SM15T Series
Vishay Semiconductors
formerly General Semiconductor
Document Number 88380 www.vishay.com
09-Feb-04 1
Surface Mount TRANSZORB®
Transient Voltage Suppressors
Breakdown Voltage 6.8 to 220V
Peak Pulse Power 1500W
Devices for Bidirectional Applications
For bi-directional devices, use suffix CA (e.g. SM15T10CA). Electrical characteristics apply in both directions.
Maximum Ratings & Thermal Characteristics Ratings at 25°C ambient temperature unless otherwise specified.
Parameter Symbol Value Unit
Peak pulse power dissipation with PPPM Minimum 1500 W
a 10/1000µs waveform(1)(2) (Fig. 1)
Peak pulse current with a 10/1000µs waveform(1) (Fig. 3) IPPM See Next Table A
Power dissipation on infinite heatsink, TA= 50°C PM(AV) 6.5 W
Peak forward surge current 10ms single half sine-wave IFSM 200 A
uni-directional only(2)
Typical thermal resistance junction to ambient air(3) RθJA 75 °C/W
Typical thermal resistance junction to leads RθJL 15 °C/W
Operating junction and storage temperature range TJ, TSTG –65 to +150 °C
Notes: (1) Non-repetitive current pulse, per Fig.3 and derated above TA= 25°C per Fig. 2
(2) Mounted on 0.31 x 0.31” (8.0 x 8.0mm) copper pads to each terminal
(3) Mounted on minimum recommended pad layout
Features
• Low profile package with built-in strain relief for
surface mounted applications
• Glass passivated junction
• Low inductance
• Excellent clamping capability
• 1500W peak pulse power capability with a 10/1000µs
waveform, repetition rate (duty cycle): 0.01%
• Fast response time: theoretically (with no parisitic
inductance) less than 1ps from 0 Volts to V(BR) for
undirectional and 5ns for bidirectional types
• High temperature soldering: 250°C/10 seconds at terminals
• Plastic package has Underwriters Laboratory
Flammability Classification 94V-0
0.280 (7.11)
0.260 (6.60)
0.012 (0.305)
0.006 (0.152)
0.008
(0.203)
Max.
0.320 (8.13)
0.305 (7.75)
0.060 (1.52)
0.030 (0.76)
0.245 (6.22)
0.220 (5.59)
0.126 (3.20)
0.114 (2.90)
0.103 (2.62)
0.079 (2.06)
Cathode Band
Dimensions in inches
and (millimeters)
DO-214AB (SMC J-Bend)
0.185 MAX.
(4.69 MAX.)
0.126 MIN.
(3.20 MIN.)
0.060 MIN.
(1.52 MIN.)
0.320 REF
Mounting Pad Layout
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 the band denotes the
cathode, which is positive with respect to the anode
under normal TVS operation
Standard Packaging: 12mm tape (EIA STD RS-481)
Weight: 0.003 oz., 0.093 g
Packaging Codes – Options (Antistatic):
51 – 1K per Bulk box, 10K/carton
57 – 850 per 7" plastic Reel (16mm tape), 8.5K/carton
9A – 3.5K per 13" plastic Reel (16mm tape), 35K/carton
SM15T Series
Vishay Semiconductors
formerly General Semiconductor
www.vishay.com Document Number 88380
209-Feb-04
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 5.0 11.4 12.6 1.0 16.7 90.0 21.7 461 7.8
SM15T15A GEG7 GEG7 12.8 1.0 14.3 15.8 1.0 21.2 71.0 27.2 368 8.4
SM15T18A GEM7 BEM7 15.3 1.0 17.1 18.9 1.0 25.2 59.5 32.5 308 8.8
