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:
Void-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
Peak Power Dissipation (1)
@ TL
≤
25°C
Forward Surge Current (2)
@ TA = 25°C
Thermal Resistance from Junction to Lead (typical)
Operating and Storage Temperature Range
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.
CASE 403A
PLASTIC
Symbol
PPK
IFSM
R
q
JL
TJ, Tstg
Value
600
100
25
– 65 to +150
Unit
Watts
Amps
°C/W
°C
REV 1
Motorola TVS/Zener Device Data
600 Watt Peak Power Data Sheet
5-1
GENERAL DATA — 600 WATT PEAK POWER
ELECTRICAL CHARACTERISTICS
(TA = 25°C unless otherwise noted).
Breakdown Voltage*
Reverse
Stand-Off Voltage
VR
Volts (1)
VBR @ IT
Volts
Min
mA
Maximum
Clamping Voltage
VC @ Ipp
Volts
Peak
Pulse Current
(See Figure 2)
Ipp
{
Amps
Maximum
Reverse
Re erse Leakage
@ VR
IR
µA
Device
{{
Device
Marking
1SMB5.0AT3
1SMB6.0AT3
1SMB6.5AT3
1SMB7.0AT3
1SMB7.5AT3
1SMB8.0AT3
1SMB8.5AT3
1SMB9.0AT3
1SMB10AT3
1SMB11AT3
1SMB12AT3
1SMB13AT3
1SMB14AT3
1SMB15AT3
1SMB16AT3
1SMB17AT3
1SMB18AT3
1SMB20AT3
1SMB22AT3
1SMB24AT3
1SMB26AT3
1SMB28AT3
1SMB30AT3
1SMB33AT3
1SMB36AT3
1SMB40AT3
1SMB43AT3
1SMB45AT3
1SMB48AT3
1SMB51AT3
1SMB54AT3
1SMB58AT3
1SMB60AT3
1SMB64AT3
1SMB70AT3
1SMB75AT3
1SMB78AT3
1SMB85AT3
1SMB90AT3
1SMB100AT3
1SMB110AT3
1SMB120AT3
1SMB130AT3
1SMB150AT3
1SMB160AT3
1SMB170AT3
5.0
6.0
6.5
7.0
7.5
8.0
8.5
9.0
10
11
12
13
14
15
16
17
18
20
22
24
26
28
30
33
36
40
43
45
48
51
54
58
60
64
70
75
78
85
90
100
110
120
130
150
160
170
6.40
6.67
7.22
7.78
8.33
8.89
9.44
10.0
11.1
12.2
13.3
14.4
15.6
16.7
17.8
18.9
20.0
22.2
24.4
26.7
28.9
31.1
33.3
36.7
40.0
44.4
47.8
50.0
53.3
56.7
60.0
64.4
66.7
71.1
77.8
83.3
86.7
94.4
100
111
122
133
144
167
178
189
10
10
10
10
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
9.2
10.3
11.2
12.0
12.9
13.6
14.4
15.4
17.0
18.2
19.9
21.5
23.2
24.4
26.0
27.6
29.2
32.4
35.5
38.9
42.1
45.4
48.4
53.3
58.1
64.5
69.4
72.7
77.4
82.4
87.1
93.6
96.8
103
113
121
126
137
146
162
177
193
209
243
259
275
65.2
58.3
53.6
50.0
46.5
44.1
41.7
39.0
35.3
33.0
30.2
27.9
25.8
24.0
23.1
21.7
20.5
18.5
16.9
15.4
14.2
13.2
12.4
11.3
10.3
9.3
8.6
8.3
7.7
7.3
6.9
6.4
6.2
5.8
5.3
4.9
4.7
4.4
4.1
3.7
3.4
3.1
2.9
2.5
2.3
2.2
800
800
500
200
100
50
10
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
KE
KG
KK
KM
KP
KR
KT
KV
KX
KZ
LE
LG
LK
LM
LP
LR
LT
LV
LX
LZ
ME
MG
MK
MM
MP
MR
MT
MV
MX
MZ
NE
NG
NK
NM
NP
NR
NT
NV
NX
NZ
PE
PG
PK
PM
PP
PR
{{
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.
