Table 2. Electrical characteristics - parameter values (Tamb = 25 °C, unless otherwise specified)

Type

IRM max at VRM

VBR at IR (1)

10 / 1000 µs

8 / 20µs

αT

VCL(2)(3) IPP(4)

RD

VCL(2)(3) IPP(4)

RD

25 °C 85°C

Min. Typ. Max.

Max.

Max.

Max.

Max.

Max.

µA

µA

V

V

V

V

mA

V

A

Ω

V

A

Ω

10-4/°C

SM4T6V7AY/CAY

20

50

5

6.4

6.74

7.1

10

9.2

43.5

0.049

13.4

174

0.036

5.7

SM4T7V6AY/CAY

20

50

6.5

7.2

7.58

8

10

11.2

35.7

0.091

14.5

160

0.041

6.1

SM4T10AY/CAY

20

50

8.5

9.4

9.9

10.4

1

14.4

27.7

0.145

19.5

124

0.073

7.3

SM4T12AY/CAY

0.2

1

10

11.1 11.7

12.3

1

17

23.5

0.201

21.7

106

0.089

7.8

SM4T14AY/CAY

0.2

1

12 13.3

14

14.7

1

19.9

20.1

0.259

25.3

91

0.116

8.3

SM4T15AY/CAY

0.2

1

13 14.4 15.2

16

1

21.5

18.6

0.298

27.2

85

0.132

8.4

SM4T18AY/CAY

0.2

1

15 16.7 17.6

18.5

1

24.4

16.4

0.361

32.5

71

0.197

8.8

SM4T21AY/CAY

0.2

1

18 20.0 21.1

22.2

1

29.2

13.7

0.514

39.3

59

0.291

9.2

SM4T23AY/CAY

0.2

1

20 22.2 23.4

24.6

1

32.4

12.3

0.637

42.8

54

0.338

9.4

SM4T26AY/CAY

0.2

1

22 24.4 25.7

27

1

35.5

11.2

0.760

48.3

48

0.444

9.6

SM4T28AY/CAY

0.2

1

24 26.7 28.1

29.5

1

38.9

10.3

0.912

50

46

0.446

9.6

SM4T30AY/CAY

0.2

1

26 28.9 30.4

31.9

1

42.1

9.5

1.07

53.5

43

0.502

9.7

SM4T33AY/CAY

0.2

1

28 31.1 32.7

34.3

1

45.4

8.8

1.26

59

39

0.632

9.8

SM4T35AY/CAY

0.2

1

30 33.3 35.1

36.9

1

48.4

8.3

1.39

64.3

36

0.762

9.9

SM4T39AY/CAY

0.2

1

33 36.7 38.6

40.5

1

53.3

7.5

1.70

69.7

33

0.884

10

SM4T47AY/CAY

0.2

1

40 44.4 46.7

49

1

64.5

6.2

2.49

84

27

1.30

10.1

SM4T50AY/CAY

0.2

1

43 47.8 50.3

52.8

1

69.4

5.7

2.91

91

25

1.53

10.2

SM4T56AY/CAY

0.2

1

48 53.3 56.1

58.9

1

77.4

5.2

3.56

100

23

1.79

10.3

SM4T68AY/CAY

0.2

1

58 64.4 67.8

71.2

1

93.6

4.3

5.21

121

19

2.62

10.4

SM4T82AY/CAY

0.2

1

70 77.8 81.9

86

1

113

3.5

7.72

146

16

3.75

10.5

1. To calculate VBR versus Tj : VBR at Tj = VBR at 25 °C x (1 + αT x (Tj - 25))

2. To calculate VCL versus Tj : VCL at Tj = VCL at 25 °C x (1 + αT x (Tj - 25))

3. To calculate VCL max versus IPPappli: VCLmax = VCL - RD x (IPP - IPPappli) where IPP appli is the surge current in the

application

4. Surge capability given for both directions for unidirectional and bidirectional devices

SM4TxxAY, SM4TxxCAY

Characteristics

DS6927 - Rev 5

page 3/14