SM15T22A GET7 BET7 18.8 1.0 20.9 23.1 1.0 30.6 49.0 39.3 254 9.2
SM15T24A GEV7 GEV7 20.5 1.0 22.8 25.2 1.0 33.2 45.0 42.8 234 9.4
SM15T27A GEX7 BEX7 23.1 1.0 25.7 28.4 1.0 37.5 40.0 48.3 207 9.6
SM15T30A GFE7 BFE7 25.6 1.0 28.5 31.5 1.0 41.5 36.0 53.5 187 9.7
SM15T33A GFG7 GFG7 28.2 1.0 31.4 34.7 1.0 45.7 33.0 59.0 169 9.8
SM15T36A GFK7 BFK7 30.8 1.0 34.2 37.8 1.0 49.9 30.0 64.3 156 9.9
SM15T39A GFM7 BFM7 33.3 1.0 37.1 41.0 1.0 53.9 28.0 69.7 143 10.0
SM15T68A GGG7 GGG7 58.1 1.0 64.6 71.4 1.0 92.0 16.3 121 83 10.4
SM15T100A GGV7 GGV7 85.5 1.0 95.0 105 1.0 137 11.0 178 56 10.6
SM15T150A GHK7 GHK7 128 1.0 143 158 1.0 207 7.20 265 38 10.8
SM15T200A GHR7 GHR7 171 1.0 190 210 1.0 274 5.50 353 28 10.8
SM15T220A GHR8 GHR8 188 1.0 209 231 1.0 328 4.60 388 26 10.8
Notes:
(1) For bi-directional devices add suffix “CA” instead of “A”
(2) VBR measured after ITapplied for 300µs square wave pulse
(3) For bipolar devices with VR=10 Volts or under, the ITlimit 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 (IPP) rating of this series. In an overstress condition, the failure mode is a short circuit.
Electrical Characteristics (TA=25ºC unless otherwise noted)
Type(1)
Device Marking
Code
Uni Bi
Standoff
Voltage
VRM
(V)
Leakage
Current(3
)
IRM@VR
Breakdown Voltage
VBR @ IT(2) (V)
Min Max
Clamping Voltage
VC @ IPP
(10/1000µs)
(V) (A)
Test
Current
IT
(mA)
Clamping Voltage
VC @ IPP
(8/20µs)
(V) (A)
αT
Max
10-4/°C
SM15T Series
Vishay Semiconductors
formerly General Semiconductor
Document Number 88380 www.vishay.com
09-Feb-04 3
Ratings and
Characteristic Curves (TA= 25°C unless otherwise noted)
CJ — Junction Capacitance (pF)
Fig. 4 – Typical Junction Capacitance
Uni-Directional
0
25
50
75
100
07525 50 100 125 150 175 200
Peak Pulse Power (PPP) or Current (IPP)
Derating in Percentage, %
TA — Ambient Temperature (°C)
10
100
1,000
10,000
20,000
101 100 400
VWM — Reverse Stand-Off Voltage (V)
Fig. 2 – Pulse Derating Curve
PPPM — Peak Pulse Power (kW)
Fig. 1 – Peak Pulse Power Rating Curve
0.1
1
10
100
0.1µs1.0µs 10µs
td — Pulse Width (sec.)
100µs 1.0ms 10ms
0.31 x 0.31" (8.0 x 8.0mm)
Copper Pad Areas
TJ = 25°C
f = 1.0MHz
Vsig = 50mVp-p
Measured at
Zero Bias
VR, Measured at
Stand-Off
Voltage, VWM
Fig. 6 - Maximum Non-Repetitive Forward
Surge Current Uni-Directional Use Only
1
10
100
10
100
200
Peak Forward Surge Current,
Amperes
Number of Cycles at 60Hz
8.3ms Single Half Sine-Wave
(JEDEC Method)
TJ = TJ max.
Uni-Directional
Bi-Directional
tp — Pulse Duration (sec)
Transient Thermal Impedance (°C/W)
Fig. 5 – Typical Transient Thermal
Impedance
0.1
1.0
10
100
0.001 0.01 0.1 1 10 100 1000
0
50
100
150
IPPM — Peak Pulse Current, % IRSM
Fig. 3 – Pulse Waveform
TJ = 25°C
Pulse Width (td)
is defined as the point
where the peak current
decays to 50% of IPPM
tr = 10µsec.
Peak Value
IPPM
Half Value — IPP
IPPM 2
td
10/1000µsec. Waveform
as defined by R.E.A.
01.0 2.0 3.0 4.0
t — Time (ms)
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
