rohs compliant electrical characteristics thermal and mechanical characteristics .015 .025 0.38 0.64 .085 .065 2.16 1.65 .260 .240 6.60 6.10 .098 .088 2.49 2.24 .370 .350 9.40 8.89 .110 .120 .100 2.54 2.79 3.04 d millimeter notes maximum minimum maximum minimum 29.97 30.35 1.180 1.195 e f g h j k l dim. inches 26.12 26.42 1.020 1.040 .695 .715 17.65 18.16 schottky power surface mount .110 2.79 fst81sm1-sm6 series 35v 40v 45v 45v 40v 35v m 1.490 1.510 37.85 38.35 n .695 .715 17.65 18.16 .027 .037 0.69 0.94 microsemi catalog catalog number working peak reverse voltage repetitive peak reverse voltage 3 2 1 m 3 pins eq sp at .200 g c h j n e 3 2 1 l 3 2 1 f a1 a2 a3 sm1 & sm2 sm3 & sm4 sm5 & sm6 b d a1 a2 a3 b c .151 .161 3.84 4.09 for sm2, sm4, & sm6 dia. typ. pin configuration d b typ. pin configuration for sm1, sm3, & sm5 k t t j stg typical thermal resistance (greased) max thermal resistance per pkg. max thermal resistance per leg operating junction temp range storage temp range r ojc 1.0c/w 0.5c/w 0.3 ounce (8.4 grams) typical weight mounting base torque -55c to 150c -55c to 175c case to sink *pulse test: pulse width 300sec, duty cycle 2% average forward current per pkg average forward current per leg maximum surge current per leg max repetitive peak reverse current per leg max peak forward voltage per leg max peak forward voltage per leg max peak reverse current per leg typical junction capacitance per leg f(av) 80 amps f(av) 40 amps fsm 800 amps r(ov) 2 amps fm 0.47 volts fm 0.53 volts rm 500 ma j 2100 pf rm 3.0 ma i i i i v v i i c c = 110c, square wave, 0jc = 0.5c/w c = 110c, square wave, 0jc = 1.0c/w 8.3 ms, half sine, j = 150c f = 1 khz, 25c, 1sec square wave fm = 40a: j = 150c* fm = 40a: j = 25c* rrm, c = 125c* rrm, j = 25c r = 5.0v, c = 25c r r v v v i i t t t t t t .230 .250 5.84 6.35 2 specify c-common cathode, a-common anode, d-doubler 10 inch pounds maximum (sm1, 2) sm1-2 sm3-4 ounce ( grams) typical ounce ( grams) typical note: 1 specify (1-6) to identify package desired fst8135sm _ _ fst8140sm _ _ fst8145sm _ _ 1 2 6.7 5.2 0.24 0.18 sm5-6 t t ojc r junction to case junction to case 0.3c/w ocs r note: baseplate common with pin 2 2-plcs. d=doubler a=common anode common cathode 1 2 1 2 1 2 3 3 3 max peak reverse current per leg industry part number 80cnq035asl 80cnq040asl 80cnq045asl 80cnq035asm 80cnq040asm 80cnq045asm 2 x 40 amperes avg. 150c junction temperature low forward voltage common cathode center tap guard ring protection schottky barrier rectifier reverse energy tested january, 2010 - rev. 4 www.microsemi.com
25 c 150 c instantaneous forward voltage - volts instantaneous forward current - amperes 1000 800 600 400 200 100 80 60 40 20 10 8.0 6.0 4.0 2.0 1.0 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 typical forward characteristics - per leg figure 1 dc 60 90 120 180 average forward current - amperes maximum allowable case temperature - c 50 45 40 35 30 25 20 15 10 0.5 0 150 140 130 120 110 100 90 80 figure 3 forward current derating - per leg 50 100 5.0 10 1.0 0.5 10000 6000 4000 2000 1000 600 400 200 100 typical junction capacitance - per leg figure 4 0.1 junction capacitance - pf 150 c 125 c 75 c 25 c 1000 100 10 1.0 0.1 figure 2 .01 typical reverse current - amperes 0 10 20 30 40 50 reverse voltage - volts dc 60 90 120 180 maximum forward power dissipation - per leg figure 5 0 5.0 10 15 20 25 30 35 0 5.0 10 15 20 25 30 35 40 45 50 maximum power dissipation - watts average forward current - amperes typical reverse characteristics - per leg reverse voltage - volts fst81sm1 - sm6 january, 2010 - rev. 4 www.microsemi.com
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