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  f r 2 5 1 t h r u f r 2 5 7 fast recovery rectifier reverse voltage: 50 to 1000 volts forward current:2.5amperes features mechanical data maximum ratings and electrical characteristics case : jedec do -15 molded plastic body terminals : plated axial leads, solderable per mil-std-750,method 2026 polarity : color band denotes cathode end mounting position : any weight : 0.03 ounce, 0.54 gram note : 1.t est conditions: i f= 0.5a,i r =1.0a,i rr =0.25a. (rating at 25 c ambient temperature unless otherwise specified.single phase ,half wave ,60h z ,resistive or inductive load. f or capacitive load,derate current by 20%.) 2.measured at 1mh z and applied reverse voltage of 4.0 v olts d.c. low leakage maximum recurrent peak reverse v oltage v rrm v olts v olts v olts v olts a p f a mps a mps v rms v dc i (a v) i fsm t stg v f i r t rr c j maximum rms v oltage maximum dc blocking v oltage maximum a verage forward rectified current 0.375"(9.5mm)lead length at t a =75c maximum instantaneous forward v oltage at 2.5 a operating junction and storage temperature range maximum reverse recovery time(note1) t ypical junction capacitance(note2) peak forward surge current ,8.3ms single half sine-wave -65 to+175 150 60 500 250 c t j 50 50 35 100 100 70 200 200 140 400 400 280 600 600 420 800 800 560 1000 1000 700 150 1.3 2.5 pf dimensions in inches and (millimetrers) r s e m i c o n d u c t o r symbols units fr 251 fr 252 fr 253 fr 254 fr 255 fr 256 fr 257 maximum dc reverse current at rated dc blocking voltage 150 10 t a =25c t a =100c 3 0 high reliability high current surge high current capability low forward voltage drop jinan jinghen g co., l td. no .51 heping ro ad jinan p .r. china tel:86-531-86943 657 f ax:86-531-869470 96 www .jifusemicon. com 7- 28 component in accordance to rohs 2002/95/ec and weee 2002/96/ec high temperature soldering guaranteed:260c/10 seconds at terminals n s do-1 5 0.300(7.60) 0.144(3.6) 0.036(0.90) 1.0(25.4) min 1.0(25.4) min 0 . 2 3 0 ( 5 . 6 0 ) 0.104(2.6) dia 0.028(0.70) dia j f j f
r at i n g s a n d c h a r a c t e r i s t i c c u r v e s f r 2 5 1 t h r u f r 2 5 7 25 0 50 75 100 125 150 0.4 1 4 8 6 2 60 10 20 40 100 0.6 0.8 1.0 1.2 1.4 1.8 1.6 0 25 50 75 100 125 150 175 fig.1-typical forward current derating curve fig.2-maximum non-repetitive forward surge current fig.3-typical instantaneous forward characteristics a v e r a g e f o r w a r d c u r r e n t ( a ) i n s t a n t a n e o u s f o r w a r d c u r r e n t ( a m p e r e s ) p e a k f o r w a r d s u r g e c u r r e n t ( a m p e r e s ) instantaneous forward voltage (volts) reverse voltage. (v) set time base for 50/100 ns/cm number of cycles at 60hz ambient temperature ( c) t j =25 c 8.3ms single half sine- wa ve (jedec method) 1 2 6 4 0.1 0.2 0.4 1 4 2 10 40 20 1cm trr -0.25a 0 +0.5a -1.0a 100 10 60 40 100 20 200 fig.4-typical junction capacitance fig.5-test circuit diagram and reverse recovery time characteristic j u n c t i o n c a p a c i t a n c e ( p f ) t j =25 c singie phase haif wa ve 60h z resistive or inductive l oad pulse w idth=300 s 1% duty cycle 0.01 0.03 0.1 0.3 1 3 10 20 0 0.5 1.0 1.5 2.0 2.5 jinan jinghen g co., l td. no .51 heping ro ad jinan p .r. china tel:86-531-86943 657 f ax:86-531-869470 96 www .jifusemicon. com 7- 29 pulse generator (note2) noninductive oscilloscope (note1) d.u.t . noninductive nonin- ductive 50vdc 1 ( ? ) ( ? ) notes:1.rise t ime=7ns max. input lmpedance=1 megohm 22pf 2.rise t ime=10ns max. source lmpedance= 50 ohms (adjust able)


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