ru4 - RU4B fast recovery rectifiers prv : 400 - 800 volts io : 1.5 amperes features : * high current capability * high surge current capability * high reliability * low reverse current * low forward voltage drop * fast switching for high efficiency mechanical data : * case : do-201ad 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 : 1.21 grams 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 ru4 ru4a RU4B unit maximum peak reverse voltage v rm 400 600 800 v maximum peak reverse surge voltage v rsm 400 600 800 v maximum average forward current ta = 60 c i f(av) 1.5 ( 3.0 with heatsink ) a maximum peak forward surge current ( 50 hz, half-cycle, sine wave, single shot ) maximum forward voltage at i f = 3 amps. v f 1.5 1.6 v maximum reverse current at v r = v rm ta = 25 c i r 10 m a maximum reverse current at v r = v rm ta = 100 c i r(h) 300 500 m a maximum reverse recovery time ( note 1 ) trr 0.4 m s junction temperature range t j - 40 to + 150 c storage temperature range t stg - 40 to + 150 c notes : ( 1 ) reverse recovery test conditions : i f = 10 ma, i rp = 10 ma. page 1 of 2 rev. 02 : march 25, 2005 rating i fsm 50 a do-201ad 0.3.75 (9.53) 0.285 (7.24) 0.21 (5.33) 0.19 (4.83) 0.052 (1.32) 0.048 (1.22) 1.00 (25.4) min. 1.00 (25.4) min. dimensions in inches and ( millimeters ) * pb / rohs free
rating and characteristic curves ( ru4 - RU4B) fig.1 - reverse recovery time characteristic and test circuit diagram 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 ambient temperature, ( c) number of cycles at 50hz 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 page 2 of 2 rev. 02 : march 25, 2005 ta = 25 c 2.4 1.8 1.2 0.6 3.0 10 10 1.0 40 0 50 0 30 20 10 1.0 80 0.01 0.1 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 20 m s 200 m s forward voltage, volts 0.001 0.01 10 ma i f 10 ma i rp 100 w note : i f = i rp = 10 ma to 1 ma 100 m f trr 0.1 i rp specimen without heatsink with 5mm 5mm 20 x 20 x 1tcu 50
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