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SM15T SERIES
TRANSZORBTM SURFACE MOUNT TRANSIENT VOLTAGE SUPPRESSOR
Breakdown Voltage - 6.8 to 220 Volts Peak Pulse Power - 1500 Watts
FEATURES
DO-214AB
0.126 (3.20) 0.114 (2.90)
0.245 (6.22) 0.220 (5.59)
0.280 (7.11) 0.260 (6.60) 0.012 (0.305) 0.006 (0.152)
0.103 (2.62) 0.079 (2.06)
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 VBR min. Typical ID less than 1A above 10V High temperature soldering: 250C/10 seconds at terminals Plastic package has Underwriters Laboratory Flammability Classification 94V-0
0.060 (1.52) 0.030 (0.76) 0.320 (8.13) 0.305 (7.75)
MECHANICAL DATA
0.008 (0.203) MAX.
Dimensions in inches and (millimeters)
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) Peak Pulse Current on 10/1000s waveform (NOTE 1, Fig. 3) Power Dissipation on Infinite Heatsink, TA=50C Peak Forward Surge Current, 10ms Single Half Sine-wave, Undirectional Only Max. Junction Temperature Storage Temperature Range Thermal Resistance Junction to Ambient Air (NOTE 2) Thermal Resistance Junction to Leads
PPPM IPPM PM(AV) IFSM TJ TSTG RJA RJL
Minimum 1500 See Table 1 6.5 200 150 -65 to +175 75 15
Watts Amps Watts Amps C C C/W C/W
NOTES: (1) Non-repetitive current pulse, per Fig. 3 and derated above TA=25C per Fig. 2 (2) Mounted on 5.0mm2 (.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
ELECTRICAL CHARACTERISTICS RATINGS at (TA=25C unless otherwise noted)
Device Marking Code Uni SM15T6V8A SM15T7V5A SM15T10A SM15T12A SM15T15A SM15T18A SM15T22A SM15T24A SM15T27A SM15T30A SM15T33A SM15T36A SM15T39A SM15T68A SM15T100A SM15T150A SM15T200A SM15T220A GDE7 GDK7 GDT7 GDX7 GEG7 GEM7 GET7 GEV7 GEX7 GFE7 GFG7 GFK7 GFM7 GGG7 GGV7 GHK7 GHR7 GHR8 Bi GDE7 BDK7 BDT7 BDX7 GEG7 BEM7 BET7 GEV7 BEX7 BFE7 GFG7 BFK7 BFM7 GGG7 GGV7 GHK7 GHR7 GHR8 Standoff Leakage Voltage Current(3) VRM IRM @ VRM (Volts) 5.80 6.40 8.55 10.2 12.8 15.3 18.8 20.5 23.1 25.6 28.2 30.8 33.3 58.1 85.5 128 171 188 (A) 1000 500 10.0 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 5.00 Breakdown Voltage VBR @ IT(2) (Volts) Min 6.45 7.13 9.50 11.4 14.3 17.1 20.9 22.8 25.7 28.5 31.4 34.2 37.1 64.6 95.0 143 190 209 Max 7.14 7.88 10.5 12.6 15.8 18.9 23.1 25.2 28.4 31.5 34.7 37.8 41.0 71.4 105 158 210 231 Test Current IT (mA) 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 Clamping Voltage Clamping Voltage VC @ IPP VC @ IPP 10/1000s 8/20s (Volts) 10.5 11.3 14.5 16.7 21.2 25.2 30.6 33.2 37.5 41.5 45.7 49.9 53.9 92.0 137 207 274 328 (Amps) 143 132 103 90.0 71.0 59.5 49.0 45.0 40.0 36.0 33.0 30.0 28.0 16.3 11.0 7.20 5.50 4.60 (Volts) 13.4 14.5 18.6 21.7 27.2 32.5 39.3 42.8 48.3 53.5 59.0 64.3 69.7 121 178 265 353 388 (Amps) 746 690 538 461 368 308 254 234 207 187 169 156 143 83 56 38 28 26 5.7 6.1 7.3 7.8 8.4 8.8 9.2 9.4 9.6 9.7 9.8 9.9 10.0 10.4 10.6 10.8 10.8 10.8
T
Max 10-4/C
Type(1)
NOTES: (1) For bi-directional devices add "C" for 10% and "CA" for 5% tolerance of VBR (2) VBR measured after IT applied for 300s square wave pulse (3) For bipolar devices with VR=10 Volts or under, the IT 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 (IPP) 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
0.190 (4.83)
0.125 (3.17)
0.070 (1.78)
RATINGS AND CHARACTERISTIC CURVES SM15T SERIES
FIG. 1 - PEAK PULSE POWER RATING CURVE
NON-REPETITIVE PULSE WAVEFORM SHOWN in FIG. 3 TA=25C
0.31 X 0.31" (8.0 X 8.0mm) COPPER PAD AREAS
td, PULSE WIDTH, sec.
PEAK PULSE POWER (PPP) or CURRENT (IPP) DERATING IN PERCENTAGE, %
FIG. 2 - PULSE DERATING CURVE
PPPM, PEAK PULSE POWER, kW
TA, AMBIENT TEMPERATURE, C
FIG. 3 - PULSE WAVEFORM IPPM PEAK PULSE CURRENT, % IRSM
TJ=25C PULSE WIDTH (td) is DEFINED as the POINT WHERE the PEAK CURRENT DECAYS to 50% of IPPM
FIG. 4 - TYPICAL JUNCTION CAPACITANCE UNIDIRECTIONAL
tr=10sec. PEAK VALUE IPPM
MEASURED at ZERO BIAS
HALF VALUE - IPP 2 10/1000sec. WAVEFORM as DEFINED by R.E.A.
CJ, JUNCTION CAPACITANCE, pF
TJ=25C f=1.0 MHZ Vsig=50mVp-p VR, MEASURED at STAND-OFF VOLTAGE, VWM
td
t, TIME, ms
FIG. 5 - TYPICAL JUNCTION CAPACITANCE BIDIRECTIONAL
TJ=25C f=1.0 MHZ Vsig=50mVp-p MEASURED at ZERO BIAS
VWM, REVERSE STAND-OFF VOLTAGE, VOLTS
FIG. 6 - MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT IFSM, PEAK FORWARD SURGE CURRENT, AMPERES
8.3ms SINGLE HALF SINE-WAVE (JEDEC Method) UNIDIRECTIONAL ONLY
CJ, CAPACITANCE, pF
MEASURED at STAND-OFF VOLTAGE, VWM
NUMBER OF CYCLES AT 60 HZ
VWM, STAND-OFF VOLTAGE, VOLTS

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