VISHAY
SML4728 to SML4764A
Vishay Semiconductors
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 %.
15811
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
T
amb
= 25 °C, unless otherwise specified
Parameter
Power dissipation
Test condition
T
L
= 75 °C
Symbol
P
tot
Value
1.0
Unit
W
Thermal Characteristics
T
amb
= 25 °C, unless otherwise specified
Parameter
Maximum junction temperature
Storage temperature range
Test condition
Symbol
T
j
T
S
Value
150
- 65 to + 150
Unit
°C
°C
Document Number 85782
Rev. 1.5, 03-Mar-04
www.vishay.com
1
SML4728 to SML4764A
Vishay Semiconductors
Electrical Characteristics
Partnumber
Device
Marking
Code
Nominal
Zener
Voltage
V
Z1)
@ I
ZT
V
SML4728
SML4729
SML4730
SML4731
SML4732
SML4733
SML4734
SML4735
SML4736
SML4737
SML4738
SML4739
SML4740
SML4741
SML4742
SML4743
SML4744
SML4745
SML4746
SML4747
SML4748
SML4749
SML4750
SML4751
SML4752
SML4753
SML4754
SML4755
SML4756
SML4757
SML4758
SML4759
SML4760
SML4761
SML4762
SML4763
SML4764
1)
2)
VISHAY
Test
Current
I
ZT
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
7.5
7
6.5
6
5.5
5
4.5
4
3.7
3.3
3
2.8
2.5
Maximum Dynamic
ImpedanceResistance
Z
ZT
@ I
ZT
Ω
10
10
9
9
8
7
5
2
3.5
4
4.5
5
7
8
9
10
14
16
20
22
23
25
35
40
45
50
60
70
80
95
110
125
150
175
200
250
350
Z
ZK
@ I
ZK
Ω
400
400
400
400
500
550
600
700
700
700
700
700
700
700
700
700
700
700
750
750
750
750
750
1000
1000
1000
1000
1500
1500
1500
2000
2000
2000
2000
3000
3000
3000
I
ZK
mA
1
1
1
1
1
1
1
1
1
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 DC Reverse
Leakage Current
I
R
µA
100
100
50
10
10
10
10
10
10
10
10
10
10
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
V
R
V
1
1
1
1
1
1
2
3
4
5
6
7
7.6
8.4
9.1
9.9
11.4
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
62.2
69.2
76
Maximum
Surge
Current
I
RM2)
mApk
1380
1260
1190
1070
970
890
810
730
660
605
550
500
454
414
380
344
305
285
250
225
205
190
170
150
135
125
115
110
95
90
80
70
65
60
55
50
45
3P3
3P6
3P9
4P3
4P7
5P1
5P6
6P2
6P8
7P5
8P2
9P1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
56
62
68
75
82
91
100
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
33
36
39
43
47
51
56
62
68
75
82
91
100
Based on dc- measurement at thermal equilibrium
Surge current is a non-repetitive, 8.3 ms pulse width square wave or equivalent sine-wave superimposed on I
ZT
per JEDEC Method
www.vishay.com
2
Document Number 85782
Rev. 1.5, 03-Mar-04
VISHAY
SML4728 to SML4764A
Vishay Semiconductors
Typical Characteristics
(T
amb
= 25
°C
unless otherwise specified)
PM(AV) Average Power Dissipation (W)
,
0.75
60 Hz
Resistive or
Inductive Load
Instantaneous Forward Current (A)
1.0
10
1
0.5
0.1
Pulse width = 300µs
1% Duty Cycle
TJ = 25°C
0.4
1.4
0.8
0.6
1.2
1.0
Instantaneous Forward Voltage (V)
1.6
0.25
P.C.B. Mounted on
0.31 x 0.31 x 0.08" (8 x 8 x 2mm)
copper areas pads
25
100
125
150
75
50
Terminals Temperature (
°C)
175
0
0.01
17923
17924
Fig. 1 Maximum Continuous Power Dissipation
Fig. 4 Typical Instantaneous Forward Characteristics for
SML4763
TJ = 25°C
VZ = 91V
VZ = 56V
VZ = 30V
100
Instantaneous Reverse Current ( µA)
ZZ , Dynamic Zener Impedance (Ω)
1,000
10
1
TJ = 100°C
10
0.1
VZ = 6.2V
1
0.5
10
100
IZT, Zener Test Current (mA)
500
TJ = 25°C
0.01
0
20
80
60
40
Percent of Rated Zener Voltage (%)
100
17925
17926
Fig. 2 Typical Zener Impedance
Fig. 5 Typical Reverse Characteristics
Θ
VZ, Temperature Coefficient (mV/ °C)
110
90
70
50
30
10
0
0
10 20 30 40 50 60 70 80 90 100
VZ, Zener Voltage (V)
Tested at rated IZT
17927
Fig. 3 Typical Temperature Coefficients
Document Number 85782
Rev. 1.5, 03-Mar-04
www.vishay.com
3
SML4728 to SML4764A
Vishay Semiconductors
Package Dimensions in mm (Inches)
VISHAY
2.29 (0.090)
1.98 (0.078)
technical drawings
according to DIN
specifications
2.79 (0.110)
2.54 (0.100)
1.65 (0.065)
1.25 (0.049)
0.203 (0.008)
Plastic case
JEDEC DO-214
similar to SMA
Cathode indicated
by a band
0.305 (0.012)
0.152 (0.006)
5.28 (0.208)
4.93 (0.194)
1.52 (0.060)
0.76 (0.030)
Mounting Pad Layout
2.03 MAX.
(0.080 MAX.)
1.68 MIN.
(0.066 MIN.)
1.52 MIN.
(0.060 MIN.)
14275
5.50 REF
(0.216)
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4
Document Number 85782
Rev. 1.5, 03-Mar-04
VISHAY
SML4728 to SML4764A
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
Document Number 85782
Rev. 1.5, 03-Mar-04
www.vishay.com
5
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