dimensions in inches and (millimeters) do-201ad features high efficiency, low vf high current capability high reliability high surge current capability low power loss. mechanical data cases: molded plastic epoxy: ul 94v-0 rate flame retardant polarity: color band denotes cathode end high temperature soldering guaranteed: 260 o c/10 seconds/.375?,(9.5mm) lead lengths at 5 lbs., (2.3kg) tension weight: 1.2 grams maximum ratings and electrical characteristics rating at 25 o c 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 31df4 31DF6 units maximum recurrent peak reverse voltage v rrm 400 600 v maximum rms voltage v rms 280 420 v maximum dc blocking voltage v dc 400 600 v maximum average forward rectified current .375 (9.5mm) lead length @t a = 29 o c (note 1) @t l = 109 o c i (av) 1.2 3.0 a peak forward surge current, 8.3 ms single half sine-wave superimposed on rated load (jedec method ) i fsm 45 a maximum instantaneous forward voltage @ 3.0a v f 1.7 v maximum dc reverse current @ t a =25 o c at rated dc blocking voltage @ t a =125 o c i r 20 100 ua maximum reverse recovery time (note 3) trr 35 ns typical thermal resistance ( note 2 ) r ja 80 o c/w operating temperature range t j -40 to +150 o c storage temperature range t stg -40 to +150 o c notes: 1. without fin or p.c.board.. 2. thermal resistance from junction to ambient .375? (9.5mm) lead length. 3. reverse recovery test condition: ta = 25 , ifm=3a, di/dt = 50a / us. 31df4-31DF6 3.0 amp. super fast rectifiers http://www.luguang.cn mail:lge@luguang.cn
0 20 40 60 80 100 120 140 percent of rated peak reverse voltage. (%) fig.1- maximum forward current derating curve 175 single phase half wave 50 hz inductive load 0.375" (9.5mm) lead length average forward rectified current amperes lead temperature. ( c) o 0 0 25 50 75 100 125 150 1 2 3 4 fig.3- maximum non-repetitive forward surge current tj=25 c 0 8.3ms single half sine wave jedec method 1 10 5 10 50 100 50 100 200 peak forward surge current. (a) number of cycles at 60 hz 40 30 20 20 2 3 30 80 8 fig.2- typical forward characteristics instantaneous forward current. (a) 1.4 0.01 0.03 0.1 0.3 1 3 10 30 100 1.5 tj=25 c pulse width=300 s 1% duty cycle o forward voltage. (v) 1.6 1.8 2.0 2.1 1.7 1.9 ratings and characteristic curves (31df4 thru 31DF6) fig.6- reverse recovery time characteristic and test circuit diagram 50 noninductive non inductive oscilloscope (note 1) pulse generator (note 2) dut (+) 50vdc (approx) (-) notes: 1. rise time=7ns max. input impedance= 1 megohm 22pf 2. rise time=10ns max. sourse impedance= 50 ohms (-) (+) 10 noninductive -1.0a -0.25a 0 +0.5a trr 1cm set time base for 5/ 10ns/ cm fig.4- typical reverse characteristics 0.1 1 10 100 fig.5- typical junction capacitance junction capacitance.(pf) 0.1 0.5 1 52 10 20 50 100 200 500 1000 40 60 80 100 120 140 reverse voltage. (v) tj=25 c 0 1000 tj=25 c 0 tj=125 c 0 160 180 instantaneous reverse current .( a) 31df4-31DF6 3.0 amp. super fast rectifiers http://www.luguang.cn mail:lge@luguang.cn
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