1SMB140AT3 (ON Semiconductor)
(1SMBxxxAT3) 600 Watt Peak Power Zener Transient Voltage Suppressors

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1SMB5.0AT3 Series
600 Watt Peak Power Zener
Transient Voltage
Suppressors
Unidirectional*
The SMB series is designed to protect voltage sensitive
components from high voltage, high energy transients. They have
excellent clamping capability, high surge capability, low zener
impedance and fast response time. The SMB series is supplied in
ON Semiconductor’s exclusive, cost-effective, highly reliable
Surmetict package and is ideally suited for use in communication
systems, automotive, numerical controls, process controls, medical
equipment, business machines, power supplies and many other
industrial/consumer applications.
Features
Working Peak Reverse Voltage Range − 5.0 V to 170 V
Standard Zener Breakdown Voltage Range − 6.7 V to 199 V
Peak Power − 600 W @ 1.0 ms
ESD Rating of Class 3 (>16 kV) per Human Body Model
Maximum Clamp Voltage @ Peak Pulse Current
Low Leakage < 5.0 mA Above 10 V
UL 497B for Isolated Loop Circuit Protection
Response Time is Typically < 1.0 ns
Pb−Free Packages are Available
Mechanical Characteristics
CASE: Void-free, transfer-molded, thermosetting plastic
FINISH: All external surfaces are corrosion resistant and leads are
readily solderable
MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES:
260°C for 10 Seconds
LEADS: Modified L−Bend providing more contact area to bond pads
POLARITY: Cathode indicated by polarity band
MOUNTING POSITION: Any
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PLASTIC SURFACE MOUNT
ZENER OVERVOLTAGE
TRANSIENT SUPPRESSORS
5.0 V − 170 V,
600 W PEAK POWER
Cathode
Anode
SMB
CASE 403A
PLASTIC
MARKING DIAGRAM
AYWW
xx G
G
A = Assembly Location
Y = Year
WW = Work Week
xx = Device Code (Refer to page 3)
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
Package
Shipping
1SMBxxxAT3
SMB
2500/Tape & Reel
1SMBxxxAT3G
SMB
2500/Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
DEVICE MARKING INFORMATION
See specific marking information in the device marking
column of the Electrical Characteristics table on page 3 of
this data sheet.
© Semiconductor Components Industries, LLC, 2007
February, 2007 − Rev. 10
1
Publication Order Number:
1SMB5.0AT3/D


1SMB140AT3 (ON Semiconductor)
(1SMBxxxAT3) 600 Watt Peak Power Zener Transient Voltage Suppressors

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1SMB5.0AT3 Series
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Peak Power Dissipation (Note 1) @ TL = 25°C, Pulse Width = 1 ms
PPK 600 W
DC Power Dissipation @ TL = 75°C
Measured Zero Lead Length (Note 2)
Derate Above 75°C
Thermal Resistance from Junction−to−Lead
PD
RqJL
3.0 W
40 mW/°C
25 °C/W
DC Power Dissipation (Note 3) @ TA = 25°C
Derate Above 25°C
Thermal Resistance from Junction−to−Ambient
PD
RqJA
0.55 W
4.4 mW/°C
226 °C/W
Forward Surge Current (Note 4) @ TA = 25°C
IFSM 100 A
Operating and Storage Temperature Range
TJ, Tstg
−65 to +150
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. 10 X 1000 ms, non−repetitive.
2. 1 in square copper pad, FR−4 board.
3. FR−4 board, using ON Semiconductor minimum recommended footprint, as shown in 403A case outline dimensions spec.
4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum.
ELECTRICAL CHARACTERISTICS (TA = 25°C unless
otherwise noted, VF = 3.5 V Max. @ IF (Note 5) = 30 A)
Symbol
Parameter
IPP Maximum Reverse Peak Pulse Current
VC Clamping Voltage @ IPP
VRWM Working Peak Reverse Voltage
IR Maximum Reverse Leakage Current @ VRWM
VBR Breakdown Voltage @ IT
IT Test Current
IF Forward Current
VF Forward Voltage @ IF
5. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms,
non−repetitive duty cycle.
I
IF
VC VBR VRWM
IIRT VF
V
IPP
Uni−Directional TVS
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1SMB140AT3 (ON Semiconductor)
(1SMBxxxAT3) 600 Watt Peak Power Zener Transient Voltage Suppressors

