1N957 thru 1N984
Nominal Zener Voltage 6.8 to 91 Volts
Zener Diodes
Power Dissipation 500mW
Features
Silicon Planar Power Zener Diodes.
Standard Zener voltage tolerance is
±
5% for “A” suffix, and
±
10% for “B” suffix . Other tolerances are available upon
request.
Mechanical Data
Case: DO-35 Glass Case
Weight: approx. 0.13 gram
Maximum Ratings and Thermal Characteristics
(T
A
=25
o
C unless otherwise noted)
Parameter
Zener current (see Table "Characteristics")
Power dissipation at T
L
=25
o
C
Thermal resistance junction to ambient air
Junction temperature
Storage temperature range
P
tot
R
θ
JA
T
j
T
S
500
300
(1)
Symbol
Value
Unit
mW
o
(1)
C/W
o
175
-65 to +175
C
C
o
Notes:
1. Valid provided that leads at a distance of 3/8" from case are kept at ambient temperature.
485
Electrical Characteristics
(T
J
=25
o
C unless otherwise noted)
Maximum V
F
=0.9V at I
F
=10mA
Maximum reverse current
Nominal
z ener voltage
V
Z (3)
(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
Test
current
I
ZT
(mA)
18.5
16.5
15
14
12.5
11.5
10.5
9.5
8.5
7.8
7
6.2
5.6
5.2
4.6
4.2
3.8
3.4
3.2
3
2.7
2.5
2.2
2.0
1.8
1.7
1.5
1.4
Maximum z ener impedance
Z
ZT
@
I
ZT
(Ω)
Ω
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
440
Z
ZK
@
I
ZK
(Ω)
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
2000
3000
3000
I
ZK
(mA)
1
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
0.25
0.25
0.25
(1)
Type
number
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
Maximum
regulator current
I
ZM(2)
(mA)
58
53
47
43
40
36
32
29
27
24
21
20
18
16
14
13
12
11
10
9.2
8.5
7.8
6.9
6.3
5.7
5.2
4.7
4.3
I
R
Maximum
(uA)
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
Test voltage V
dc
(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
Notes:
1. The Zener Impedance is derived from the 1 KHZ AC voltage which results when an AC current having an RMS value equal to 10% of the Zener current
(I
ZT
) is superimposed on I
ZT
. Zener Impedance is measured at two points to insure a sharp knee on the breakdown curve and to eliminate unstable units.
2. Valid provided that leads at a distance of 3/8" from case are kept at 25
o
C ambient temperature.
3. Measured with device junction in thermal equilibrium.
486
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