Silicon Zener Diode Series
1N957B thru 1N992B
Features
•
•
•
•
•
Available in JAN, JANTX and JANTXV per MIL-PRF-19500/117
Standard voltage tolerences are plus/minus 5%
with B suffix, 10% with A suffix identification.
Tight tolerences available in plus or minus 2% or
1% with C or D suffix respectively.
500 mW power handling
Hermetically sealed axial-leaded glass DO-35 package.
Maximum Ratings
Operating & Storage Temperature: -65°C to +175°C
Thermal Resistance:
Steady-State Power:
250°C/W
0.5 watts
Foward Voltage @200 MA: 1.1 V for 1N 975B - 1N985B
1.3 V for 1N985 - 1N992B
Electrical Specifications @ +25 ºC (Unless Otherwise Specified)
JEDEC
TYPE
Number
(Note1)
1N957B
1N958B
1N959B
1N960B
1N961B
1N962B
1N963B
1N964B
1N965B
1N966B
1N967B
1N968B
1N969B
1N970B
1N971B
1N972B
1N973B
1N974B
1N975B
1N976B
1N977B
1N978B
1N979B
1N980B
1N981B
1N982B
1N983B
1N984B
1N985B
1N986B
1N987B
1N988B
1N989B
1N990B
1N991B
1N992B
Normal
Zener
Voltage
Vz
Volts
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
75
82
91
100
110
120
130
150
160
180
200
Zener
Test
Current
IZT
mA
18.5
16.5
15.0
14.0
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
1.7
1.5
1.4
1.3
1.1
1.0
0.95
0.85
0.80
0.68
0.65
Maximum Zener
Impedance Zener
ZZT @ IZT
Ohms
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
270
330
400
500
750
900
1100
1500
1700
2200
2500
ZZK
Ohms
700
700
700
700
700
700
700
700
700
700
750
750
750
750
750
1000
1000
1000
1000
1000
1500
1500
2000
2000
2000
2000
3000
3000
3000
4000
4500
5000
6000
6500
7100
8000
@
IZK
mA
1.0
.5
.5
.5
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
Maximum DC
Current
IZM
mA
55
50
45
41
38
32
31
28
25
24
20
18
16
15
13
12
11
10
9.5
8.8
7.9
7.4
6.8
6.0
5.5
5.0
4.6
4.1
3.7
3.3
3.1
2.7
2.4
2.2
2.0
1.8
Maxmum Surge
Leakage
IZSM
mA
300
275
250
225
200
175
160
150
130
120
110
100
90
80
70
65
60
55
46
44
40
37
35
30
28
26
23
21
18
16
15
13
12
11
10
9
Maximum Reverse
Current
IR @ VR
μA
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
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
56.0
62.2
69.2
76.0
83.6
91.2
98.8
114.0
121.6
136.8
152.0
Maximum
Temperature
Coefficient
α
VZ
%/°C
+0.05
+0.058
+0.065
+0.068
+0.075
+0.076
+0.077
+0.079
+0.082
+0.083
+0.085
+0.086
+0.087
+0.088
+0.090
+0.091
+0.092
+0.093
+0.094
+0.095
+0.095
+0.096
+0.096
+0.097
+0.097
+0.098
+0.098
+0.099
+0.11
+0.11
+0.11
+0.11
+0.11
+0.11
+0.11
+0.11
NOTE 1:
The JEDEC type numbers shown (B Suffix) have a +5% tolerence on nominal Zener Votlage. The suffix A is used to identify +10%
tolerance; suffix C is used to identify +2%: and suffix D is used identify +1%; no suffix indicates +20%.
Revision Date: 11/4/2009
New Product
1
1N957B thru 1N992B
Outline Drawing
LEADED DESIGN DATA
0.080 MAX
2.03 DIA
1.000
MIN
25.400
CASE: Hermetically sealed, DO – 35
LEAD MATERIAL: Copper clad steel
LEAD FINISH: Tin / Lead
THERMAL RESISTANCE: (R
ӨJEC
): 70 °C/W maximum at L = 0.375 in
THERMAL IMPEDANCE: (Z
ӨJX
): 12 °C/W maximum
POLARITY: Cathode end is banded.
MOUNTING POSITION: Any
POLARITY
BAND
(CATHODE)
0.175
MAX
4.44
0.018 / 0.022
DIA
0.457 / 0.559
1.000
MIN
25.400
All dimensions in INCH
mm
Graphs
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Revision Date: 11/4/2009
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