Fairchild 1N4728A, 1N4764A service manual
January 2005
1N4728A - 1N4764A Zeners
1N4728A - 1N4764A
Zeners
DO-41 Glass case
COLOR BAND DENOTES CATHODE
Absolute Maximum Ratings *
Symbol Parameter Value Units
P
T
, T
J
* These ratings are limiting values above which the serviceability of the diode may be impaired.
Power Dissipation
D
@ TL ≤ 50°C, Lead Length = 3/8”
Derate above 50°C6.67mW/°C
Operating and Storage Temperature Range -65 to +200 °C
STG
Electrical Characteristics
Ta = 25°C unless otherwise noted
1.0 W
Ta = 25°C unless otherwise noted
Device
1N4728A
1N4729A
1N4730A
1N4731A
1N4732A
1N4733A
1N4734A
1N4735A
1N4736A
1N4737A
1N4738A
1N4739A
1N4740A
1N4741A
1N4742A
1N4743A
1N4744A
1N4745A
1N4746A
1N4747A
(V) @ IZ
V
Z
(Note 1)
Min. Typ. Max.
3.315
3.42
3.705
4.085
4.465
4.845
5.32
5.89
6.46
7.125
7.79
8.645
9.5
10.45
11.4
12.35
14.25
15.2
17.1
19
3.3
3.6
3.9
4.3
4.7
5.1
5.6
6.2
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
20
3.465
3.78
4.095
4.515
4.935
5.355
5.88
6.51
7.14
7.875
8.61
9.555
10.5
11.55
12.6
13.65
15.75
16.8
18.9
21
Test Current
I
(mA)
Z
76
69
64
58
53
49
45
41
37
34
31
28
25
23
21
19
17
15.5
14
12.5
Max. Zener Impedance Leakage Current
Z
@ IZ
Z
(Ω)
10
10
9
9
8
7
5
2
3.5
4
4.5
5
7
8
9
10
14
16
20
22
ZZK @
I
(Ω)
ZK
400
400
400
400
500
550
600
700
700
700
700
700
700
700
700
700
700
700
750
750
I
ZK
(mA)
1
1
1
1
1
1
1
1
1
0.5
0.5
0.5
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
I
R
(µA)
100
100
50
10
10
10
10
10
10
10
10
10
10
5
5
5
5
5
5
5
V
(V)
7.6
8.4
9.1
9.9
11.4
12.2
13.7
15.2
R
1
1
1
1
1
1
2
3
4
5
6
7
©2005 Fairchild Semiconductor Corporation
1N4728A - 1N4764A Rev. G2
1
www.fairchildsemi.com
1N4728A - 1N4764A Zeners
Electrical Characteristics
(V) @ IZ
V
Z
Device
1N4748A
1N4749A
1N4750A
1N4751A
1N4752A
1N4753A
1N4754A
1N4755A
1N4756A
1N4757A
1N4758A
1N4759A
1N4760A
1N4761A
1N4762A
1N4763A
1N4764A
Notes:
1. Zener Voltage (VZ)
The 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.
Min. Typ. Max.
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
71.25
77.9
86.45
95
22
24
27
30
33
36
39
43
47
51
56
62
68
75
82
91
100
TC = 25°C unless otherwise noted
(Note 1)
Test Current
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
78.75
86.1
95.55
105
I
(mA)
Z
11.5
10.5
9.5
8.5
7.5
7
6.5
6
5.5
5
4.5
4
3.7
3.3
3
2.8
2.5
Max. Zener Impedance Leakage Current
Z
Z
@ IZ
(Ω)
23
25
35
40
45
50
60
70
80
95
110
125
150
175
200
250
350
ZZK @
I
(Ω)
ZK
750
750
750
1000
1000
1000
1000
1500
1500
1500
2000
2000
2000
2000
3000
3000
3000
I
ZK
(mA)
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
I
R
(µA)
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
VR
(V)
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
62.2
69.2
76
1N4728A - 1N4764A Rev. G2
2
www.fairchildsemi.com
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