features low cost glass passivated junction low forward voltage drop high current capability mechanical data case:jed ec do--15,molded plastic terminals: axial lead ,solderable per mil- std-202,method 208 polarity: color band denotes cathode weight: 0.014 ounces,0.39 grams mounting position: any ratings at 25 ambient temperature unless otherwise specified. single phase,half wave,60 hz,resistive or inductive load. for capacitive load,derate by 20%. sf22 sf23 sf24 sf25 sf26 sf27 sf28 units max imu m r e c u r r en t pe a k r e v e r s e v o lt ag e v rrm v max imu m rms v o lt a ge v rms v max imu m dc bl oc kin g v o lt ag e v dc v maximum average forw ard rectif ied current 9.5mm lead length, @t a =75 peak forw ard surge current 8.3ms single half -sine-w ave superimposed on rated load @t j =125 maximum instantaneous forw ard voltage @ 2.0a v f v maximum reverse current @t a =25 at rated dc blocking voltage @t a =125 max imu m r e v e r s e r ec o v e r y t ime ( no t e1 ) t rr ns typical junction capacitance (note2) c j pf typical thermal resistance (note3) r ja /w operating junction temperature range t j storage temperature range t stg 30 1.3 1.7 0.95 60 sf21g - - - sf28g a 5.0 easily cleaned with alcohol,isopropanol and similar solvents i f(av) 3. thermal resistance f rom junction to ambient. a 50 i r i fsm note: 1. measured with i f =0.5a, i r =1a, i rr =0.25a. 2. measured at 1.0mh z and applied rev erse v oltage of 4.0v dc. - 55 ----- + 175 - 55 ----- + 175 35 glass passivated rectifiers sf21 50 100 150 200 300 400 500 600 the plastic material carries u/l recognition 94v-0 voltage range: 50 --- 600 v cur rent: 2.0 a do - 15 20 50.0 a maximum ratings and electrical characteristics 35 70 105 140 210 280 350 420 50 100 150 200 300 400 500 600 2 .0 bl document number 0269033 1. galaxy electrical www.galaxycn.com blgalaxy electrical g g g g g g g g
document number 0269033 2. amperes amperes amperes fig.2 -- typical forward characteristic fig.3 -- forward derating curve z fig.4 -- typical junction capacitance fig.5 -- peak forward surge current ambient temperature, peak forward surge curren t number of cycles at 60hz reverse voltage,volts sf21g - - - sf28g fig.1 -- test circuit diagram and reverse recovery time characteristic average forward current set time base for 10 ns/cm junction capacitance,pf notes:1.rise time = 7ns max.input impedance = 1m .2 2p f. jjjjj 2.rise time =10ns max.source impedance=50 . ratings and characteristic curves instantaneous forward voltage, volts instantaneous forward current t rr -1 .0 a -0 .2 5 a 0 +0.5a 1cm t j =25 1 2 4 6 10 20 40 60 100 200 0.1 0.2 0.4 1 2 4 10 40 100 20 sf25g - sf28g sf21g - SF24G pulse generator (note2) d.u.t. 1 nonin- ductive 50 n 1. 10 n1. oscilloscope (note 1) (+) 25vdc (approx) (-) 0.5 1.0 0 25 50 75 100 125 150 single phase half wave 60h z resistive or inductive load 0.375"(9.5mm)lead length 0 175 1.5 2.0 2.5 3.0 0 20 60 11 0 100 30 5 8.3ms single half sine-wave 50 50 40 10 70 .6 .4 .8 1.0 1.2 1.4 1.6 1.8 0.01 0.1 1 10 100 tj=25 c pulse width=300 s 1% duty cycle o sf21g~SF24G sf25g~sf26g sf27g~sf28g blgalaxy electrical www.galaxycn.com
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