frontier electronics co., ltd. 3a surface mount schottky barrier rectifiers features ! for surface mounted applications ! low profile package ! built-in strain relief ! easy pick and place ! plastic material used carries underwriters laboratory classification 94 v-0 ! extremely low vf ! majority carrier conduction ! high temperature soldering 250 /10 seconds at terminals mechanical data ! case tsma ! terminals solder plated ! polarity indicated by cathode band case-tsma ! weight 0.10 grams dimensions in inches and (millimeters) maximum ratings and electrical characteristics ratings 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% ratings symbol LK32A lk34a units maximum recurrent peak reverse voltage v rrm 20 40 v maximum rms voltage v rms 14 28 v maximum dc blocking voltage v dc 20 40 v maximum average forward rectified current see fig.1 i o 3.0 a maximum overload surge 8.3ms single half sine-wave i fsm 80 a storage temperature range t stg -55 to + 150 operating temperature range t op -55 to + 125 electrical characteristics (a t t a =25 c unless otherwise noted) characteristics symbol LK32A lk34a units maximum forward voltage at 3.0a ac and 25 v f 0.38 0.40 v maximum reverse current at 25 i r 0.5 ma LK32A thru lk34a .165(4.2) .150(3.8) .185(4.8) .177(4.4) .04(1.0) typ .110(2.8) .094(2.4) cathode .067(1.7) .060(1.5) .012(0.3) typ .220(5.58) ref .052(1.32) min .08(2.03) min soldering pad .094(2.38) max
ratings and chracteristic curve LK32A thru lk34a fig. 1 - forward current derting curve 2.0 1.0 0 i o -average rectified current (a) 0 20 40 60 80 100 120 140 160 180 200 single phase half wave 60h z resistive or inductive load lead temperature ( ) fig. 3 - typical reverse chracteristics 100 10 1.0 .10 .01 .001 instntaneous reverse current, milliamperes 0 20 40 60 80 100 120 140 percent of rated peak reverse voltage, (%) fig. 4 - typical junction capacitance 400 200 100 80 60 40 20 10 junction capcitance, p f 0.1 0.4 1.0 4 10 40 100 reverse voltage, volts fig. 5 - maximum non-repetitive surge current 50 40 30 20 10 0 peak forward surge current, amperes 1 2 4 10 20 40 100 number of cycles at 60h z 8.3ms single half sine-wave (jedec method) t j =25 pulse width=300us 1% duty cycle fig.2 - typicl oinstantaneous forward characteristics 20 10 1.0 0.1 instantaneous forward current amperes .1 .3 .5 .7 .9 1.1 1.3 1.5 1.7 1.9 2.1 instantaneous forward voltge, volts p.c.b mounted on 0.30.3?(8.08.0mm) copper pad areas t a =25
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