VISHAY
SML4728 to SML4764A
Document Number 85782
Rev. 1.5, 03-Mar-04
Vishay Semiconductors
www.vishay.com
1
15811
Surface Mount Zener Diodes
Features
• Plastic package has Underwriters Laboratory
Flammability Classification 94 V-0
• For surface mounted applications
• Low Zener impedance
• Low regulation factor
• High temperature soldering guaranteed:
260 °C/10 seconds at terminals
• Standard voltage tolerance is 10 %, Suffix A ± 5 %.
Mechanical Data
Case: JEDEC DO-214AC molded plastic over
passivated junction
Terminals: Solder plated, solderable per
MIL-STD- 750, Method 2026
Polarity: Color band denotes positive end (cathode)
Mounting Position: Any
Weight: 0.002 ounce, 64 mg
Packaging Codes - Options (Antistatic):
SML4728 - SML4737A:
11T - 1.8 k per 7" plastic reel (12mm tape), 36 k/car-
ton
5AT - 7.5 k per 13" plastic reel (12mm tape), 75 k/car-
ton
SML4738 - SML4764A:
61 - 1.8 k per 7" plastic reel (12mm tape), 36 k/carton
5A - 7.5 k per 13" plastic reel (12mm tape), 75 k/car-
ton
Absolute Maximum Ratings
Tamb = 25 °C, unless otherwise specified
Thermal Characteristics
Tamb = 25 °C, unless otherwise specified
Parameter Test condition Symbol Value Unit
Power dissipation TL = 75 °C Ptot 1.0 W
Parameter Test condition Symbol Value Unit
Maximum junction temperature Tj150 °C
Storage temperature range TS- 65 to + 150 °C
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Document Number 85782
Rev. 1.5, 03-Mar-04
VISHAY
SML4728 to SML4764A
Vishay Semiconductors
Electrical Characteristics
1) Based on dc- measurement at thermal equilibrium
2) Surge current is a non-repetitive, 8.3 ms pulse width square wave or equivalent sine-wave superimposed on IZT per JEDEC Method
Partnumber Device
Marking
Code
Nominal
Zener
Voltage
Test
Current
Maximum Dynamic
ImpedanceResistance
Maximum DC Reverse
Leakage Current
Maximum
Surge
Current
VZ1) @ IZT IZT ZZT @ IZT ZZK @ IZK IZK IRVRIRM2)
VmA Ω Ω mA µA V mApk
SML4728 3P3 3.3 76 10 400 1 100 1 1380
SML4729 3P6 3.6 69 10 400 1 100 1 1260
SML4730 3P9 3.9 64 9 400 1 50 1 1190
SML4731 4P3 4.3 58 9 400 1 10 1 1070
SML4732 4P7 4.7 53 8 500 1 10 1 970
SML4733 5P1 5.1 49 7 550 1 10 1 890
SML4734 5P6 5.6 45 5 600 1 10 2 810
SML4735 6P2 6.2 41 2 700 1 10 3 730
SML4736 6P8 6.8 37 3.5 700 1 10 4 660
SML4737 7P5 7.5 34 4 700 0.5 10 5 605
SML4738 8P2 8.2 31 4.5 700 0.5 10 6 550
SML4739 9P1 9.1 28 5 700 0.5 10 7 500
SML4740 10 10 25 7 700 0.25 10 7.6 454
SML4741 11 11 23 8 700 0.25 5 8.4 414
SML4742 12 12 21 9 700 0.25 5 9.1 380
SML4743 13 13 19 10 700 0.25 5 9.9 344
SML4744 15 15 17 14 700 0.25 5 11.4 305
SML4745 16 16 15.5 16 700 0.25 5 12.2 285
SML4746 18 18 14 20 750 0.25 5 13.7 250
