SM15T SERIES
T
RANS
Z
ORB
TM SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR
Breakdown Voltage - 6.8 to 220 Volts Peak Pulse Power - 1500 Watts
FEATURES
For surface mounted applications in order to
optimize board space
Low profile package
Built-in strain relief
Glass passivated junction
Low inductance
Excellent clamping capability
Repetition Rate (duty cycle): 0.05%
Fast reponse time: typically less than 1ps from 0 volts to
V
BR
min.
Typical I
D
less than 1A above 10V
High temperature soldering: 250C/10 seconds
at terminals
Plastic package has Underwriters Laboratory
Flammability Classification 94V-0
MECHANICAL DATA
Case: JEDEC DO-214AB (SMC) molded plastic over
passivated junction
Terminals: Solder plated solderable per MIL-STD-750,
Method 2026
Polarity: For uni-directional types: Color band
denotes positive end (cathode)
Standard Packaging: 12mm tape (EIA STD RS-481)
Weight: 0.003 ounces, 0.093 gram
MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS
Ratings at 25C ambient temperature unless otherwise specified
SYMBOLS
VALUE
UNIT
Peak Pulse Power Dissipation on 10/1000s
waveform
(NOTES 1, 2, Fig. 1)
P
PPM
Minimum 1500
Watts
Peak Pulse Current on 10/1000s
waveform
(NOTE 1, Fig. 3)
I
PPM
See Table 1
Amps
Power Dissipation on Infinite Heatsink, T
A
=50
C
P
M(AV)
6.5
Watts
Peak Forward Surge Current, 10ms Single Half Sine-wave,
I
FSM
200
Amps
Undirectional Only
Max. Junction Temperature
T
J
150
C
Storage Temperature Range
T
STG
-65 to +175
C
Thermal Resistance Junction to Ambient Air
(NOTE 2)
R
JA
75
C/W
Thermal Resistance Junction to Leads
R
JL
15
C/W
NOTES:
(1) Non-repetitive current pulse, per Fig. 3 and derated above T
A
=25C per Fig. 2
(2) Mounted on 5.0mm
2
(.013mm thick) land areas.
(3) Measured on 8.3ms single half sine-wave or equivalent squarewave, duty cycle 4 pulses per minute maximum.
1/21/99
0.006 (0.152)
0.012 (0.305)
0.030 (0.76)
0.060 (1.52)
0.008 (0.203)
0.305 (7.75)
0.320 (8.13)
0.260 (6.60)
0.280 (7.11)
0.079 (2.06)
0.103 (2.62)
0.220 (5.59)
0.245 (6.22)
0.126 (3.20)
0.114 (2.90)
MAX.
DO-214AB
Dimensions in inches and (millimeters)
NEW PRODUCT
NEW PRODUCT
NEW PRODUCT
ELECTRICAL CHARACTERISTICS RATINGS at (T
A
=25C unless otherwise noted)
SM15T6V8A
GDE7
GDE7
5.80
1000
6.45
7.14
10
10.5
143
13.4
746
5.7
SM15T7V5A
GDK7
BDK7
6.40
500
7.13
7.88
10
11.3
132
14.5
690
6.1
SM15T10A
GDT7
BDT7
8.55
10.0
9.50
10.5
1.0
14.5
103
18.6
538
7.3
SM15T12A
GDX7
BDX7
10.2
5.00
11.4
12.6
1.0
16.7
90.0
21.7
461
7.8
SM15T15A
GEG7
GEG7
12.8
5.00
14.3
15.8
1.0
21.2
71.0
27.2
368
8.4
SM15T18A
GEM7
BEM7
15.3
5.00
17.1
18.9
1.0
25.2
59.5
32.5
308
8.8
SM15T22A
GET7
BET7
18.8
5.00
20.9
23.1
1.0
30.6
49.0
39.3
254
9.2
SM15T24A
GEV7
GEV7
20.5
5.00
22.8
25.2
1.0
33.2
45.0
42.8
234
9.4
SM15T27A
GEX7
BEX7
23.1
5.00
25.7
28.4
1.0
37.5
40.0
48.3
207
9.6
SM15T30A
GFE7
BFE7
25.6
5.00
28.5
31.5
1.0
41.5
36.0
53.5
187
9.7
SM15T33A
GFG7
GFG7
28.2
5.00
31.4
34.7
1.0
45.7
33.0
59.0
169
9.8
SM15T36A
GFK7
BFK7
30.8
5.00
34.2
37.8
1.0
49.9
30.0
64.3
156
9.9
SM15T39A
GFM7
BFM7
33.3
5.00
37.1
41.0
1.0
53.9
28.0
69.7
143
10.0
SM15T68A
GGG7
GGG7
58.1
5.00
64.6
71.4
1.0
92.0
16.3
121
83
10.4
SM15T100A
GGV7
GGV7
85.5
5.00
95.0
105
1.0
137
11.0
178
56
10.6
SM15T150A
GHK7
GHK7
128
5.00
143
158
1.0
207
7.20
265
38
10.8
SM15T200A
GHR7
GHR7
171
5.00
190
210
1.0
274
5.50
353
28
10.8
SM15T220A
GHR8
GHR8
188
5.00
209
231
1.0
328
4.60
388
26
10.8
NOTES:
(1) For bi-directional devices add "C" for 10% and "CA" for 5% tolerance of V
BR
(2) V
BR
measured after I
T
applied for 300s square wave pulse
(3) For bipolar devices with V
R
=10 Volts or under, the I
T
limit is doubled
APPLICATION NOTES
A 1500W (SMC) device is normally selected when the threat of transients is from lightning induced transients, conducted via external leads or I/O lines. It is also used to
protect against switching transients induced by large coils or industrial motors. Source impedance at component level in a system is usually high enough to limit the current
within the peak pulse current (I
PP
) rating of this series. In an overstress condition, the failure mode is a short circuit.
