MOTOROLA
SEMICONDUCTOR
TECHNICAL DATA
Motorola TVS/Zener Device Data 5-1
600 Watt Peak Power Data Sheet
GENERAL DATA APPLICABLE TO ALL SERIES IN
THIS GROUP
Zener Transient Voltage Suppressors
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 Motorola’s
exclusive, cost-effective, highly reliable Surmetic package and is ideally suited for use in
communication systems, numerical controls, process controls, medical equipment,
business machines, power supplies and many other industrial/consumer applications.
Specification Features:
•Standard Zener Breakdown Voltage Range — 6.8 to 200 V
•Stand-off Voltage Range — 5 to 170 V
•Peak Power — 600 Watts @ 1 ms
•Maximum Clamp Voltage @ Peak Pulse Current
•Low Leakage < 5 µA Above 10 V
•UL Recognition
•Response Time Typically < 1 ns
Mechanical Characteristics:
CASE: V oid-free, transfer-molded, thermosetting plastic
FINISH: All external surfaces are corrosion resistant and leads are readily solderable
POLARITY: Cathode indicated by molded polarity notch. When operated in zener mode,
will be positive with respect to anode
MOUNTING POSITION: Any
LEADS: Modified L-Bend providing more contact area to bond pad
MAXIMUM CASE TEMPERATURE FOR SOLDERING PURPOSES: 260°C for 10 seconds
WAFER FAB LOCATION: Phoenix, Arizona
ASSEMBLY/TEST LOCATION: Seremban, Malaysia
MAXIMUM RATINGS
Rating Symbol Value Unit
Peak Power Dissipation (1)
@ TL ≤ 25°CPPK 600 Watts
Forward Surge Current (2)
@ TA = 25°CIFSM 100 Amps
Thermal Resistance from Junction to Lead (typical) R
q
JL 25 °C/W
Operating and Storage Temperature Range TJ, Tstg – 65 to +150 °C
NOTES: 1. Nonrepetitive current pulse per Figure 2 and derated above TA = 25°C per Figure 3.
NOTES: 2. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute maximum.
1SMB5.0AT3
SERIES
600 WATT
PEAK POWER
PLASTIC SURFACE MOUNT
ZENER OVERVOLTAGE
TRANSIENT
SUPPRESSORS
6.8–200 VOLTS
600 WATT PEAK POWER
CASE 403A
PLASTIC
REV 1
ABBREVIATIONS AND SYMBOLS
VRStand Off Voltage. Applied reverse voltage to assure a
non-conductive condition (See Note 1).
V(BR)min This is the minimum breakdown voltage the device will
exhibit and is used to assure that conduction does not
occur prior to this voltage level at 25°C.
VCMaximum Clamping Voltage. The maximum peak volt-
age appearing across the transient suppressor when
subjected to the peak pusle current in a one millisecond
time interval. The peak pulse voltages are the combina-
tion of voltage rise due to both the series resistance and
thermal rise.
IPP Peak Pulse Current — See Figure 2
PPPeak Pulse Power
IRReverse Leakage
GENERAL DATA — 600 WATT PEAK POWER
Motorola TVS/Zener Device Data
5-2
600 Watt Peak Power Data Sheet
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted).
