dimensions in inches and (millimeters) sf31 - sf38 3.0 amps. super fast rectifiers do-201ad features high efficiency, low vf high current capability high reliability high surge current capability low power loss. for use in low voltage, high frequency inventor, free wheeling, and polarity protection application mechanical data cases: molded plastic epoxy: ul 94v-0 rate flame retardant polarity: color band denotes cathode 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 sf 31 sf 32 sf 33 sf 34 sf 35 sf 36 sf 37 sf 38 units maximum recurrent peak reverse voltage v rrm 50 100 150 200 300 400 500 600 v maximum rms voltage v rms 35 70 105 140 210 280 350 420 v maximum dc blocking voltage v dc 50 100 150 200 300 400 500 600 v maximum average forward rectified current .375 (9.5mm) lead length @t a = 55 o c i (av) 3.0 a peak forward surge current, 8.3 ms single half sine-wave superimposed on rated load (jedec method ) i fsm 125 a maximum instantaneous forward voltage @ 3.0a v f 0.95 1.3 1.7 v maximum dc reverse current @ t a =25 o c at rated dc blocking voltage @ t a =100 o c i r 5.0 100 ua ua maximum reverse recovery time (note 1) trr 35 ns typical junction capacitance (note 2) cj 80 70 pf typical thermal resistance r ja 35 o c/w operating temperature range t j -65 to +125 o c storage temperature range t stg -65 to +150 o c notes: 1. reverse recovery test conditions: i f =0.5a, i r =1.0a, i rr =0.25a 2. measured at 1 mhz and applied reverse voltage of 4.0 v d.c. 3. mount on cu-pad size 16mm x 16mm on pcb. http://www.luguang.cn mail:lge@luguang.cn
ratings and characteristic curves (sf31 thru sf38) fig.3- maximum non-repetitive forward surge current rofkaep tnerrucegrusdraw )a(. 1 001 02 015 2 50 25 0 50 125 100 75 150 175 number of cycles at 60hz 8.3ms single half sine wave jedec method 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.5- typical forward characteristics instantaneous forward current. (a) 0.4 0.2 0.6 0.8 1.0 1.2 1.6 1.4 0.01 0.1 1 10 100 forward voltage. (v) tj=25 c pulse width=300 s 1% duty cycle o sf31~sf34 sf35~sf36 SF37~sf38 fig.4- typical junction capacitance junction capacitance.(pf) 0.1 0.5 1 52 10 20 50 100 200 500 1000 60 80 100 120 140 160 180 reverse voltage. (v) sf31~sf34 sf35~sf38 40 fig.2- typical reverse characteristics 0 20 40 60 80 100 120 140 0.1 1 10 100 1000 percent of rated peak reverse voltage. (%) tj=100 c 0 tj=25 c 0 instantaneous reverse current .( a) fig.1- derating maximum average forward current average forward current .(a) 0 25 50 100 150 175 125 75 0 0.5 1.5 2.0 3.0 2.5 1.0 ambient temperature. ( c) o single phase half wave 60hz resistive or inductive load 0.375" (9.5mm) lead length sf31 - sf38 3.0 amps. super fast rectifiers ttp.uua.c aieuua.c
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