405

19

14

5

21.3

12.5

7.05

0.098

5.18

10

0.08

TIE-NANO-CT-19146.5

19

14

6.5

21.25

12.7

8.5

0.127

5.18

10

0.1

TIE-NANO-CT-191408

19

14

8

22.6

12.3

10.1

0.156

5.18

10

0.12

TIE-NANO-CT-191410

19

14

10

22.6

12.3

12.8

0.195

5.18

10

0.15

TIE-NANO-CT-201208

20

12

8

22.0

10.2

10.55

0.25

5.02

10

0.2

TIE-NANO-CT-201210

20

12

10

22.8

10.1

12.3

0.31

5.02

10

0.25

TIE-NANO-CT-201405

20

14

5

22.55

12.6

6.55

0.12

5.34

10

0.1

TIE-NANO-CT-201410

20

14

10

22.55

12.6

12.46

0.24

5.34

10

0.2

TIE-NANO-CT-211510

21

15

10

23.6

13.1

12.45

0.23

5.65

10

0.2

TIE-NANO-CT-211610

21

16

10

23.6

13.65

11.98

0.195

5.8

10

0.15

TIE-NANO-CT-241810

24

18

10

27.0

16.1

12.5

0.234

6.59

10

0.15

TIE-NANO-CT-251710

25

17

10

27.95

15.5

12.4

0.312

6.59

10

0.15

TIE-NANO-CT-25206.5

25

20

6.5

27.55

18.35

9.25

0.126

7.06

10

0.1

TIE-NANO-CT-252010

25

20

10

27.65

18.2

12.75

0.195

7.06

10

0.1

TIE-NANO-CT-251910

25

19

10

27.75

16.2

12.7

0.234

6.91

10

0.15

TIE-NANO-CT-281810

28

18

10

29.8

17.3

12.2

0.39

7.22

10

0.2

TIE-NANO-CT-281815

28

18

15

29.8

17.3

17.9

0.585

7.22

10

0.3

TIE-NANO-CT-302008

30

20

8

32.8

18.2

10.0

0.312

7.85

10

0.15

TIE-NANO-CT-302010

30

20

10

33.1

18.2

13.2

0.39

7.85

10

0.2

TIE-NANO-CT-302015

30

20

15

33.67

18.0

17.76

0.585

7.85

15

0.5

TIE-NANO-CT-322015

32

20

15

35.0

18.0

18.3

0.702

8.16

15

0.6

TIE-NANO-CT-382710

38

27

10

40.3

25.0

12.8

0.429

10.2

15

0.25

TIE-NANO-CT-443610

44

36

10

46.6

33.6

13.2

0.312

12.56

15

0.15

TIE-NANO-CT-453015

45

30

15

48.3

26.4

18.2

0.88

11.8

15

0.5

TIE-NANO-CT-494310

49

43

10

51.9

42.1

13.4

0.234

14.4

20

0.12

TIE-NANO-CT-504010

50

40

10

53.2

36.9

13.6

0.39

14.13

20

0.25

TIE-NANO-CT-605010

60

50

10

63.8

46.5

14.1

0.39

17.27

20

0.2

TIE-NANO-CT-696110

69

61

10

72.4

57.6

14.1

0.312

20.41

30

0.2

TIE-NANO-CT-867710

86

77

10

89.8

73.2

14.1

0.35

25.6

30

0.15

TIE-NANO-CT-908210

90

82

10

94.5

77.4

14.1

0.312

27.0

30

0.1

TIE-NANO-CT-11010010

110

100

10

115.0

95.2

14.5

0.39

32.97

30

0.1

TIE-NANO-CT-12811315

128

113

15

132.6

109.5

19.5

0.88

37.8

30

0.25

TIE-NANO-CT-13012015

130

120

15

135.4

117.0

17.5

0.585

39.25

30

0.18

TIE-NANO-CT-14312815

143

128

15

147.5

124.2

19.3

0.87

42.55

30

0.15

TIE-NANO-CT-18716715

187

167

15

191.5

162.5

19.38

1.17

55.57

30

0.1

The AL value tolerance of the products is regulated in the quality agreement concluded with the customer.

Nanocrystalline Cores for General-Purpose Current Transformers

Reliable performance for industrial, power, and utility sensing applications

These nanocrystalline cores are optimized for general-purpose current transformers, where cost-efficiency, stability, and current-handling capability are more critical than strict metering accuracy.

They are ideal for use in industrial equipment, UPS systems, EV chargers, solar inverters, and other power electronics where monitoring and protection are key requirements. With large core sizes, they support higher currents, offer excellent thermal stability, and are easy to integrate into custom CT assemblies.

  • Suitable for non-billing CTs, relay protection, and load monitoring

  • Operate reliably in –40°C to +130°C environments

  • Mechanically robust, with low excitation current

  • Available in standard and customizable sizes

📌 Best choice when precision metering isn’t required, but reliable current sensing is essential.

Nanocrystalline Cores for General-Purpose Current Transformers - Product Range Specification Table

Turn your MOBILE horizontally to see the full table

Part Nr.

Core dimension (mm)

Case dimension (mm)

Eff.
cross
area
(cm2)

Mean
path
length
(cm)

Exciting
current
(mA)

Excitation
voltage
(mV)

od

id

h

OD

ID

H

Ae

Lm

N1=1

N2=1

TIE-NANO-CT-805030

80

50

30

85

45

35

  

10

0.1

  

TIE-NANO-CT-906030

90

60

30

95

55

35

  

10

0.2

  

TIE-NANO-CT-1005030

100

50

30

105

45

35

  

10

0.15

  

TIE-NANO-CT-1109025

110

90

25

115

85

30

  

10

0.3

  

TIE-NANO-CT-1158530

115

85

30

120

80

35

  

10

0.2

  

TIE-NANO-CT-1208030

120

80

30

125

75

35

  

10

0.1

  

TIE-NANO-CT-1258520

125

85

20

130

80

25

  

10

0.08

  

TIE-NANO-CT-1259025

125

90

25

130

85

30

  

10

0.1

  

TIE-NANO-CT-1309030

130

90

30

135

85

35

  

10

0.12

  

TIE-NANO-CT-13010025

130

100

25

135

95

30

  

10

0.15

  

TIE-NANO-CT-16013025

160

130

25

165

125

30

  

10

0.2

  

TIE-NANO-CT-16013050

160

130

50

165

125

60

  

10

0.25

  

TIE-NANO-CT-18014030

180

140

30

185

135

35

  

10

0.1

  

TIE-NANO-CT-20015530

200

155

30

205

150

35

  

10

0.2

  

TIE-NANO-CT-25017040

250

170

40

256

164

46

  

10

0.2

  

TIE-NANO-CT-27521515

275

215

15

280

210

20

  

10

0.15

  

TIE-NANO-CT-33022020

330

220

20

336

214

21

  

10

0.15

  

TIE-NANO-CT-49030515

490

305

15

496

299

21

  

15

0.5

  

TIE-NANO-CT-52041515

520

415

15

526

409

21

  

15

0.6

  

TIE-NANO-CT-1165110515

1165

1105

15

1175

1095

25

  

15

0.25