case : do-201ad molded plastic weight : 1.21 gram 3.0a axial leaded super fast rectifier diodes sf31-sf39 1 of 2 features a a b c d maximum ratings and electrical characteristics @ t a = 25 c unless otherwise specified mechanical data single phase, half wave, 60hz, resistive or inductive load. for capacitive load, derate current by 20%. low forward low re verse current high reliability high surge current capability high current capability voltage drop mounting position : any polarity : color band denotes cathode end lead : axial lead solderable per mil-std-202, method 208 guaranteed do-201ad dim min max a 25.40 b 7.20 9.50 c 1.20 1.30 d 4.80 5.30 all dimensions in mm epoxy : ul94v-o rate flame retardant symbol sf31 sf32 sf33 sf34 sf35 sf36 sf37 SF38 sf39 units maximum recurrent peak reverse voltage v rrm 50 100 150 200 300 400 600 800 1000 volts maximum rms voltage v rms 35 70 105 140 210 280 420 560 700 volts maximum dc blocking voltage v dc 50 100 150 200 300 400 600 800 1000 volts maximum average forward current 0.375"(9.5mm) lead length ta = 55 c i f(av) 3.0 amps. peak forward surge current, 8.3ms single half sine wave superimposed on rated load (jedec method) i fsm 125 amps. maximum peak forward voltage at i f = 3.0 a. v f 0.95 1.4 1.7 volts maximum dc reverse current ta = 25 c i r 5 m a at rated dc blocking voltage ta = 100 c i r(h) 50 m a maximum reverse recovery time ( note 1 ) trr 35 ns typical junction capacitance ( note 2 ) c j 50 pf junction temperature range t j - 65 to + 150 c storage temperature range t stg - 65 to + 150 c notes : ( 1 ) reverse recovery test conditions : i f = 0.5 a, i r = 1.0 a, irr = 0.25 a. ( 2 ) measured at 1.0 mhz and applied reverse voltage of 4.0 v dc rating super fast recovery time
fig.1 - reverse recovery ti m e characteristic and test circuit diagram + notes : 1. rise time = 7 ns max., input impedance = 1 megaohm, 22 pf. 2. rise time = 10 ns max., source impedance = 50 ohms. 3. all resistors = non-inductive types. fig.2 - derating curve for output fig.3 - maximum non-repetitive peak rectified current forward surge current 0 25 50 75 100 125 150 175 1 2 4 6 10 20 40 60 100 ambient temper a ture, ( c) number of c y cles at 60hz fig.4 - typical forward charact er istics fig.5 - typical r e v erse characteristics 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 forw ard voltage, volts 60hz resistive or inductive load 2.4 1.8 1.2 0.6 3.0 100 10 1.0 100 0 125 0 75 50 25 0.1 10 80 0.01 0.01 1.0 0.1 100 140 0 20 40 60 120 percent of r at ed re v erse voltage, (%) peak forward surge current, amperes average forward output current, amperes forward current, amperes reverse current, microamperes t j = 25 c t j = 100 c t j = 25 c pulse width = 300 m s 2% duty cycle 8.3 ms single half sine ta = 50 c + 0.5 a 0 - 0.25 - 1.0 a trr 1 cm set time base for 15 ns/cm sf31 - sf34 sf35 - sf36 sf37 - sf39 50 vdc (approx) d.u.t. oscilloscope ( note 1 ) 1 w 50 w 10 w pulse generator ( note 2 ) 2of2
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