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1SMB5.0AT3 Series
ELECTRICAL CHARACTERISTICS (Devices listed in bold, italic are ON Semiconductor Preferred devices.)
Device*
Device
Marking
VRWM
(Note 6)
V
IR @ VRWM
mA
Breakdown Voltage
VBR (Note 7) Volts
Min Nom Max
@ IT
mA
VC @ IPP (Note 8)
VC IPP
VA
Ctyp
(Note 9)
pF
1SMB5.0AT3, G
1SMB6.0AT3, G
1SMB6.5AT3, G
1SMB7.0AT3, G
KE
KG
KK
KM
5.0
6.0
6.5
7.0
800 6.40 6.7 7.0 10 9.2 65.2 2700
800
6.67 7.02 7.37
10
10.3
58.3
2300
500
7.22 7.6 7.98
10
11.2
53.6
2140
500
7.78 8.19
8.6
10
12.0
50.0
2005
1SMB7.5AT3, G
1SMB8.0AT3, G
1SMB8.5AT3, G
1SMB9.0AT3, G
KP
KR
KT
KV
7.5
8.0
8.5
9.0
100
8.33 8.77 9.21
1.0
12.9
46.5
1890
50
8.89 9.36 9.83
1.0
13.6
44.1
1780
10
9.44 9.92 10.4
1.0
14.4
41.7
1690
5.0
10.0 10.55 11.1
1.0
15.4
39.0
1605
1SMB10AT3, G
1SMB11AT3, G
1SMB12AT3, G
1SMB13AT3, G
KX
KZ
LE
LG
10
11
12
13
5.0
11.1 11.7 12.3
1.0
17.0
35.3
1460
5.0
12.2 12.85 13.5
1.0
18.2
33.0
1345
5.0
13.3 14 14.7 1.0
19.9
30.2
1245
5.0
14.4 15.15 15.9
1.0
21.5
27.9
1160
1SMB14AT3, G
1SMB15AT3, G
1SMB16AT3, G
1SMB17AT3, G
LK
LM
LP
LR
14
15
16
17
5.0
15.6 16.4 17.2
1.0
23.2
25.8
1085
5.0
16.7 17.6 18.5
1.0
24.4
24.0
1020
5.0
17.8 18.75 19.7
1.0
26.0
23.1
965
5.0
18.9 19.9 20.9
1.0
27.6
21.7
915
1SMB18AT3, G
1SMB20AT3, G
1SMB22AT3, G
1SMB24AT3, G
LT
LV
LX
LZ
18
20
22
24
5.0
20.0 21.05 22.1
1.0
29.2
20.5
870
5.0
22.2 23.35 24.5
1.0
32.4
18.5
790
5.0
24.4 25.65 26.9
1.0
35.5
16.9
730
5.0
26.7 28.1 29.5
1.0
38.9
15.4
675
1SMB26AT3, G
1SMB28AT3, G
1SMB30AT3, G
1SMB33AT3, G
ME
MG
MK
MM
26
28
30
33
5.0
28.9 30.4 31.9
1.0
42.1
14.2
630
5.0
31.1 32.75 34.4
1.0
45.4
13.2
590
5.0
33.3 35.05 36.8
1.0
48.4
12.4
555
5.0
36.7 38.65 40.6
1.0
53.3
11.3
510
1SMB36AT3, G
1SMB40AT3, G
1SMB43AT3, G
1SMB45AT3, G
MP
MR
MT
MV
36
40
43
45
5.0
40.0 42.1 44.2
1.0
58.1
10.3
470
5.0
44.4 46.75 49.1
1.0
64.5
9.3
430
5.0
47.8 50.3 52.8
1.0
69.4
8.6
400
5.0
50.0 52.65 55.3
1.0
72.7
8.3
385
1SMB48AT3, G
1SMB51AT3, G
1SMB54AT3, G
1SMB58AT3, G
MX
MZ
NE
NG
48
51
54
58
5.0
53.3 56.1 58.9
1.0
77.4
7.7
365
5.0
56.7 59.7 62.7
1.0
82.4
7.3
345
5.0
60.0 63.15 66.3
1.0
87.1
6.9
330
5.0
64.4 67.8 71.2
1.0
93.6
6.4
310
1SMB60AT3, G
1SMB64AT3, G
1SMB70AT3, G
1SMB75AT3, G
NK
NM
NP
NR
60
64
70
75
5.0
66.7 70.2 73.7
1.0
96.8
6.2
300
5.0
71.1 74.85 78.6
1.0
103
5.8
280
5.0
77.8 81.9
86
1.0
113
5.3
260
5.0
83.3 87.7 92.1
1.0
121
4.9
245
1SMB85AT3, G
1SMB90AT3, G
1SMB100AT3, G
NV
NX
NZ
85
90
100
55.0
94.4 99.2 104
1.0
137
4.4
220
5.0
100 105.5 111
1.0
146
4.1
210
5.0
111 117 123 1.0
162
3.7
190
1SMB110AT3, G
1SMB120AT3, G
1SMB130AT3, G
1SMB150AT3, G
PE
PG
PK
PM
110
120
130
150
5.0
122 128.5 135
1.0
177
3.4
175
5.0
133 140 147 1.0
193
3.1
160
5.0
144 151.5 159
1.0
209
2.9
150
5.0
167 176 185 1.0
243
2.5
135
1SMB160AT3, G
1SMB170AT3, G
PP
PR
160
170
5.0
178 187.5 197
1.0
259
2.3
125
5.0
189 199 209 1.0
275
2.2
120
6. A transient suppressor is normally selected according to the working peak reverse voltage (VRWM), which should be equal to or greater than
the DC or continuous peak operating voltage level.
7. VBR measured at pulse test current IT at an ambient temperature of 25°C.
8. Surge current waveform per Figure 2 and derate per Figure 4 of the General Data − 600 W at the beginning of this group.
9. Bias Voltage = 0 V, F = 1 MHz, TJ = 25°C
†Please see 1SMB10CAT3 to 1SMB78CAT3 for Bidirectional devices.
* The “G” suffix indicates Pb−Free package available.
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1SMB140AT3 (ON Semiconductor)
(1SMBxxxAT3) 600 Watt Peak Power Zener Transient Voltage Suppressors

