VISHAY
ZM4728A to ZM4764A
Document Number 85786
Rev. 1.3, 19-Mar-04
Vishay Semiconductors
www.vishay.com
1
18315
Zener Diodes
Features
• Silicon Planar Power Zener Diodes.
• For use in stablilizing and clipping circuits with
high power rating.
• Standard Zener voltage tolerance is ± 5 %.
• These diodes are also available in the DO-41 case
with type designation 1N4728 A... 1N4764A
Mechanical Data
Case: MELF Glass Case
Weight: approx. 250 mg
Packaging Codes/Options:
GS18 / 10 k per 13" reel (8 mm tape), 10 k/box
GS08 / 3 k per 13" reel (8 mm tape), 15 k/box
Absolute Maximum Ratings
Tamb = 25 °C, unless otherwise specified
1) Valid provided that electrodes are kept at ambient temperature.
Thermal Characteristics
Tamb = 25 °C, unless otherwise specified
1) Valid provided that electrodes are kept at ambient temperature.
Parameter Test condition Symbol Value Unit
Zener current (see Table
"Characteristics")
Power dissipation Ptot 1.0 1) W
Parameter Test condition Symbol Value Unit
Thermal resistance junction to
ambient air
RθJA 170 1) °C/W
Junction temperature Tj150 °C
Storage temperature TS- 65 to + 150 °C
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Document Number 85786
Rev. 1.3, 19-Mar-04
VISHAY
ZM4728A to ZM4764A
Vishay Semiconductors
Electrical Characteristics
1) The Zener impedance is derived from the 1KHZ AC voltage which results when an AC current having an RMS value equal to 10 % of
the Zener current (IZT or IZK) is superimposed on IZT or IZK. 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 electrodes at a distance of 10 mm from case are kept at ambient temperature
3) Measured under thermal equilibrium and DC test conditions.
Partnumber Nominal
Zener
Voltage3)
Test
Current
Maximum Zener Impedance1) Maximum Reverse
Leakage Current
Surge
current
Maximum
Reverse
Leakage
Current2)
VZ @ IZT IZT ZZT @ IZT ZZK @ IZK IZK IRVRIR @ Tamb =
25 °C
IZM
VmA ΩmA µA V mA µA
ZM4728 3.3 76 10 400 1 100 1 1380 276
ZM4729 3.6 69 10 400 1 100 1 1260 252
ZM4730 3.9 64 9 400 1 50 1 1190 234
ZM4731 4.3 58 9 400 1 10 1 1070 217
ZM4732 4.7 53 8 500 1 10 1 970 193
ZM4733 5.1 49 7 550 1 10 1 890 178
ZM4734 5.6 45 5 600 1 10 2 810 162
ZM4735 6.2 41 2 700 1 10 3 730 146
ZM4736 6.8 37 3.5 700 1 10 4 660 133
ZM4737 7.5 34 4 700 0.5 10 5 605 121
ZM4738 8.2 31 4.5 700 0.5 10 6 550 110
ZM4739 9.1 28 5 700 0.5 10 7 500 100
ZM4740 10 25 7 700 0.25 10 7.6 454 91
ZM4741 11 23 8 700 0.25 5 8.4 414 83
ZM4742 12 21 9 700 0.25 5 9.1 380 76
ZM4743 13 19 10 700 0.25 5 9.9 344 69
ZM4744 15 17 14 700 0.25 5 11.4 304 61
ZM4745 16 15.5 16 700 0.25 5 12.2 285 57
ZM4746 18 14 20 750 0.25 5 13.7 250 50
ZM4747 20 12.5 22 750 0.25 5 15.2 225 45
ZM4748 22 11.5 23 750 0.25 5 16.7 205 41
ZM4749 24 10.5 25 750 0.25 5 18.2 190 38
ZM4750 27 9.5 35 750 0.25 5 20.6 170 34
ZM4751 30 8.5 40 1000 0.25 5 22.8 150 30
ZM4752 33 7.5 45 1000 0.25 5 25.1 135 27
ZM4753 36 7 50 1000 0.25 5 27.4 125 25
ZM4754 39 6.5 60 1000 0.25 5 29.7 115 23
ZM4755 43 6 70 1500 0.25 5 32.7 110 22
ZM4756 47 5.5 80 1500 0.25 5 35.8 95 19
ZM4757 51 5 95 1500 0.25 5 38.8 90 18
ZM4758 56 4.5 110 2000 0.25 5 42.6 80 16
ZM4759 62 4 125 2000 0.25 5 47.1 70 14
ZM4760 68 3.7 150 2000 0.25 5 51.7 65 13
ZM4761 75 3.3 175 2000 0.25 5 56 60 12
ZM4762 82 3 200 3000 0.25 5 62.2 55 11
ZM4763 91 2.8 250 3000 0.25 5 69.2 50 10
ZM4764 100 2.5 350 3000 0.25 5 76 45 9
VISHAY
ZM4728A to ZM4764A
Document Number 85786
Rev. 1.3, 19-Mar-04
Vishay Semiconductors
www.vishay.com
3
Typical Characteristics (Tamb = 25 °C unless otherwise specified)
Package Dimensions in mm (Inches)
Fig. 1 Admissible Power Dissipation vs. Ambient Temperature
18289
Cathode Mark
18317
1.25 (0.049)
MIN
4.00 (0.157)
MAX
6.50 (0.256)
REF
3.00 (0.118)
MIN
5.2 (0.205)
4.8 (0.189)
2.6 (0.102)
2.4 (0.094)
0.55 (0.022)
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Document Number 85786
Rev. 1.3, 19-Mar-04
VISHAY
ZM4728A to ZM4764A
Vishay Semiconductors
Ozone Depleting Substances Policy Statement
It is the policy of Vishay Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and
operatingsystems with respect to their impact on the health and safety of our employees and the public, as
well as their impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are
known as ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs
and forbid their use within the next ten years. Various national and international initiatives are pressing for an
earlier ban on these substances.
Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the
use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments
respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design
and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each
customer application by the customer. Should the buyer use Vishay Semiconductors products for any
unintended or unauthorized application, the buyer shall indemnify Vishay Semiconductors against all
claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal
damage, injury or death associated with such unintended or unauthorized use.
Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
