- 146 - 2 4 SRAS2035 thru sras2045 20.0 amps. schottky barrier rectifiers voltage range 35 to 45 volts current 20.0 amperes features for surface mounted application low forward voltage drop high current capability high reliability high surge current capabilit y mechanical data cases: d 2 pak molded plastic epoxy: ul 94v-0 rate flame retardant terminals: lead solderable per mil-std-202, method 208 guaranteed polarity: as marked high temperature soldering guaranteed: 260 o c/10 seconds at terminals weight: 1.70 grams d 2 pak 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 SRAS2035 sras2040 sras2045 units maximum recurrent peak reverse voltage v rrm 35 40 45 v maximum rms voltage v rms 25 28 32 v maximum dc blocking voltage v dc 35 40 45 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 350 a maximum instantaneous forward voltage @ 20.0a @ 40.0a v f 0.57 0.73 v maximum d.c. reverse current @ tj=25 at rated dc blocking voltage @ tj=125 i r 2.7 105 ma ma typical thermal resistance (note 1) r jc 1.5 /w typical junction capacitance (note 2) pf 900 pf operating junction temperature range t j -65 to +150 storage temperature range t stg -65 to +150 notes: 1 . thermal resistance from junction to case per leg. 2. measured at 1mhz and applied reverse volta g e of 5.0v d.c.
- 147 - ratings and characteristic curves (SRAS2035 thru sras2045) 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 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) 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 10 100 100 1,000 5,000 reverse voltage. (v) tj=25 c f=1.0mhz vsig=50mvp-p 0 fig.2- maximum non-repetitive forward surge current per bridge element peak for ward surge current . (a) 1 234 1.5 5 6 9 8 710 25 20 15 30 100 60 40 80 20 100 300 400 200 number of cycles at 60hz
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