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.
ABBREVIATIONS AND SYMBOLS
VR
Stand 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.
VC
Maximum Clamping Voltage. The maximum peak volt-
age appearing across the transient suppressor when
IPP
PP
IR
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.
Peak Pulse Current — See Figure 2
Peak Pulse Power
Reverse Leakage
600 Watt Peak Power Data Sheet
5-2
Motorola TVS/Zener Device Data
GENERAL DATA — 600 WATT PEAK POWER
100
NONREPETITIVE
PULSE WAVEFORM
SHOWN IN FIGURE 2
10
100
VALUE (%)
PEAK VALUE – IRSM
tr
PULSE WIDTH (tP) IS DEFINED
AS THAT POINT WHERE THE PEAK
CURRENT DECAYS TO 50%
OF IRSM.
tr
≤
10
µs
PP, PEAK POWER (kW)
1
50
tP
I
HALF VALUE – RSM
2
0.1
0.1
µ
s
1
µ
s
10
µ
s
100
µ
s
1 ms
10 ms
0
0
1
2
t, TIME (ms)
3
4
tP, PULSE WIDTH
Figure 1. Pulse Rating
Curve
160
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ T = 25
°
C
A
140
120
100
80
60
40
20
0
0
25
50
75
100
125
150
Vin
Zin
Figure 2. Pulse Waveform
TYPICAL PROTECTION CIRCUIT
LOAD
VL
TA, AMBIENT TEMPERATURE (°C)
Figure 3. Pulse Derating Curve
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
Motorola TVS/Zener Device Data
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.
600 Watt Peak Power Data Sheet
5-3
GENERAL DATA — 600 WATT PEAK POWER
Vin (TRANSIENT)
VL
VL
V
Vin (TRANSIENT)
V
OVERSHOOT DUE TO
INDUCTIVE EFFECTS
Vin
td
tD = TIME DELAY DUE TO CAPACITIVE EFFECT
t
t
Figure 4.
Figure 5.
1
0.7
0.5
0.3
DERATING FACTOR
0.2
0.1
0.07
0.05
0.03
0.02
10
µs
0.01
0.1
0.2
0.5
1
2
5
10
D, DUTY CYCLE (%)
20
50
100
PULSE WIDTH
10 ms
1 ms
100
µs
Figure 6. Typical Derating Factor for Duty Cycle
UL RECOGNITION
The entire series has
Underwriters Laboratory Recognition
for the classification of protectors (QVGV2) under the UL
standard for safety 497B and File #116110. 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 flammabil-
ity test for the package material, we have been recognized for
much more to be included in their Protector category.
600 Watt Peak Power Data Sheet
5-4
Motorola TVS/Zener Device Data
GENERAL DATA — 600 WATT PEAK POWER
Transient Voltage Suppressors — Surface Mounted
600 Watt Peak Power
0.089
2.261
S
A
0.108
2.743
D
B
0.085
2.159
inches
mm
SMB Footprint
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. D DIMENSION SHALL BE MEASURED WITHIN
DIMENSION P.
INCHES
MIN
MAX
0.160 0.180
0.130 0.150
0.075 0.095
0.077 0.083
0.0020 0.0060
0.006 0.012
0.030 0.050
0.020 REF
0.205 0.220
MILLIMETERS
MIN
MAX
4.06
4.57
3.30
3.81
1.90
2.41
1.96
2.11
0.051 0.152
0.15
0.30
0.76
1.27
0.51 REF
5.21
5.59
C
K
P
J
H
DIM
A
B
C
D
H
J
K
P
S
CASE 403A
PLASTIC
(Refer to Section 10 for Surface Mount, Thermal Data and Footprint Information.)
MULTIPLE PACKAGE QUANTITY (MPQ)
REQUIREMENTS
Package Option
Tape and Reel
Type No. Suffix
T3 (13 inch reel)
MPQ (Units)
2.5K
(Refer to Section 10 for more information on Packaging Specifications.)
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