preferred 100 kw transient voltage suppressor for aircraft power bus protection www. microsemi . com scottsdale division rt100kp33a thru rt100kp400ca, e3 rt100kp33a ? 400ca, e3 description appearance microsemi?s 100 kw transient voltage suppressors (tvss) are designed for aircraft applications requiring high power transient protection with a comparatively small axial-leaded package size. this includes various threats such as ?waveform 4? at 6.4/69 s per rtca/do-160e section 22. it is also available with screening in accordance with mil-prf-19500 o r avionics screening as described in the features section herein. it may also be optionally acquired with rohs compliant (annealed matte-tin finish) with an e3 suffix added to the part number. microsemi also offers a broad spectrum of other tvss to meet your needs. important: for the most current data, consult microsemi?s website: http://www.microsemi.com features applications / benefits ? available in both unidirectional and bidirectional construction (bidirectional with ca suffix) ? tvs selection for 33 to 400 v standoff voltages (v wm ) ? suppresses transients up to 100 kw @ 6.4/69 s ? fast response with less than 5 ns turn-on time. ? optional 100% screening for avionics grade is available by adding ma prefix to part number for added 100% temperature cycle -55 o c to +125 o c (10x), surge (3x) in each direction, 24 hours htrb in each direction, and post test (v br and i d ) ? options for screening in accordance with mil-prf-19500 for jan, jantx, and jantxv are also available by adding mq, mx, or mv prefixes respectively to part numbers. ? moisture classification is level 1 with no dry pack required per ipc/jedec j-std-020b. ? rohs compliant devices available by adding ?e3? suffix ? protection from high power switching transients, induced rf, and lightning threats with comparatively small package size (0.25 inch diameter) ? protection from esd and eft per iec61000-4-2 and iec61000-4-4 ? pin injection protection per rtca/do-160e up to level 4 for waveform 4 (6.4/69 s) on all devices ? pin injection protection per rtca/do-160e up to level 5 for waveform 4 (6.4/69 s) on device types rt100kp33a or ca up to rt100kp260a or ca ? pin injection protection per rtca/do-160e up to level 3 for waveform 5a (40/120 s) on all devices ? pin injection protection per rtca/do-160e up to level 4 for waveform 5a (40/120 s) on device types rt100kp33a or ca up to rt100kp64a or ca ? consult factory for other voltages with similar peak pulse power capabilities. maximum ratings mechanical & packaging ? peak pulse power dissipation at 25oc: 100 kw at 6.4/69 s waveform in figure 8 (also see figures 1 and 2) ? impulse repetition rate: 0.005% ? t clamping (0 volts to v br min): <100 ps theoretical for unidirectional and <5 ns for bidirectional ? operating & storage temperatures: -65 o c to +150 o c ? thermal resistance: 17.5c/w junction to lead, or 77.5c/w junction to ambient when mounted on fr4 pc board with 4 mm 2 copper pads (1 oz ) and track width 1 mm, length 25 mm ? steady-state power dissipation: 7 watts @ t l = 27.5 o c or 1.61 watts at ta =25 o c when mounted on fr4 pc board described for thermal resistance above ? forward surge: 250 amps 8.3 ms half-sine wave for unidirectional devices only ? solder temperatures: 260 o c for 10 s maximum ? case: void free transfer molded thermosetting epoxy meeting ul94v-o requirements ? finish: tin-lead or rohs compliant matte-tin plating solderable per mil-std-750, method 2026 ? polarity: cathode marked with band for unidirectional (no band required for bi-directional) ? marking: manufacturers logo and part number. add prefix ma, mq, mx, etc., for screened parts. ? weight: 1.7 grams (approximate) ? tape & reel option: standard per eia-296 for axial package (add ?tr? suffix to part number) ? package dimensions: see last page microsemi scottsdale division page 1 copyright ? 2007 10-03-2007 rev b 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503
preferred 100 kw transient voltage suppressor for aircraft power bus protection www. microsemi . com scottsdale division rt100kp33a thru rt100kp400ca, e3 rt100kp33a ? 400ca, e3 electrical characteristics at 25oc rated stand-off voltage v wm breakdown voltage v (br) volts @ i (br) v (br) i (br) maximum clamping @ i pp (2) v c maximum reverse leakage @ v wm i d maximum peak pulse current (3) @6.4/69 s i pp maximum v (br) temperature coefficient v(br) part number (1) (4) volts volts ma volts amps amps mv/ o c rt100kp33a rt100kp36a 33 36 36.7-40.6 40.0-44.2 50 50 58.6 61.8 5000 5000 1825 * 1672 * 38 41 rt100kp40a rt100kp43a 40 43 44.4-49.1 47.8-52.8 20 10 68.6 71.0 1500 500 1518 * 1432 * 46 50 rt100kp45a rt100kp48a 45 48 50.0-55.3 53.3-58.9 5 5 73.0 77.7 150 150 1365 * 1285 * 52 56 rt100kp51a rt100kp54a 51 54 56.7-62.7 60.0-66.3 5 5 82.8 87.5 50 25 1205 * 1139 * 60 63 rt100kp58a rt100kp60a 58 60 64.4-71.2 66.7-73.7 5 5 94.0 97.3 15 15 1066 * 1012 * 68 71 rt100kp64a rt100kp70a 