LESHAN RADIO COMPANY, LTD. SF21 – SF26 SUPER FAST DIODES TYPE Maximum Peak Reverse Voltage Maximum Average Rectified Current @ Half-Wave Resistive Load 60Hz Maximum Forward Peak Surge Current @ 8.3ms Superimposed IO@ TL I FM (Surge) PRV VPK SF21 SF22 SF23 SF24 SF25 SF26 50 100 150 200 300 400 AAV 2.0 ºC Maximum Reverse Current @ PRV @ TA=25ºC I 55 R µAdc A PK 5.0 75 Maximum Forward Voltage @ TA=25ºC I FM A PK 2.0 V FM Maximum Reverse Recovery Time T rr V PK 0.95 0.95 0.95 0.95 1.25 1.25 Package Dimensions ns DO - 15 35 Trr I F=0.5A, I R=1.0A, I RR=0.25A Trr Test Conditions: I F=0.5A, I R=1.0A, I RR=0.25A 1.0(25.4) MIN .034(0.9) .028(0.7) .300(7.6) .230(5.8) 1.0(25.4) MIN DIA .140(3.6) DIA .104(2.6) DO – 15 8A–1/2 LESHAN RADIO COMPANY, LTD. SF21-SF26 RATING AND CHARACTERISTIC CURVES OF SUPER FAST DIODES FIG.1-TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC +0.5A (-) D.U.T. 1Ω NON. INDUCTIVE Trr PULSE G E N E R AT O R (NOTE 2) OSCILLOSCOPE (NOTE 1) 0 -0.25A (+) NOTES:1.Rise Time=7ns max. Input Impedance=1megohm.22pF. 2.Rise Time=10ns max. Source Impedance=50 ohms. -1.0A 2.0 1.0 Single Phase Half Wave 60Hz Resistive or Inductive Load 25 1cm SET TIME BASE FOR 10 ns/cm 50 75 100 125 150 175 AMBIENT TEMPER ATURE, (ºC) FIG. 4 - TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS FIG. 3 - TYPICAL REVERSE CHARACTERISTICS 100 10 INSTANTANEOUS FORWARD CURRENT, (A) 10 TJ =100ºC 1.0 TJ =25ºC 0.1 TJ =25ºC 1.0 .1 .01 Pulse Width=300µs 1% Duty Cycle .01 20 40 60 80 100 SF2 6 TJ =150ºC SF2 5~ INSTANTANEOUS REVERSE CURRENT (µA) 3.0 SF2 1~S F24 (+) 25Vdc (APPROX) (-) 10 Ω NONINDUCTIVE AVERAGE FORWARD CURRENT,(A) 50 Ω NONINDUCTIVE FIG. 2 - TYPICAL FORWARD CURRENT DERATING CURVE .001 120 .2 PERCENT OF RATED PEAK REVERSE VOLTAGE, (%) .4 .6 .8 1.0 1.2 1.4 INSTANTANEOUS FORWARD VOLTAGE,(V) FIG. 5 - MAXINUM NON-REPETITIVE FOWARD SURGE CURRENT FIG. 6 - TYPICAL JUNCTION CAPACITANCE 8.3msSingleHalfSine-Wave (JEDECMethod) 75 200 100 60 JUNCTION CAPACITANCE,(pF) PEAK FORWARD SURGE CURRENT,(A) 90 50 45 30 15 60 SF21¡«S F24 40 20 SF25¡«S F26 10 TJ=25¡æ 6 4 2 1 1 2 5 10 20 NUMBER OF CYCLES AT 60Hz 50 100 .1 .2 .4 1.0 2 4 10 20 40 100 REVERSE VOLTAGE,(V) 8A–2/2