1N960BTR Datasheet 1N964B, 1N971B, 1N957B | P1-P3

1N957B - 1N979B Rev. F1

1N957B - 1N979B Zener Diodes

June 2007

1N957B - 1N979B

Zener Diodes

Absolute Maximum Ratings * T

A

= 25°C unless otherwise noted

* These ratings are limiting values above which the serviceability of the diode may be impaired.

Electrical Characteristics T

A

=25°C unless otherwise noted

Symbol Parameter Value Units

P

D

Power Dissipation

@ TL ≤ 75°C, Lead Length = 3/8”

500 mW

Derate above 75°C 4.0 mW/°C

T

J

, T

STG

Operating and Storage Temperature Range -65 to +200 °C

Device

V

Z

(Volts) (Note 1) Z

Z

(Ω) (Note 2) I

R

@ V

R

I

ZM

(mA)

(Note 3)

Min. Typ. Max.

@ I

Z

(mA)

Z

@ I

Z

ZK

@ I

ZK

μA Volts

Ω mA

1N957B

1N958B

1N959B

1N960B

1N961B

6.46

7.125

7.79

8.645

9.5

6.8

7.5

8.2

9.1

10

7.14

7.875

8.61

9.555

10.5

18.5

16.5

15

14

12.5

4.5

5.5

6.5

7.5

8.5

700

1.0

0.5

0.25

150

75

50

25

10

5.2

5.7

6.2

6.9

7.6

47

42

38

35

32

1N962B

1N963B

1N964B

1N965B

1N966B

10.45

11.4

12.35

14.25

15.2

11

12

13

15

16

11.55

12.6

13.65

15.75

16.8

11.5

10.5

9.5

8.5

7.8

9.5

11.5

13

16

17

700

0.25

5

8.4

9.1

9.9

11.4

12.2

28

26

24

21

19

1N967B

1N968B

1N969B

1N970B

1N971B

17.1

19

20.9

22.8

25.652

18

20

22

24

27

18.9

21

23.1

25.2

28.35

7.0

6.2

5.6

5.2

4.6

21

25

29

33

41

750

0.25

5

13.7

15.2

16.7

18.2

20.6

17

15

14

13

11

1N972B

1N973B

1N974B

1N975B

1N976B

8.5

31.35

34.2

37.05

40.85

30

33

36

39

43

31.5

34.65

37.8

40.95

45.15

4.2

3.8

3.4

3.2

3.0

49

58

70

80

93

1000

1500

0.25

5

22.8

25.1

27.4

29.7

32.7

10

9.2

8.5

7.8

7.0

1N977B

1N978B

1N979B

44.65

48.45

53.2

47

51

56

49.35

53.55

58.8

2.7

2.5

2.2

105

125

150

1500

2000

0.25

5

35.8

38.8

42.6

6.4

5.9

5.4

DO-35 Glass case

COLOR BAND DENOTES CATHODE

Tolerance = 5%

2 www.fairchildsemi.com

1N957B - 1N979B Rev. F1

1N957B - 1N979B Zener Diodes

Notes:

1. Zener Voltage (V

Z

) Measurement

Nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (T

L

) at 30°C ± 1°C and 3/8” lead length.

2. Zener Impedance (Z

Z

) Derivation

Z

ZT

and Z

ZK

are measured by dividing the ac voltage drop across the device by the ac current applied. The specified limits are for I

Z(ac)

= 0.1 I

Z(dc)

with the ac frequency = 60Hz.

3. Maximum Zener Current Ratings (I

ZM

)

The maximum current handling capability on a worst case basis is limited by the actual zener voltage at the operation point and the power derating curve.

Top Mark Information

Device Line 1 Line 2 Line 3

1N957B

1N958B

1N959B

1N960B

1N961B

LOGO

57

58

59

60

61

B

1N962B

1N963B

1N964B

1N965B

1N966B

LOGO

62

63

64

65

66

B

1N967B

1N968B

1N969B

1N970B

1N971B

LOGO

67

68

69

70

71

B

1N972B

1N973B

1N974B

1N975B

1N976B

LOGO

72

73

74

75

76

B

1N977B

1N978B

1N979B

LOGO

77

78

79

B

3 www.fairchildsemi.com

1N957B - 1N979B Rev. F1

1N957B - 1N979B Zener Diodes

Top Mark Information (Continued)

General Requirements:

1.0 Cathode Band

2.0 First Line: F - Fairchild Logo

3.0 Second Line: Device name - For 1Nxx series: 4

th

to 5

th

characters of the device name.

For BZxx series: 5

th

to 6

th

characters of the device name.

4.0 Third Line: Device name - For 1Nxx series: 6

th

to 7

th

characters of the device name.

For BZXyy series: Voltage rating

5.0 Devices shall be marked as required in the device specification (PID or FSC Test Spec).

6.0 Maximum no. of marking lines: 3

7.0 Maximum no. of digits per line: 2

8.0 FSC logo must be 20 % taller than the alphanumeric marking and should occupy the 2 characters of the specified line.

9.0 Marking Font: Arial (Except FSC Logo)

10.0 First character of each marking line must be aligned vertically.

11.0 All device markings must be based on Fairchild device specification.

F

22

9B

1

st

line: F - Fairchild Logo

2

nd

line: Device Name - 4

th

to 5

th

characters of the device name.

or 5

th

to 6

th

characters for BZXyy series

3

rd

line: Device Name - 6

th

to 7

th

characters of the device name.

or Voltage rating for BZXyy series

1N960BTR

1N960BTR

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