Document
1N957B - 1N979B Zener Diodes
1N957B - 1N979B
Zener Diodes
Tolerance = 5%
June 2007
DO-35 Glass case
COLOR BAND DENOTES CATHODE
Absolute Maximum Ratings * TA = 25°C unless otherwise noted
Symbol
Parameter
PD Power Dissipation @ TL ≤ 75°C, Lead Length = 3/8”
Derate above 75°C
TJ, TSTG
Operating and Storage Temperature Range
* These ratings are limiting values above which the serviceability of the diode may be impaired.
Electrical Characteristics TA=25°C unless otherwise noted
Device
Min.
VZ (Volts) (Note 1)
Typ.
Max.
@ IZ (mA)
ZZ (Ω) (Note 2)
ZZ @ IZ
ZZK @ IZK Ω mA
1N957B 1N958B 1N959B 1N960B 1N961B
6.46 6.8 7.14 18.5
7.125
7.5
7.875
16.5
7.79 8.2 8.61 15
8.645 9.1 9.555 14
9.5 10 10.5 12.5
4.5 700 1.0 5.5 700 0.5 6.5 700 0.5 7.5 700 0.5 8.5 700 0.25
1N962B 1N963B 1N964B 1N965B 1N966B
10.45
11
11.55
11.5
9.5 700 0.25
11.4 12 12.6 10.5 11.5 700 0.25
12.35
13
13.65
9.5
13 700 0.25
14.25
15
15.75
8.5
16 700 0.25
15.2 16 16.8 7.8
17 700 0.25
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
21 750 0.25 25 750 0.25 29 750 0.25 33 750 0.25 41 750 0.25
1N972B 1N973B 1N974B 1N975B 1N976B
8.5 30 31.5 4.2
31.35
33
34.65
3.8
34.2 36 37.8 3.4
37.05
39
40.95
3.2
40.85
43
45.15
3.0
49 1000 0.25 58 1000 0.25 70 1000 0.25 80 1000 0.25 93 1500 0.25
1N977B 1N978B 1N979B
44.65
47
49.35
2.7
48.45
51
53.55
2.5
53.2 56 58.8 2.2
105 1500 0.25 125 1500 0.25 150 2000 0.25
Value 500
4.0 -65 to +200
IR @ VR
μA Volts
150 5.2 75 5.7 50 6.2 25 6.9 10 7.6 5 8.4 5 9.1 5 9.9 5 11.4 5 12.2 5 13.7 5 15.2 5 16.7 5 18.2 5 20.6 5 22.8 5 25.1 5 27.4 5 29.7 5 32.7 5 35.8 5 38.8 5 42.6
Units mW
mW/°C °C
IZM (mA)
(Note 3)
47 42 38 35 32 28 26 24 21 19 17 15 14 13 11 10 9.2 8.5 7.8 7.0 6.4 5.9 5.4
©2007 Fairchild Semiconductor Corporation
1N957B - 1N979B Rev. F1
1
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1N957B - 1N979B Zener Diodes
Notes:
1. Zener Voltage (VZ) Measurement Nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (TL) at 30°C ± 1°C and 3/8” lead length.
2. Zener Impedance (ZZ) Derivation ZZT and ZZK are measured by dividing the ac voltage drop across the device by the ac current applied. The specified limits are for IZ(ac) = 0.1 IZ(dc) with the ac frequency = 60Hz.
3. Maximum Zener Current Ratings (IZM) 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
1N957B 1N958B 1N959B 1N960B 1N961B
1N962B 1N963B 1N964B 1N965B 1N966B
1N967B 1N968B 1N969B 1N970B 1N971B
1N972B 1N973B 1N974B 1N975B 1N976B
1N977B 1N978B 1N979B
Device
Line 1
LOGO LOGO LOGO LOGO LOGO
LOGO LOGO LOGO LOGO LOGO
LOGO LOGO LOGO LOGO LOGO
LOGO LOGO LOGO LOGO LOGO
LOGO LOGO LOGO
Line 2
57 58 59 60 61
62 63 64 65 66
67 68 69 70 71
72 73 74 75 76
77 78 79
Line 3
B B B B B
B B B B B
B B B B B
B B B B B
B B B
1N957B - 1N979B Rev. F1
2
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1N957B - 1N979B Zener Diodes
Top Mark Information (Continued)
F 1st line: F - Fairchild Logo
22 2nd line: Device Name - 4th to 5th characters of the device name.
or 5th to 6th characters for BZXyy series
9B
3rd line: Device Name - 6th to 7th characters of the device name. or Voltage rating for BZXyy series
General Requirements:
1.0 Cathode Band 2.0 First Line: F - Fairchild Logo 3.0 Second Line: Device name - For 1Nxx series: 4th to 5th characters of the device name.
For BZxx series: 5th to 6th characters of the device name. 4.0 Third Line: Device name - For 1Nxx series: 6th to 7th 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.
1N957B - 1N979B Rev. F1
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1N957B - 1N979B Zener Diodes
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