64 70 71.1-78.6 77.8-86.0 5 5 104 114 10 10 959 * 879 76 83 rt100kp75a rt100kp78a 75 78 83.3-92.1 86.7-95.8 5 5 122 126 10 10 819 793 89 93 rt100kp85a rt100kp90a 85 90 94.4-104 100-111 5 5 137 146 10 10 726 686 102 109 rt100kp100a rt100kp110a 100 110 111-123 122-135 5 5 162 178 10 10 619 559 121 133 rt100kp120a rt100kp130a 120 130 133-147 144-159 5 5 193 209 10 10 519 473 145 157 rt100kp150a rt100kp160a 150 160 167-185 178-197 5 5 243 259 10 10 413 386 183 195 rt100kp170a rt100kp180a 170 180 189-209 200-221 5 5 275 291 10 10 366 346 207 219 rt100kp200a rt100kp220a 200 220 222-245 245-271 5 5 322 356 10 10 313 280 243 269 rt100kp250a rt100kp260a rt100kp280a rt100kp300a 250 260 280 300 278-308 289-320 311-345 333-369 5 5 5 5 403 419 451 483 10 10 10 10 246 236 220 206 306 318 344 368 rt100kp350a rt100kp400a 350 400 389-431 444-492 5 5 564 644 10 10 176 153 430 490 1. for bidirectional cons truction, indicate a ca suffix (instead of a) after the part number 2. clamping voltage does not include any va riable parasitic lead i nductance effects observed during the 6.4 s rise time due to lead length. 3. the maximum peak pulse current (i pp ) shown represents the performance capabilities by design. * surge test screening is only per formed up to 900 amps (test equipment limitations). 4. part numbers in bold italics are preferred devices. microsemi scottsdale division page 2 copyright ? 2007 10-03-2007 rev b 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503
preferred 100 kw transient voltage suppressor for aircraft power bus protection www. microsemi . com scottsdale division rt100kp33a thru rt100kp400ca, e3 rt100kp33a ? 400ca, e3 graphs microsemi scottsdale division page 3 copyright ? 2007 10-03-2007 rev b note: this p pp versus time graph allows the designer to use these parts over a broad power spectrum using the guidelines illustrated in a pp note 104 on microsemi?s website. a ircraft transients are described with exponential decaying waveforms. for suppression of square- wave impulses, derate power and current to 66% of that for exponential decay shown in figure 1. p pp peak pulse power vs. pulse time ? kw non-re p etitive pulse peak pulse power ( p pp ) or continuous power in % of 25 o c ratin g tp ? pulse time ? sec. t l lead temperature o c figure 1 figure 2 peak pulse power vs. pulse time power derating to 50% of exponentially decaying pulse correct wrong figure 3 figure 5 installation tvs devices used across power lines are subject to relatively high magnitude surge currents and are more prone to adverse parasitic inductance effects in the mounting leads. minimizing the shunt path of the lead inductance and their v= -ldi/dt effects will optimize the tvs effectiveness. examples of optimum installation and poor installation are illustrated in figures 3 through figure 6. figure 3 illustrates minimal parasitic inductance with attachment at end of device. inductive voltage drop is across input leads. virtually no ?overshoot? voltage results as illustrated with figur e 4. the loss of effectiveness in protection caused by excessive parasitic inductance is illustrated in figures 5 and 6. also see micronote 111 for further information on ?parasitic lead inductance in tvs?. figure 4 figure 6 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503
preferred 100 kw transient voltage suppressor for aircraft power bus protection www. microsemi . com scottsdale division rt100kp33a thru rt100kp400ca, e3 rt100kp33a ? 400ca, e3 t note: frequency is 1mhz t ? time t ? time t - time figure 7 ? waveform 3 figure 8 ? waveform 4 figure 9 ? waveform 5a note: the 1mhz damped oscillatory wavefo rm (3) has an effective pulse width of 4 s. equivalent peak pulse power at each of the pulse widths represented in rtca/do-160e for waveforms 3, 4 a nd 5a (above) have been determined referencing figure 1 herein as well as application notes 10 4 and 120 (found on microsemi?s website) and are listed below. waveform number pulse width s peak pulse power kw peak pulse current conversion factor * from rated i pp at 6.4/69 s 3 4 340 3.40x 4 6.4/69 100 1.00x 5a 40/120 70 0.70x * multiply by the conversion factor shown with reference to the maximum rated i pp in the electrical characteristics table on page 2. note: high current fast rise-time transients of 250 ns or less can more than triple the v c from parasitic inductance effects (v= -ldi/dt) compared to the clamping voltage shown in the initial elec trical characteristics on page 1 as al so described in figures 5 and 6 herein. also see micronotes 127, 130, and 132 on the microsemi website (support section) for further information on transient voltage suppressors with reference to airc raft industry specification rtca/do-160e. dimensions microsemi scottsdale division page 4 copyright ? 2007 10-03-2007 rev b 8700 e. thomas rd. po box 1390, scottsdale, az 85252 usa, (480) 941-6300, fax: (480) 947-1503
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