Reverse
Breakdown Voltage*
Maximum
Peak
Pulse Current
Maximum
Re erse Leakage
Reverse
Stand-Off Volta
g
eVBR @ ITMaximum
Clam
p
in
g
Volta
g
ePulse Current
(
See Fi
g
ure 2
)
Reverse Leakage
@ V
R
Device
{{
Stand-Off
Voltage
VR
Volts (1) Volts
Min mA
Clamping
Voltage
VC @ Ipp
Volts
(See
Figure
2)
Ipp
{
Amps
@
VR
IR
µADevice
Marking
1SMB5.0AT3
1SMB6.0AT3
1SMB6.5AT3
1SMB7.0AT3
5.0
6.0
6.5
7.0
6.40
6.67
7.22
7.78
10
10
10
10
9.2
10.3
11.2
12.0
65.2
58.3
53.6
50.0
800
800
500
200
KE
KG
KK
KM
1SMB7.5AT3
1SMB8.0AT3
1SMB8.5AT3
1SMB9.0AT3
7.5
8.0
8.5
9.0
8.33
8.89
9.44
10.0
1.0
1.0
1.0
1.0
12.9
13.6
14.4
15.4
46.5
44.1
41.7
39.0
100
50
10
5.0
KP
KR
KT
KV
1SMB10AT3
1SMB11AT3
1SMB12AT3
1SMB13AT3
10
11
12
13
11.1
12.2
13.3
14.4
1.0
1.0
1.0
1.0
17.0
18.2
19.9
21.5
35.3
33.0
30.2
27.9
5.0
5.0
5.0
5.0
KX
KZ
LE
LG
1SMB14AT3
1SMB15AT3
1SMB16AT3
1SMB17AT3
14
15
16
17
15.6
16.7
17.8
18.9
1.0
1.0
1.0
1.0
23.2
24.4
26.0
27.6
25.8
24.0
23.1
21.7
5.0
5.0
5.0
5.0
LK
LM
LP
LR
1SMB18AT3
1SMB20AT3
1SMB22AT3
1SMB24AT3
18
20
22
24
20.0
22.2
24.4
26.7
1.0
1.0
1.0
1.0
29.2
32.4
35.5
38.9
20.5
18.5
16.9
15.4
5.0
5.0
5.0
5.0
LT
LV
LX
LZ
1SMB26AT3
1SMB28AT3
1SMB30AT3
1SMB33AT3
26
28
30
33
28.9
31.1
33.3
36.7
1.0
1.0
1.0
1.0
42.1
45.4
48.4
53.3
14.2
13.2
12.4
11.3
5.0
5.0
5.0
5.0
ME
MG
MK
MM
1SMB36AT3
1SMB40AT3
1SMB43AT3
1SMB45AT3
36
40
43
45
40.0
44.4
47.8
50.0
1.0
1.0
1.0
1.0
58.1
64.5
69.4
72.7
10.3
9.3
8.6
8.3
5.0
5.0
5.0
5.0
MP
MR
MT
MV
1SMB48AT3
1SMB51AT3
1SMB54AT3
1SMB58AT3
48
51
54
58
53.3
56.7
60.0
64.4
1.0
1.0
1.0
1.0
77.4
82.4
87.1
93.6
7.7
7.3
6.9
6.4
5.0
5.0
5.0
5.0
MX
MZ
NE
NG
1SMB60AT3
1SMB64AT3
1SMB70AT3
1SMB75AT3
60
64
70
75
66.7
71.1
77.8
83.3
1.0
1.0
1.0
1.0
96.8
103
113
121
6.2
5.8
5.3
4.9
5.0
5.0
5.0
5.0
NK
NM
NP
NR
1SMB78AT3
1SMB85AT3
1SMB90AT3
1SMB100AT3
78
85
90
100
86.7
94.4
100
111
1.0
1.0
1.0
1.0
126
137
146
162
4.7
4.4
4.1
3.7
5.0
5.0
5.0
5.0
NT
NV
NX
NZ
1SMB110AT3
1SMB120AT3
1SMB130AT3
1SMB150AT3
110
120
130
150
122
133
144
167
1.0
1.0
1.0
1.0
177
193
209
243
3.4
3.1
2.9
2.5
5.0
5.0
5.0
5.0
PE
PG
PK
PM
1SMB160AT3
1SMB170AT3 160
170 178
189 1.0
1.0 259
275 2.3
2.2 5.0
5.0 PP
PR
Note 1: A transient suppressor is normally selected according to the reverse ”Stand Off Voltage” (VR) which should be equal to or greater than the DC or continuous peak operating
voltage level.
* * VBR measured at pulse test current IT at an ambient temperaure of 25°C.
{{
Surge current waveform per Figure 2 and derate per Figure 3 of the General Data — 600 Watt at the beginning of this group.
{{
T3 suffix designates tape and reel of 2500 units.