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1SMB5.0AT3 Series
100
NONREPETITIVE
PULSE WAVEFORM
tr 10 ms
PULSE WIDTH (tP) IS DEFINED AS
THAT POINT WHERE THE PEAK
CURRENT DECAYS TO 50% OF
SHOWN IN FIGURE 2
100
IPP.
10 PEAK VALUE − IPP
1
0.1
0.1 ms
1 ms
10 ms
100 ms
1 ms
tP, PULSE WIDTH
Figure 1. Pulse Rating Curve
10 ms
50
HALF
VALUE
IPP
2
tP
0
01 2 34
t, TIME (ms)
Figure 2. Pulse Waveform
5
160
140
120
100
80
60
40
20
0
0 25 50 75 100 125
TA, AMBIENT TEMPERATURE (°C)
Figure 3. Pulse Derating Curve
10,000
1000
100
10
1SMB5.0AT3G
1SMB10AT3G
TJ = 25°C
f = 1 MHz
1SMB48AT3G
1SMB170AT3G
1
150 1
10 100
BIAS VOLTAGE (VOLTS)
1000
Figure 4. Typical Junction Capacitance vs.
Bias Voltage
Zin
Vin
LOAD
VL
Figure 5. Typical Protection Circuit
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(1SMBxxxAT3) 600 Watt Peak Power Zener Transient Voltage Suppressors

