1N957B, -1 thru 1N992B, -1 DO-35
Silicon 500 mW Zener Diodes
S C O T T S D A L E D I V I S I O N
ELECTRICAL CHARACTERISTICS* @ 25oC
NOMINAL
MAX. DC
ZENER
VOLTAGE
(Note 2)
ZENER
TEST
ZENER
CURRENT
(Note 4)
MAX. SURGE
CURRENT
(Note 5)
MAX. REVERSE
LEAKAGE
MAX. ZENER IMPEDANCE
(Note 3)
MAX. TEMP.
JEDEC
TYPE
COEFFICIENT
VZ
IZT
IZM
IZSM
IRCURRENT
@
VR
α
CURRENT
ZZT @ IZT
ZZK
@ IZK
NUMBER
(Note 1)
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
VZ
VOLTS
6.8
7.5
8.2
9.1
10
mA
18.5
16.5
15.0
14.0
12.5
11.5
10.5
9.5
OHMS
4.5
OHMS
700
mA
mA
55
mA
300
275
250
225
200
175
160
150
130
120
110
100
90
µA
150
75
50
25
10
5
VOLTS
5.2
%/oC
+0.05
1.0
.5
5.5
700
50
5.7
+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
6.5
700
.5
45
6.2
7.5
700
.5
41
6.9
8.5
700
.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
38
7.6
11
9.5
700
32
8.4
12
11.5
13.0
16
700
31
5
9.1
13
700
28
5
9.9
15
8.5
700
25
5
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
16
7.8
17
700
24
5
18
7.0
21
750
20
5
20
6.2
25
750
18
5
22
5.6
29
750
16
5
24
5.2
33
750
15
80
5
27
4.6
41
750
13
70
5
30
4.2
49
1000
1000
1000
1000
1500
1500
1500
2000
2000
2000
2000
3000
3000
3000
4000
4500
5000
6000
6500
7100
8000
12
65
5
33
3.8
58
11
60
5
36
3.4
70
10
55
5
39
3.2
80
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
46
5
43
3.0
93
44
5
47
2.7
105
125
150
185
230
270
330
400
500
750
900
1100
1500
1700
2200
2500
40
5
51
2.5
37
5
56
2.2
35
5
62
2.0
30
5
68
1.8
28
5
75
1.7
26
5
82
1.5
23
5
91
1.4
21
5
100
110
120
130
150
160
180
200
1.3
18
5
1.1
16
5
+0.11
1.0
15
5
+0.11
0.95
0.85
0.80
0.68
0.65
13
5
+0.11
12
5
+0.11
11
5
+0.11
10
5
+0.11
9
5
+0.11
* JEDEC Registered Data
NOTE 1: The JEDEC type numbers shown (B suffix) have a +/-5% tolerance on nominal Zener voltage. The suffix A is used to identify +/-
10% tolerance; suffix C is used to identify +/-2%; and suffix D is used to identify +/-1% tolerance; no suffix indicates +/-20%
tolerance.
NOTE 2: Zener voltage (VZ) is measured after the test current has been applied for 20 +/- 5 seconds. The device shall be suspended by its
leads with the inside edge of the mounting clips between .375” and .500” from the body. Mounting clips shall be maintained at a
temperature of 25 +8/ -2oC.
NOTE 3: The zener impedance is derived when a 60 cycle ac current having an rms value equal to 10% of the dc zener current (IZT or
IZK) is superimposed on IZT or IZK. Zener impedance is measured at 2 points to ensure a sharp knee on the breakdown curve
and to eliminate unstable units. See MicroNote 202 for variation in dynamic impedance with different zener currents.
NOTE 4: The values of IZM are calculated for a +/- 5% tolerance on nominal zener voltage. Allowance has been made for the rise in zener
voltage above VZT which results from zener impedance and the increase in junction temperature as power dissipation approaches
400 mW. In the case of individual diodes IZM is that value of current which results in a dissipation of 400 mW at 75oC lead
temperature at 3/8” from body.
NOTE 5: The surge for IZSM is a square wave or equivalent half-sine wave pulse of 1/120 sec. duration.
Copyright 2003
10-31-2003 REV B
Microsemi
Scottsdale Division
Page 2
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
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