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1N4728 Datasheet, PDF (1/3 Pages) Semtech Corporation – SILICON PLANAR POWER ZENER DIODES　
DIGITRON SEMICONDUCTORS
1N4728-1N4764
SILICON 1 WATT ZENER DIODES
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 @ TL ≤ 95°C
1.0W @ TA ≤ 35°C
1.2 volts maximum
260°C for 10 s maximum
ELECTRICAL CHARACTERISTICS @ 25°C AMBIENT
Type
Number
Zener
Voltage(4)
(VZ)
Test
Current
(lZT)
Maximum
Dynamic
Impedance(2)
(ZZT @ lZT)
Maximum
Reverse
Current
(lR @ VR)
Test
Voltage
(VR)
Maximum
Regulator
Current (lZM)
TA = 50°C
Maximum
Knee
Impedance(2)
(ZZK @ lZK)
Test
Current
(lZK)
Maximum
(Surge)
Current(3)
(lS)
1N4728
1N4729
1N4730
1N4731
1N4732
1N4733
1N4734
1N4735
1N4736
1N4737
1N4738
1N4739
1N4740
1N4741
1N4742
1N4743
1N4744
1N4745
1N4746
1N4747
1N4748
1N4749
1N4750
1N4751
VOLTS
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
22
24
27
30
mA
76
69
64
58
53
49
45
41
37
34
31
28
25
23
21
19
17
15.5
14
12.5
11.5
10.5
9.5
8.5
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
16
20
22
23
25
35
40
μA
VOLTS
mA
100
1
276
100
1
252
50
1
234
10
1
217
10
1
193
10
1
178
10
2
162
10
3
146
10
4
133
10
5
121
10
6
110
10
7
100
10
7.6
91
5
8.4
83
5
9.1
76
5
9.9
69
5
11.4
61
5
12.2
57
5
13.7
50
5
15.2
45
5
16.7
41
5
18.2
38
5
20.6
34
5
22.8
30
OHMS
400
400
400
400
500
550
600
700
700
700
700
700
700
700
700
700
700
700
750
750
750
750
750
1000
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
0.25
0.25
0.25
0.25
0.25
0.25
0.25
mA
1380
1260
1190
1070
970
890
810
730
660
605
550
500
454
414
380
344
304
285
250
225
205
190
170
150
144 Market Street
Kenilworth NJ 07033 USA
phone +1.908.245-7200
fax +1.908.245-0555
sales@digitroncorp.com
www.digitroncorp.com
Rev. 20120912
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