byw54 - byw56 avalanche rectifier diodes prv : 600 - 1000volts io : 2.0 amperes features : * high current capability * high surge current capability * high reliability * low reverse current * low forward voltage drop mechanical data : * case : d2 molded plastic * epoxy : ul94v-o rate flame retardant * lead : axial lead solderable per mil-std-202, method 208 guaranteed * polarity : color band denotes cathode end * mounting position : any * weight : 0.465 gram maximum ratings and electrical characteristics rating at 25 c ambient temperature unless otherwise specified. single phase, half wave, 60 hz, resistive or inductive load. for capacitive load, derate current by 20%. symbol byw54 BYW55 byw56 unit maximum repetitive peak reverse voltage v rrm 600 800 1000 v maximum crest working reverse voltage v rwm 600 800 1000 v maximum continuous reverse voltage v r 600 800 1000 v min. reverse avalanche breakdown voltage @ i r = 0.1 ma v (br)r-min. 650 900 1300 v maximum average forward current t tp = 45 c (note 1) i f(av) 2.0 a maximum non-repetitive peak forward surge current i fsm 50 a maximum repetitive peak forward current i frm 12 a maximum forward voltage at i f = 1.0 a v f 1.0 v maximum reverse current at v r = v rrm i r 1.0 m a maximum reverse current at v r = v rrm , tj = 165 c i r(h) 150 m a typical reverse recovery time (note 2) trr 3.0 m s thermal resistance - junction to ambient r q ja 100 k / w junction temperature range t j - 65 to + 175 c storage temperature range t stg - 65 to + 175 c notes : (1) lead length 10 mm. (2) test conditions : i f = 0.5 a to i r = 1 a ; measured at irr = 0.25 a page 1 of 2 rev. 02 : march 25, 2005 rating d2 1.00 (25.4) min. 0.161 (4.1) 0.154 (3.9) 0.284 (7.2) 0.268 (6.8) 0.034 (0.86) 0.028 (0.71) 1.00 (25.4) min. dimensions in inches and ( millimeters ) * pb / rohs free
rating and characteristic curves ( byw54 - byw56 ) fig.1 - reverse recovery time characteristic and test circuit diagram + notes : 1. rise time = 7 ns max., input impedance = 1 megaohm, 22 pf. 2. rise time = 10 ns max., source impedance = 50 ohms. 3. all resistors = non-inductive types. fig.2 - derating curve for output fig.3 - maximum non-repetitive peak rectified current forward surge current 0 25 50 75 100 125 150 175 1 2 4 6 10 20 40 60 100 tie-point temperature, ( c) number of cycles at 60hz fig.4 - typical forward characteristics fig.5 - typical reverse characteristics 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 forward voltage, volts page 2 of 2 rev. 02 : march 25, 2005 1.6 1.2 0.8 0.4 2.0 100 10 1.0 40 0 50 0 30 20 10 0.1 10 80 0.01 0.01 1.0 0.1 100 140 0 20 40 60 120 percent of rated reverse voltage, (%) peak forward surge current, amperes average forward output current, amperes forward current, amperes reverse current, microamperes t j = 25 c t j = 100 c t j = 25 c trr + 0.5 a 0 - 0.25 a - 1.0 a 50 vdc (approx) oscilloscope ( note 1 ) 1 w 50 w 10 w d.u.t. pulse generator ( note 2 )
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