rohs compliant microsemi catalog number fst20040* fst20045* fst20050* 50v 45v 40v reverse voltage repetitive peak schottky barrier rectifier guard ring protection electrical characteristics average forward current per pkg average forward current per leg maximum surge current per leg max peak forward voltage per leg max peak forward voltage per leg max peak reverse current per leg max peak reverse current per leg f(av) f(av) fsm fm fm rm rm i i i v v i i t t v i i t t t t t thermal and mechanical characteristics 200 amperes/35 to 50 volts storage temp range operating junction temp range max thermal resistance per leg typical thermal resistance (greased) terminal torque 35-50 inch pounds t t o o r r 30-40 inch pounds mounting base torque case to sink working peak reverse voltage 40v 45v 50v *add suffix a for common anode, d for doubler reverse energy tested typical junction capacitance per leg j c v t maximum repetitive reverse current per leg r(ov) i *pulse test: pulse width 300sec, duty cycle 2% fst20035* 35v 35v weight 3.4 ounces (95 grams) typical schottky powermod fst20035 - fst20050 175 c junction temperature c = 143c, square wave, 0jc = 0.25c/w c = 143c, square wave, 0jc = 0.50c/w 8.3ms, half sine, j = 175c f = 1 khz, 25c, 1sec square wave fm = 200a: j = 25c* fm = 200a: j = 175c* rrm, j = 125c* rrm, j = 25c r = 5.0v, c = 25c v -55c to 175c -55c to 175c stg j jc cs junction to case 0.08c/w 0.05c/w 4600 pf 4.0 ma 75 ma 0.60 volts 0.80 volts 2 amps 2000 amps 100 amps 200 amps captive lockwasher 1/4-20unc with e 0.625 --- 15.88 --- d 17.78 0.700 7.670 7.140 0.300 0.280 a b f c d g baseplate common cathode baseplate a=common anode baseplate d=doubler notes: baseplate: nickel plated copper dim. inches millimeters a b c e f g --- 34.29 79.76 --- 62.23 35.56 20.32 80.26 92.71 --- 1.350 3.140 --- 2.450 1.400 0.800 3.160 3.650 dia. min. max. min. max. notes r r to-244ab max thermal resistance per pkg jc r o 0.25c/w junction to case january, 2010 - rev. 4 www.microsemi.com
25 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 figure 1 figure 2 50 100 5.0 10 1.0 0.5 100,000 60,000 40,000 20,000 10,000 6000 4000 2000 1000 figure 3 0.1 junction capacitance - pf 100 10 1.0 0.1 reverse voltage - volts 10 20 30 40 reverse voltage - volts 50 .01 typical reverse current - ma 175 c 75 c 25 c forward current derating - per leg figure 4 average forward current - amperes maximum allowable case temperature - c 175 165 155 145 0 30 180 120 60 90 dc 0 0 30 average forward current - amperes maximum power dissipation - watts figure 5 maximum forward power dissipation - per leg 60 90 120 180 dc fst20035 - fst20050 typical forward characteristics - per leg typical junction capacitance - per leg typical reverse characteristics - per leg 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1000 125 c 0 105 115 125 135 60 90 120 150 60 90 120 150 105 90 75 60 45 30 15 175 c january, 2010 - rev. 4 www.microsemi.com
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