21201 itasca st. chatsworth, ca 91311 phone: ( 818) 701-4933 fax: (818) 701-4939 sra251 thru sra257 25 amp standard recovery rectifier 50 to 1000 volts features ? low cost ? low leakage ? low forward voltage drop ? high current capability ? for automotive applications maximum ratings ? operating temperature: -65 c to +175 c ? storage temperature: -65 c to +175 c microsemi part number maximum recurrent peak reverse voltage maximum rms voltage maximum dc blocking voltage sra251 50v 35v 50v sra252 100v 70v 100v sra253 200v 40v 200v sra254 400v 280v 400v SRA255 600v 420v 600v sra256 800v 560v 800v sra257 1000v 700v 1000v electrical characteristics @ 25 c unless otherwise specified average forward current i f(av) 25 a t a = 55 c peak forward surge current i fsm 400a 8.3ms, half sine maximum instantaneous forward voltage v f 1.0v i fm = 25a; t a = 25 c maximum dc reverse current at rated dc blocking voltage i r 10 a 150 a t a = 25 c t a = 55 c maximum reverse recovery time t rr 2 s i f =0.5a, i r =25a, i rr =0.25a typical junction capacitance c j 65pf measured at 1.0mhz, v r =4.0v *pulse test: pulse w idth 300 sec, duty cycle 1% sra dimensions inches mm dim min max min max note a .332 .342 8.43 8.69 b .165 .175 4.19 4.45 c .218 .222 5.54 5.64 d .234 .246 5.94 6.25 e --- 5 --- 5 nom a b c d e
average forward rectified current - amperes versus ambient temperature - c figure 2 forward derating curve 0 175 50 75 100 125 0 5 10 15 single phase, half wave 60hz resistive or inductive load amps c 150 20 25 30 instantaneous forward current - amperes versus instantaneous forward voltage - volts figure 1 typical forward characteristics 40 60 20 0 100 amps .4 .6 .8 1.0 1.2 1.4 .1 .2 .4 .6 1 2 4 6 10 20 25 c volts 1 100 4 0 100 200 300 8 figure 4 peak forward surge current peak forward surge current - amperes versus number of cycles at 60hz - cycles amps c y cles 2 6 10 20 60 80 40 400 500 600 junction capacitance - pf versus reverse voltage - volts figure 3 junction capacitance .1 .2 1 .4 2 10 20 40 4 100 200 1 2 6 10 20 100 pf volts 60 40 4 400 1000 t j =25 c sra251 thru sra257
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