RECOMMENDED PAD SIZES
The pad dimensions should be 0.010" (0.25mm) longer than the contact size, in the lead axis. This allows a solder fillet to form, see figure below. Contact factory for
soldering methods
Type
(1)
Device
Marking Code
Uni
Bi
Standoff
Voltage
V
RM
(Volts)
Leakage
Current
(3)
I
RM
@ V
RM
(
A)
Breakdown Voltage
V
BR
@ I
T
(2)
(Volts)
Min
Max
Test
Current
I
T
(mA)
Clamping Voltage
V
C
@ I
PP
10/1000
s
(Volts)
(Amps)
T
Max
10
-4
/
C
Clamping Voltage
V
C
@ I
PP
8/20
s
(Volts)
(Amps)
0.190 (4.83)
0.125 (3.17)
0.070 (1.78)
FIG. 1 - PEAK PULSE POWER RATING CURVE
P
PPM
, PEAK PULSE POWER, kW
td, PULSE WIDTH, sec.
T
A
, AMBIENT TEMPERATURE, C
FIG. 4 - TYPICAL JUNCTION CAPACITANCE
UNIDIRECTIONAL
FIG. 3 - PULSE WAVEFORM
t, TIME, ms
V
WM
, REVERSE STAND-OFF VOLTAGE,
VOLTS
V
WM,
STAND-OFF VOLTAGE, VOLTS
NUMBER OF CYCLES AT 60 H
Z
I
PPM
PEAK PULSE CURRENT
, % I
RSM
PEAK PULSE POWER (P
PP
) or CURRENT
(I
PP
)
DERA
TING IN PERCENT
AGE, %
C
J
, CAP
ACIT
ANCE, pF
C
J
, JUNCTION CAP
ACIT
ANCE, pF
I
FSM
, PEAK FOR
W
ARD SURGE CURRENT
,
AMPERES
NON-REPETITIVE
PULSE WAVEFORM
SHOWN in FIG. 3
T
A
=25C
T
J
=25C PULSE WIDTH (td)
is DEFINED as the POINT
WHERE the PEAK
CURRENT DECAYS
to 50% of I
PPM
tr=10
sec.
MEASURED at
ZERO BIAS
V
R,
MEASURED
at STAND-OFF
VOLTAGE, V
WM
8.3ms SINGLE HALF SINE-WAVE
(JEDEC Method)
UNIDIRECTIONAL ONLY
HALF VALUE - I
PP
2
10/1000
sec. WAVEFORM
as DEFINED by R.E.A.
FIG. 6 - MAXIMUM NON-REPETITIVE PEAK FORWARD
SURGE CURRENT
PEAK VALUE
I
PPM
FIG. 5 - TYPICAL JUNCTION CAPACITANCE
BIDIRECTIONAL
FIG. 2 - PULSE DERATING CURVE
T
J
=25C
f=1.0 MH
Z
Vsig=50mVp-p
T
J
=25C
f=1.0 MH
Z
Vsig=50mVp-p
0.31 X 0.31" (8.0 X 8.0mm) COPPER PAD AREAS
MEASURED at
ZERO BIAS
MEASURED at
STAND-OFF
VOLTAGE, V
WM
td
RATINGS AND CHARACTERISTIC CURVES SM15T SERIES
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