SML4747 20 20 12.5 22 750 0.25 5 15.2 225
SML4748 22 22 11.5 23 750 0.25 5 16.7 205
SML4749 24 24 10.5 25 750 0.25 5 18.2 190
SML4750 27 27 9.5 35 750 0.25 5 20.6 170
SML4751 30 30 8.5 40 1000 0.25 5 22.8 150
SML4752 33 33 7.5 45 1000 0.25 5 25.1 135
SML4753 36 36 7 50 1000 0.25 5 27.4 125
SML4754 39 39 6.5 60 1000 0.25 5 29.7 115
SML4755 43 43 6 70 1500 0.25 5 32.7 110
SML4756 47 47 5.5 80 1500 0.25 5 35.8 95
SML4757 51 51 5 95 1500 0.25 5 38.8 90
SML4758 56 56 4.5 110 2000 0.25 5 42.6 80
SML4759 62 62 4 125 2000 0.25 5 47.1 70
SML4760 68 68 3.7 150 2000 0.25 5 51.7 65
SML4761 75 75 3.3 175 2000 0.25 5 56 60
SML4762 82 82 3 200 3000 0.25 5 62.2 55
SML4763 91 91 2.8 250 3000 0.25 5 69.2 50
SML4764 100 100 2.5 350 3000 0.25 5 76 45
VISHAY
SML4728 to SML4764A
Document Number 85782
Rev. 1.5, 03-Mar-04
Vishay Semiconductors
www.vishay.com
3
Typical Characteristics (Tamb = 25 °C unless otherwise specified)
Fig. 1 Maximum Continuous Power Dissipation
Fig. 2 Typical Zener Impedance
Fig. 3 Typical Temperature Coefficients
25 50 75 100 125 150 175
0
0.25
0.5
0.75
1.0
Terminals Temperature ( °C)
PM(AV)
, Average Power Dissipation (W)
60 H
z
Resistive or
Inductive Load
P.C.B. Mounted on
0.31 x 0.31 x 0.08" (8x8x2mm)
copper areas pads
17923
0.5 10 100 500
1
10
100
1,000
IZT
, Zener Test Current (mA)
ZZ, Dynamic Zener Impedance (Ω)
TJ=25°C
VZ= 91V
VZ= 56V
VZ= 30V
VZ= 6.2V
17925
010 20 30 40 50 60 70 80 90 100
0
10
30
50
70
90
110
VZ, Zener Voltage (V)
ΘVZ, Temperature Coefficient (mV/ °C)
Tested at rated IZT
17927
Fig. 4 Typical Instantaneous Forward Characteristics for
SML4763
Fig. 5 Typical Reverse Characteristics
0.4 0.6 0.8 1.0 1.2 1.4 1.6
0.01
0.1
1
10
Instantaneous Forward Voltage (V)
Instantaneous Forward Current (A)
Pulse width = 300µs
1% Duty Cycle
TJ=25°C
17924
020 40 60 80 100
0.01
0.1
1
10
Percent of Rated Zener Voltage (%)
Instantaneous Reverse Current ( µA)
TJ=25°C
TJ= 100°C
17926
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Document Number 85782
Rev. 1.5, 03-Mar-04
VISHAY
SML4728 to SML4764A
Vishay Semiconductors
Package Dimensions in mm (Inches)
(0.080 MAX.)
2.03 MAX.
(0.216)
5.50 REF
(0.066 MIN.)
1.68 MIN.
(0.060 MIN.)
1.52 MIN.
14275
5.28 (0.208)
4.93 (0.194)
2.29 (0.090)
0.203 (0.008)
0.305 (0.012)
0.152 (0.006)
2.79 (0.110)
2.54 (0.100)
1.65 (0.065)
1.25 (0.049)
Mounting Pad Layout
technical drawings
according to DIN
specifications
Plastic case
JEDEC DO-214
similar to SMA
Cathode indicated
by a band
1.98 (0.078)
1.52 (0.060)
0.76 (0.030)
VISHAY
SML4728 to SML4764A
Document Number 85782
Rev. 1.5, 03-Mar-04
Vishay Semiconductors
www.vishay.com
5
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