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1SMB5.0AT3 Series
APPLICATION NOTES
RESPONSE TIME
In most applications, the transient suppressor device is
placed in parallel with the equipment or component to be
protected. In this situation, there is a time delay associated
with the capacitance of the device and an overshoot
condition associated with the inductance of the device and
the inductance of the connection method. The capacitive
effect is of minor importance in the parallel protection
scheme because it only produces a time delay in the
transition from the operating voltage to the clamp voltage as
shown in Figure 6.
The inductive effects in the device are due to actual
turn-on time (time required for the device to go from zero
current to full current) and lead inductance. This inductive
effect produces an overshoot in the voltage across the
equipment or component being protected as shown in
Figure 7. Minimizing this overshoot is very important in the
application, since the main purpose for adding a transient
suppressor is to clamp voltage spikes. The SMB series have
a very good response time, typically < 1.0 ns and negligible
inductance. However, external inductive effects could
produce unacceptable overshoot. Proper circuit layout,
minimum lead lengths and placing the suppressor device as
close as possible to the equipment or components to be
protected will minimize this overshoot.
Some input impedance represented by Zin is essential to
prevent overstress of the protection device. This impedance
should be as high as possible, without restricting the circuit
operation.
DUTY CYCLE DERATING
The data of Figure 1 applies for non-repetitive conditions
and at a lead temperature of 25°C. If the duty cycle increases,
the peak power must be reduced as indicated by the curves
of Figure 8. Average power must be derated as the lead or
ambient temperature rises above 25°C. The average power
derating curve normally given on data sheets may be
normalized and used for this purpose.
At first glance the derating curves of Figure 8 appear to be
in error as the 10 ms pulse has a higher derating factor than
the 10 ms pulse. However, when the derating factor for a
given pulse of Figure 8 is multiplied by the peak power
value of Figure 1 for the same pulse, the results follow the
expected trend.
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(1SMBxxxAT3) 600 Watt Peak Power Zener Transient Voltage Suppressors

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1SMB5.0AT3 Series
OVERSHOOT DUE TO
V
Vin (TRANSIENT)
V INDUCTIVE EFFECTS
VL
Vin
td
tD = TIME DELAY DUE TO CAPACITIVE EFFECT
t
Figure 6.
Figure 7.
1
0.7
0.5
0.3
0.2
0.1
0.07
0.05
0.03
0.02
0.01
0.1 0.2
PULSE WIDTH
10 ms
1 ms
100 ms
10 ms
0.5 1 2
5 10 20
D, DUTY CYCLE (%)
50 100
Figure 8. Typical Derating Factor for Duty Cycle
Vin (TRANSIENT)
VL
t
UL RECOGNITION
The entire series has Underwriters Laboratory
Recognition for the classification of protectors (QVGV2)
under the UL standard for safety 497B and File #E210057.
Many competitors only have one or two devices recognized
or have recognition in a non-protective category. Some
competitors have no recognition at all. With the UL497B
recognition, our parts successfully passed several tests
including Strike Voltage Breakdown test, Endurance
Conditioning, Temperature test, Dielectric
Voltage-Withstand test, Discharge test and several more.
Whereas, some competitors have only passed a
flammability test for the package material, we have been
recognized for much more to be included in their Protector
category.
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1SMB140AT3 (ON Semiconductor)
(1SMBxxxAT3) 600 Watt Peak Power Zener Transient Voltage Suppressors

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HE
E
L
1SMB5.0AT3 Series
PACKAGE DIMENSIONS
bD
L1 c
SMB
CASE 403A−03
ISSUE F
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. D DIMENSION SHALL BE MEASURED WITHIN DIMENSION P.
MILLIMETERS
DIM MIN NOM MAX
A 1.90
2.13
2.45
A1 0.05
0.10
0.20
b 1.96 2.03 2.20
c 0.15 0.23 0.31
D 3.30
3.56
3.95
E 4.06
4.32
4.60
H E 5.21
5.44
5.60
L 0.76 1.02 1.60
L1 0.51 REF
MIN
0.075
0.002
0.077
0.006
0.130
0.160
0.205
0.030
INCHES
NOM
0.084
0.004
0.080
0.009
0.140
0.170
0.214
0.040
0.020 REF
MAX
0.096
0.008
0.087
0.012
0.156
0.181
0.220
0.063
A
A1
SOLDERING FOOTPRINT*
2.261
0.089
2.743
0.108
2.159
0.085
ǒ ǓSCALE 8:1
mm
inches
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
SURMETIC is a trademark of Semiconductor Components Industries, LLC.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice
to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability
arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages.
“Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All
operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights
nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should
Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Literature Distribution Center for ON Semiconductor
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Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada
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Europe, Middle East and Africa Technical Support:
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For additional information, please contact your local
Sales Representative
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