Zeners 1N957B - 1N991B
Zeners
1N957B - 1N991B
Absolute Maximum Ratings *
Symbol
P
D
Parameter
Power Dissipation
@ TL
≤
75°C, Lead Length = 3/8”
Derate above 75°C
T
J
, T
STG
Operating and Storage Temperature Range
T
A
= 25°C unless otherwise noted
Tolerance = 5%
Units
mW
mW/°C
°C
Value
500
4.0
-65 to +200
* These ratings are limiting values above which the serviceability of the diode may be impaired.
DO-35 Glass case
COLOR BAND DENOTES CATHODE
Electrical Characteristics
V
Z
(Volts)
Device
1N957BT
1N958BT
1N959BT
1N960BT
1N961BT
1N962BT
1N963BT
1N964BT
1N965BT
1N966BT
1N967BT
1N968BT
1N969B
1N970B
1N971B
1N972B
1N973B
1N974B
1N975B
1N976B
1N977B
1N978B
1N979B
1N980B
1N981B
Min.
6.46
7.125
7.79
8.645
9.5
10.45
11.4
12.35
14.25
15.2
17.1
19
20.9
22.8
25.65
28.5
31.35
34.2
37.05
40.85
44.65
48.45
53.2
58.9
64.6
Typ.
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
56
62
68
T
A
=25°C unless otherwise noted
(Note 1)
Z
Z
(Ω)
Ω
@ I
Z
(mA)
18.5
16.5
15
14
12.5
11.5
10.5
9.5
8.5
7.8
7.0
6.2
5.6
5.2
4.6
4.2
3.8
3.4
3.2
3.0
2.7
2.5
2.2
2.0
1.8
Z
Z
@ I
Z
4.5
5.5
6.5
7.5
8.5
9.5
11.5
13
16
17
21
25
29
33
41
49
58
70
80
93
105
125
150
185
230
(Note 2)
I
R
@ V
R
mA
1.0
0.5
0.5
0.5
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
µ
A
150
75
50
25
10
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
Volts
5.2
5.7
6.2
6.9
7.6
8.4
9.1
9.9
11.4
12.2
13.7
15.2
16.7
18.2
20.6
22.8
25.1
27.4
29.7
32.7
35.8
38.8
42.6
47.1
51.7
Max.
7.14
7.875
8.61
9.555
10.5
11.55
12.6
13.65
15.75
16.8
18.9
21
23.1
25.2
28.35
31.5
34.65
37.8
40.95
45.15
49.35
53.55
58.8
65.1
71.4
Z
ZK
@ I
ZK
Ω
700
700
700
700
700
700
700
700
700
700
750
750
750
750
750
1000
1000
1000
1000
1500
1500
1500
2000
2000
2000
I
ZM
(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
4.9
4.5
©2003 Fairchild Semiconductor Corporation
1N957B - 1N991B, Rev. D1
Zeners 1N957B - 1N991B
Electrical Characteristics
(Continued)
V
Z
(Volts)
Device
1N982B
1N983B
1N984B
1N985B
1N986B
1N987B
1N988B
1N989B
1N990B
1N991B
Min.
71.25
77.9
86.45
95
104.5
114
123.5
142.5
152
171
Typ.
75
82
91
100
110
120
130
150
160
180
(Note 1)
T
A
=25°C unless otherwise noted
Z
Z
(Ω)
Ω
@ I
Z
1.7
1.5
1.4
1.3
1.1
1.0
0.95
0.85
0.80
0.68
Z
Z
@ I
Z
270
330
400
500
750
900
1100
1500
1700
2200
(Note 2)
I
R
@ V
R
mA
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
µ
A
5
5
5
5
5
5
5
5
5
5
Volts
56.0
62.2
69.2
76.0
83.6
91.2
98.8
114
121.6
136.8
Max.
78.75
86.1
95.55
105
115.5
126
136.5
157.5
168
189
Z
ZK
@ I
ZK
Ω
2000
3000
3000
3000
4000
4500
5000
6000
6500
7100
I
ZM
(mA)
(Note 3)
4.1
3.7
3.3
3.0
2.7
2.5
2.3
2.0
1.9
1.7
Notes:
1. Zener Voltage (V
Z
) Measurement
Nominal zener voltage is measured with the device junction in the themal 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.
©2003 Fairchild Semiconductor Corporation
1N957B - 1N991B, Rev. D1
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Formative or
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This datasheet contains the design specifications for
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