?? ? 50 ---1000 v 2.5 a FR251 fr252 fr253 fr254 fr255 fr256 fr257 1000 50 100 200 400 600 800 50 100 200 400 600 800 1000 35 70 140 280 420 560 700 15 125 2.5 1.3 5.0 200 FR251 ...... fr257 150 300 FR251 fr252 fr253 fr254 fr255 fr256 fr257 siyu r ??? maximum repetitive peak reverse voltage ? maximum rms voltage ??? maximum dc blocking voltage ? maximum average forward rectified current ?? 8.3ms??? peak forward surge current 8.3 ms single half sine-wave typical thermal resistance o?? operating junction and storage temperature range -55 --- +150 v v v a a /w v rrm v rms v dc i f(av) i fsm tj, tstg ?? ta = 25 maximum ratings & thermal characteristics ratings at 25 ambient temperature unless otherwise specified. symbols unit plastic fast recover rectifier reverse voltage 50 to 1000v forward current 2.5a 45 ? ta= 25 ta=100 ?? i f =0.5a i r =1.0a i rr =0.25a ? v r = 4.0v, f = 1mhz v a ns pf i r trr c j maximum forward voltage maximum reverse current type junction capacitance ta = 25 electrical characteristics ratings at 25 ambient temperature unless otherwise specified. symbols unit max. reverse recovery time v f i f = 2.5a r ja dachang electronics features ? low reverse leakage ?? high forward surge capability o?? high temperature soldering guaranteed: 260 /10 , 0.375" (9.5mm) ?? 260 /10 seconds, 0.375" (9.5mm) lead length, ?? 5 (2.3kg) 5 lbs. (2.3kg) tension mechanical data : terminals: plated axial leads : ?? polarity: color band denotes cathode end ? : mounting position: any ??? rohs ? lead and body according with rohs standard do-15l unit mm 25.4 25.4 7.50.2 4.00.2 0.80.1 min min
siyu r i f (a) ?? ? v f (v) ? ta( c ) ? ?? i fsm (a) ? i f(av) (a) ??? characteristic curves typical forward characteristic forward current derating curve i f instantaneous forward current (a) v f instantaneous forward voltage (v) tamb, ambient temperature (c) i f(a) average forward rectified current (a) maximum non repetitive peak forward surge current number of cycles at 60 hz. i fsm peak forward surge current (a) 0.6 0.8 1 1.2 1.4 1.6 0.01 0.1 0.2 1 2 10 tj = 25 c 10mm 10mm 3.0 2.5 2.0 1.5 1.0 0.5 0 0 25 50 75 100 125 150 175 10mm 10mm 1 2 4 6 10 20 40 100 100 75 50 25 0 125 FR251 ...... fr257 dachang electronics
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