High-reliability discrete products
and engineering services since 1977
FEATURES
1N4728(A)-1N4764(A)
1 WATT ZENER DIODES
Available as “HR” (high reliability) screened per MIL-PRF-19500, JANTX level. Add “HR” suffix to base part number.
Available as non-RoHS (Sn/Pb plating), standard, and as RoHS by adding “-PBF” suffix.
MAXIMUM RATINGS
Characteristics
Power dissipation @ 25°C
Junction temperature
Operating and storage temperature range
Maximum thermal resistance, junction to lead
@ 3/8 inch lead length from body
Maximum thermal resistance, junction to ambient
when mounted on FR4 PC board with 4mm2 copper pads and track width 1mm, length 25mm
Steady state power
@ 3/8 inch lead length from body
when mounted on FR4 PC board with 4mm2 copper pads and track width 1mm, length 25mm
Forward voltage @ 200mA
Solder temperatures
Value
1W
175°C
-65 to +175°C
80°C/W
140°C/W
1.0W @ T
L
≤ 95°C
1.0W @ T
A
≤ 35°C
1.2 volts maximum
260°C for 10 s maximum
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise specified)
Type
Number
Zener
Voltage
(4)
(V
Z
)
VOLTS
1N4728
1N4729
1N4730
1N4731
1N4732
1N4733
1N4734
1N4735
1N4736
1N4737
1N4738
1N4739
1N4740
1N4741
1N4742
1N4743
1N4744
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
Test
Current
(l
ZT
)
mA
76
69
64
58
53
49
45
41
37
34
31
28
25
23
21
19
17
Maximum
Dynamic
Impedance
(2)
(Z
ZT
@ l
ZT
)
OHMS
10
10
9.0
9.0
8.0
7.0
5.0
2.0
3.5
4.0
4.5
5.0
7.0
8.0
9.0
10
14
Maximum
Reverse
Current (l
R
@ V
R
)
μA
100
100
50
10
10
10
10
10
10
10
10
10
10
5
5
5
5
Test
Voltage
(V
R
)
VOLTS
1
1
1
1
1
1
2
3
4
5
6
7
7.6
8.4
9.1
9.9
11.4
Maximum
Regulator
Current (l
ZM
)
T
A
= 50°C
mA
276
252
234
217
193
178
162
146
133
121
110
100
91
83
76
69
61
Maximum
Knee
Impedance
(2)
(Z
ZK
@ l
ZK
)
OHMS
400
400
400
400
500
550
600
700
700
700
700
700
700
700
700
700
700
Test
Current
(l
ZK
)
mA
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
0.5
0.5
0.5
0.25
0.25
0.25
0.25
0.25
Maximum
(Surge)
Current
(3)
(l
S
)
mA
1380
1260
1190
1070
970
890
810
730
660
605
550
500
454
414
380
344
304
Rev. 20120912
High-reliability discrete products
and engineering services since 1977
ELECTRICAL CHARACTERISTICS
Type
Number
Zener
Voltage
(V
Z
)
VOLTS
1N4745
1N4746
1N4747
1N4748
1N4749
1N4750
1N4751
1N4752
1N4753
1N4754
1N4755
1N4756
1N4757
1N4758
1N4759
1N4760
1N4761
1N4762
1N4763
1N4764
16
18
20
22
24
27
30
33
36
39
43
47
51
56
62
68
75
82
91
100
Test
Current
(l
ZT
)
mA
15.5
14
12.5
11.5
10.5
9.5
8.5
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.7
3.3
3.0
2.8
2.5
Maximum
Dynamic
Impedance
(Z
ZT
@ l
ZT
)
OHMS
16
20
22
23
25
35
40
45
50
60
70
80
95
110
125
150
175
200
250
350
1N4728(A)-1N4764(A)
1 WATT ZENER DIODES
Maximum
Reverse
Current (l
R
@ V
R
)
μA
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
Maximum
Regulator
Current (l
ZM
)
T
A
= 50°C
mA
57
50
45
41
38
34
30
27
25
23
22
19
18
16
14
13
12
11
10
9
Test
Voltage
(V
R
)
VOLTS
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
Maximum
Knee
Impedance
(Z
ZK
@ l
ZK
)
OHMS
700
750
750
750
750
750
1000
1000
1000
1000
1500
1500
1500
2000
2000
2000
2000
3000
3000
3000
Test
Current
(l
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
0.25
0.25
0.25
Maximum
(Surge)
Current (l
S
)
mA
285
250
225
205
190
170
150
135
125
115
110
95
90
80
70
65
60
55
50
45
Rev. 20120912
High-reliability discrete products
and engineering services since 1977
MECHANICAL CHARACTERISTICS
Case:
Marking:
Polarity:
DO-41
Body painted, alpha-numeric
Cathode band
1N4728(A)-1N4764(A)
1 WATT ZENER DIODES
Rev. 20120912
stm32/stm8
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