skn7 - skn9 surface mount schottky barrier rectifiers prv : 20 - 40 volts i o : 1.0 am p ere features : * high current capability * high surge current capability * high reliability * high efficiency * low power loss * low cost * low forward voltage drop * pb / rohs free mechanical data : * case : sma molded plastic * epoxy : ul94v-o rate flame retardant * lead : lead formed for surface mount * polarity : color band denotes cathode end * mounting position : any * weight : 0.067 gram maximum ratings and electrical characteristic s rating 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%. symbol skn7 skn8 skn9 unit maximum recurrent peak reverse voltage v rrm 20 30 40 v maximum rms voltage v rms 14 21 28 v maximum dc blocking voltage v dc 20 30 40 v maximum average forward current t l = 90 c i f(av ) 1.0 a maximum peak forward surge current, 8.3ms single half sine wave superimposed on rated load (jedec method) maximum forward voltage at i f = 1.0 a v f 0.45 0.55 0.6 volt. maximum reverse current ta = 25 c i r 1.0 ma at rated dc blocking voltage (note 1) ta = 100 c i r(h) 10 ma typical junction capacitance (note 2) c j 110 pf junction temperature range t j - 65 to + 125 c storage temperature range t stg - 65 to + 125 c notes : (1) pulse test : pulse width = 300 s, duty cycle = 2%. (2) measured at 1 mhz and applied reverse voltage of 4.0 volts. page 1 of 2 rev. 02 : march 25, 2005 rating i fsm 25 a 2.1 0.2 sma (do-214ac) 1.2 0.2 5.0 0.15 4.5 0.15 2.6 0.15 dimensions in millimeters 1.1 0.3 0.2 0.07 2.0 0.2 certificate : th97/10561qm certificate : tw00/17276em
rating and characteristic curves ( skn7 - skn9 ) fig.1 - forward current derating curve fig.2 - maximum non-repetitive peak forward surge current 20 40 60 80 100 120 140 1 2 4 6 10 20 40 60 100 lead temperature, ( c) number of cycles at 60hz fig.3 - typical forward characteristics fig.4 - typical reverse characteristics 0.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 page 2 of 2 rev. 02 : march 25, 2005 skn9 0.8 0.6 0.4 0.2 1.0 20 0 25 0 15 10 5 1.0 0.1 10 peak forward surge current, amperes average forward current, amperes forward current, amperes 10 1.0 80 0.01 0.1 100 140 0 20 40 60 120 percent of rated reverse voltage, (%) t j = 100 c t j = 25 c reverse current, milliamperes forward voltage, volts 20 skn7 skn8 t j = 25 c pulse width = 300 s duty cycle = 1% 0 certificate : th97/10561qm certificate : tw00/17276em
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