low cost diffused junction low leakage low forward voltage drop high current capability case: jedec do--27,molded plastic polarity: color band denotes cathode weight: 0.041ounces, 1.15 grams mounting position: any ratings at 25 ambient temperature unless otherwise specified. single phase,half wave,50hz,resistive or inductive load. for capacitive load,derate by 20%. units maximum recurrent peak reverse voltage v rrm v max imum rms v oltage v rms v maximum dc blocking voltage v dc v maximum average forw ard rectified current 9.5mm lead length, @t a =75 peak forw ard surge current 10ms single half-sine-w ave superimposed on rated load @t j =125 maximum instantaneous forw ard voltage @ 3.0 a v f v maximum reverse current @t a =25 at rated dc blocking voltage @t a =100 max imum rev er s e r ec ov er y time ( note1) t rr ns typical junction capacitance (note2) c j pf typical thermal resistance (note3) r ja /w operating junction temperature range t j storage temperature range t stg note:1. measured with i f =0.5a, i r =1a, i rr =0.25a. 2. measured at 1.0mh z and applied rev erse v oltage of 4.0v dc. 3. thermal resistance f rom junction to ambient. 800 560 -55-----+150 -55-----+150 1.0 20 32 70 60 voltage range: 800 v current: 3.0 a do - 27 maximum ratings and electrical characteristics easily cleaned with freon alcohol,isopropanol and s im ilar s olvents i f(av) BYW178 80 800 3.0 a i fsm i r a a 1.9 dimensions in millimeters BYW178 fast recovery rectifier features m echani cal d ata http://www.luguang.cn mail:lge@luguang.cn
-1.0a -0.25a 0 +0.5a t rr 1cm pulse generator (note2) d.u.t. 1 n.1. 50 n.1. oscilloscope (note 1) (+) 50vdc (approx) (-) 10 n.1. (-) (+) 0.9 1.0 1.2 1.4 1.6 0.01 0.02 0.06 0.04 0.1 0.2 0.4 1.0 2 4 10 100 t j =25 pulse width=300 s 1.8 2.0 2.2 2.3 0 1 100 10 246 2 0 406 0 t j =125 8.3ms single half sine-wave 20 100 80 60 40 0.6 1.2 1.8 2.4 3.0 025 100 150 0 175 50 125 75 si ngl e phase half walf 60hz resisti ve or inductive load amperes amperes amperes junction capacitance pf instantaneous forward voltage,volts reverse voltage,volts fig.5-- typical junction capacitance 2. rise time=10ns ma x. source impeda nce=5o average forward rectified curren t fig.3 --peak forward surge current notes:1.rise time =7ns max. input impedance=1m .22pf fi g. 1 -- reverse recovery ti me characteri sti c and test ci rcui t di agram fi g. 2 --forward derati ng curve fi g. 4--typi cal forward characteri sti c peak forward surge current instantaneous reverse current set time base for 25 ns /cm ambient temperature, number of cycles at 60 hz .1 .2 .4 1.0 2 4 10 20 40 100 1 2 4 10 20 40 60 100 t j =25 f=1mhz BYW178 fast recovery rectifier ratings and charactieristic curves http://www.luguang.cn mail:lge@luguang.cn
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