GENERAL DATA — 600 WATT PEAK POWER
Motorola TVS/Zener Device Data 5-3
600 Watt Peak Power Data Sheet
P , PEAK POWER (kW)
P
NONREPETITIVE
PULSE WAVEFORM
SHOWN IN FIGURE 2
tP, PULSE WIDTH
1
10
100
0.1
µ
s1
µ
s10
µ
s 100
µ
s1 ms 10 ms
0.1
Figure 1. Pulse Rating
Curve
01234
0
50
100
t, TIME (ms)
VALUE (%)
HALF VALUE – IRSM
2
PULSE WIDTH (tP) IS DEFINED
AS THAT POINT WHERE THE PEAK
CURRENT DECAYS T O 50%
OF IRSM.
PEAK VALUE – IRSM
tr
tP
tr
≤
10
µ
s
Figure 2. Pulse Waveform
TYPICAL PROTECTION CIRCUIT
Vin VL
Zin
LOAD
Figure 3. Pulse Derating Curve
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ T
A= 25 C
°
100
80
60
40
20
00 25 50 75 100 125 150
TA, AMBIENT TEMPERATURE (
°
C)
120
140
160
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 4.
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 5. 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 ns and negligible inductance. However,
external inductive effects could produce unacceptable over-
shoot. 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 6. 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 6 appear to be in
error as the 10 ms pulse has a higher derating factor than the
10 µs pulse. However, when the derating factor for a given
pulse of Figure 6 is multiplied by the peak power value of
Figure 1 for the same pulse, the results follow the expected
trend.
GENERAL DATA — 600 WATT PEAK POWER
Motorola TVS/Zener Device Data
5-4
600 Watt Peak Power Data Sheet
VL
V
Vin
Vin (TRANSIENT) VL
td
V
Vin (TRANSIENT)
OVERSHOOT DUE TO
INDUCTIVE EFFECTS
tD = TIME DELAY DUE TO CAPACITIVE EFFECTt t
Figure 4. Figure 5.
Figure 6. Typical Derating Factor for Duty Cycle
DERATING FACTOR
1 ms
10
µ
s
1
0.7
0.5
0.3
0.05
0.1
0.2
0.01
0.02
0.03
0.07
100
µ
s
0.1 0.2 0.5 2 5 10 501 20 100
D, DUTY CYCLE (%)
PULSE WIDTH
10 ms
UL RECOGNITION
The entire series has
Underwriters Laboratory Recognition
for the classification of protectors (QVGV2) under the UL
standard for safety 497B and File #1 161 10. 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 V oltage-Withstand test, Discharge test and several
more.
Whereas, some competitors have only passed a flammabil-
ity test for the package material, we have been recognized for
much more to be included in their Protector category.
GENERAL DATA — 600 WATT PEAK POWER
Motorola TVS/Zener Device Data 5-5
600 Watt Peak Power Data Sheet
600 Watt Peak Power
MULTIPLE PACKAGE QUANTITY (MPQ)
REQUIREMENTS
Transient Voltage Suppressors — Surface Mounted
CASE 403A
PLASTIC
(Refer to Section 10 for Surface Mount, Thermal Data and Footprint Information.)
(Refer to Section 10 for more information on Packaging Specifications.)
Package Option
Tape and Reel 2.5K
Type No. Suffix
T3 (13 inch reel)
MPQ (Units)
0.160
0.130
0.075
0.077
0.0020
0.006
0.030
0.205
0.180
0.150
0.095
0.083
0.0060
0.012
0.050
0.220
B
A
S
C
D
KP
J
H
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. D DIMENSION SHALL BE MEASURED WITHIN
DIMENSION P.
MIN MINMAX MAX
INCHES MILLIMETERS
DIM
A
B
C
D
H
J
K
P
S
4.06
3.30
1.90
1.96
0.051
0.15
0.76
5.21
4.57
3.81
2.41
2.11
0.152
0.30
1.27
5.59
0.51 REF0.020 REF
SMB Footprint
mm
inches
0.085
2.159
0.108
2.743
0.089
2.261
