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MEI
Lead Free
RoHS Compliant
ZENER DIODE
1N4728A THRU 1N4764A
FEATURES
Planer die construction
General Purpose, high power device
1W power dissipation
Also available in an SMA package as the SML4728A series
Also available in a Glass Melf package as the ZM4728A series
VOLTAGE RANGE
POWER DISSIPATION
3.3 to 100 Volts
1.0 Watt
MECHANICAL DATA
Case: Plastic DO-41
Leads: Solderable per MIL-STD 750,
Method 2026
Polarity: Color band denotes cathode end
Weight: 0.00035 ounce, 0.01 gram
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25OC ambient temperature unless otherwise specified
Device Characteristics – See table
Power dissipation (Note 1)
Typical Thermal Resistance (Note 1)
Operating Junction Temperature Range
Storage Temperature Range
SYMBOL
PD
RθJA
TJ
TSTG
Notes:
1. Provided terminals are kept at ambient temperature
DO-41
VALUE
1.0
170
(-65 to +150)
(-65 to +150)
UNIT
Watt
OC/W
OC
OC

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MEI
Lead Free
RoHS Compliant
RATINGS FOR 1N4728A THRU 1N4764A
Electrical Characteristics - All values at TA = 25OC unless otherwise specified
Type
Number
1N4728A
1N4729A
1N4730A
1N4731A
1N4732A
1N4733A
1N4734A
1N4735A
1N4736A
1N4737A
1N4738A
1N4739A
1N4740A
1N4741A
1N4742A
1N4743A
1N4744A
1N4745A
1N4746A
1N4747A
1N4748A
1N4749A
1N4750A
1N4751A
1N4752A
1N4753A
1N4754A
1N4755A
1N4756A
1N4757A
1N4758A
1N4759A
1N4760A
1N4761A
1N4762A
1N4763A
1N4764A
Nominal Zener
Voltage at IZT
(Note 2)
VZ IZT
(V) mA
3.3 76
3.6 69
3.9 64
4.3 58
4.7 53
5.1 49
5.6 45
6.2 41
6.8 37
7.5 34
8.2 31
9.1 28
10 25
11 23
12 21
13 19
15 17
16 15.5
18 14
20 12.5
22 11.5
24 10.5
27 9.5
30 8.5
33 7.5
36 7
39 6.5
43 6
47 5.5
51 5
56 4.5
62 4.0
68 3.7
75 3.3
82 3.0
91 2.8
100 2.5
Maximum Zener Impedance
(Note 1)
ZZT@ IZT ZZK @ IZK
Ohms
10 400
10 400
9.0 400
9.0 400
8.0 500
7.0 500
5.0 550
2.0 600
3.5 700
4.0 700
4.5 700
5.0 700
7.0 700
8.0 700
9.0 700
10 700
14 700
16 700
20 750
22 750
23 750
25 750
35 750
40 1000
45 1000
50 1000
60 1000
70 1500
80 1500
95 1500
110 2000
125 2000
150 2000
175 2000
200 3000
250 3000
350 3000
IZK
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
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 Reverse
Current
IR VR
µA V
100 1
100 1
50 1
10 1
10 1
10 1
10 2
10 3
10 4
10 5
10 6
10 7
10 7.6
5 8.4
5 9.1
5 9.9
5 11.4
5 12.2
5 13.7
5 15.2
5 16.7
5 18.2
5 20.6
5 22.8
5 25.1
5 27.4
5 29.7
5 32.7
5 35.8
5 38.8
5 42.6
5 47.1
5 51.7
5 56.0
5 62.2
5 69.2
5 76.0
Maximum Surge
Current
8.3mS
IZS
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
135
125
115
110
95
90
80
70
65
60
55
50
45
Maximum
Regulator
Current,
(Note 3)
IZM
mA
276
252
234
217
193
178
162
146
133
121
110
100
91
83
76
69
61
57
50
45
41
38
34
30
27
25
23
22
19
18
16
14
13
12
11
10
9
Notes:
1.
2.
3.
Zener impedance is derived from the 1KHz AC voltage which results when an AC current having and RMS value
equal to 10% if the Zener current is superimposed on IZT or IZK.
Measured under thermal equilibrium and DC test conditions
Valid provide that electrodes at a distance of 10mm from the case are kept at ambient temperature.

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MEI
Lead Free
RoHS Compliant
CHARACTERISTIC CURVES 1N4728A THRU 1N4764A