- 142 - srf2020 thru SRF2060 isolation 20.0 amps. schottky barrier rectifiers voltage range 20 to 60 volts current 20.0 amperes features low forward voltage drop high current capability high reliability high surge current capability mechanical data cases: ito-220ab molded plastic epoxy: ul 94v-o rate flame retardant terminals: lead solderable per mil-std-750, method 2026 guaranteed polarity: as marked high temperature soldering guaranteed: 260 o c/10 seconds .25?,(6.35mm) from case. weight: 2.24 grams mounting torque: 5 in ? 1bs. max. ito-220ab dimensions in inches and (millimeters) maximum ratings and electrical characteristics rating at 25 ambient temperature unless otherwise specified. single phase, half wave, 60 hz, resistive or inductive load. for capacitive load, derate current by 20% type number symbol srf 2020 srf 2030 srf 2040 srf 2050 srf 2060 units maximum recurrent peak reverse voltage v rrm 20 30 40 50 60 v maximum rms voltage v rms 14 21 28 35 42 v maximum dc blocking voltage v dc 20 30 40 50 60 v maximum average forward rectified current see fig. 1 i (av) 20.0 a peak forward surge current, 8.3 ms single half sine-wave superimposed on rated load (jedec method ) i fsm 250 a maximum instantaneous forward voltage @ 10.0a v f 0.55 0.70 v maximum d.c. reverse current @ tc=25 at rated dc blocking voltage @ tc=100 i r 1.0 50 ma ma typical thermal resistance (note 1) r jc 1.5 /w typical junction capacitance (note 2) cj 440 300 pf operating junction temperature range t j -65 to +125 -65 to +150 storage temperature range t stg -65 to +150 notes: 1 . thermal resistance from junction to case per leg, with heatsink size (4?x6?x0.25?) al-plate. 2. measured at 1mhz and applied reverse voltage of 4.0v d.c. .272(6.9) .248(6.3) .543(13.8) .512(13.2) .110(2.8) .098(2.5) .606(15.5) .583(14.8) .112(2.85) .100(2.55) .134(3.4)dia .113(3.0)dia
pin 1 pin 3 pin 2
- 143 - ratings and characteristic curves (srf2020 thru SRF2060) fig.3- typical reverse characteristics per leg instantaneous reverse current . (ma) 0 20 40 60 80 100 120 140 .001 .01 .10 1.0 10 percent of rated peak reverse voltage. (%) tj=100 c 0 tj=25 c 0 tj=75 c 0 fig.1- forward current derating curve average for ward current . (a) 0 50 100 150 0 4.0 8.0 12.0 16.0 20.0 case temperature. ( c) o s r f2050-60 srf2020-40 fig.2- maximum non-repetitive peak forward surge current per leg peak for ward surge current . (a) 1 2 5 10 20 100 50 25 50 200 150 100 250 300 number of cycles at 60hz 8.3ms single half sine wave per leg. (jedge method) tj=tj max. fig.4- typical forward characteristics per leg instantaneous for ward current . (a) .2 .3 .4 .5 .6 .7 .8 .9 0.1 1.0 10 100 instantaneous forward voltage. (v) s r f 2 0 5 0 -2 0 6 0 srf2020-2040 tj=25 c pulse width-300 s 1% duty cycle 0 fig.5- typical junction capacitance per leg junction cap acitance.(pf) 0.1 1.0 0.4 4 10 40 80100 100 200 400 600 800 2000 1000 4000 reverse voltage. (v) tj=25 c f=1.0mhz vsig=50mvp-p 0 srf2050-2060 srf2020-2040
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