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pin 1 pin 3 pin 2 SRF2020 thru srf2060 isolation 20.0 amps. schottky barrier rectifiers voltage range 20 to 60 volts current 20.0 amperes f eatures low forward voltage drop high current capability high reliability high surge current capability m echanical 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 so ldering 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) m aximum 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 unit s 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 appl ied reverse voltage of 4.0v d.c.
- 183 - 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 0 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 50 -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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