- 148 - sr2020pt thru sr2060pt 20.0 amps. schottky barrier rectifiers voltage range 20 to 60 volts current 20.0 amperes features dual rectifier construction, positive center-tap plastic package has underwriters laboratory flammability classifications 94v-0 metal silicon junction, majority carrier conduction low power loss, high efficiency high current capability, low vf high surge capability epitaxial construction for use in low voltage, high frequency inverters, free wheeling, and polarity protection applications guardring for transient protection high temperature soldering guaranteed: 260 o c/10seconds,0.17?(4.3mm)l ead lengths at 5 lbs., (2.3kg) tension mechanical data cases: jedec to-3p/to-247ad molded plastic terminals: leads solderable per mil-std-750, method 2026 polarity: as marked mounting position: any weight: 0.2 ounce, 5.6 grams to-3p/to-247ad 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 sr 2020pt sr 2030pt sr 2040pt sr 2050pt sr 2060pt 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 at tc=105 i (av) 20 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 (note 3) 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 per leg (note 1) r jc 1.5 /w typical junction capacitance (note 2) cj 600 400 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? x 6? x 0.25? al-plate.. 2. measured at 1 mhz and applied reverse voltage of 4.0v d.c. 3. 300 us pulse width, 2% dut y c y cle
- 149 - ratings and characteristic curves (sr2020pt thru sr2060pt) fig.2- maximum non-repetitive forward surge current per leg peak for ward surge current . (a) 1 2 5 10 20 100 50 100 50 200 150 250 300 number of cycles at 60hz 8.3ms single half sine wave per leg. (jedec method) tj=tj max. fig.4- typical forward characteristics instantaneous for ward current . (a) .2 .3 .4 .5 .6 .7 .8 .9 0.1 1.0 10 100 instantaneous forward voltage. (v) tj=25 c pulse width=300 s 2% duty cycle o SR2050PT thru sr2060pt sr2020pt thru sr2040pt fig.3- typical reverse characteristics per leg instantaneous reverse current milliamperes 0 20 40 60 80 100 120 140 .01 .10 1.0 10 100 percent of rated peak reverse voltage. (%) tj=100 c 0 tj=25 c 0 tj=75 c 0 fig.1- maximum 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 SR2050PT-2060pt sr2020pt-2040pt fig.5- typical junction capacitance per leg capacitance.(pf) .1 .4 1.0 4 10 40 100 100 200 400 600 1000 800 2000 4000 reverse voltage. (v) tj=25 c f=1.0mhz vsig=50mvp-p 0 SR2050PT-2060pt sr2020pt-2040pt
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