LESHAN RADIO COMPANY, LTD. FR251 – FR257P 2.5A 2.5A FAST RECOVERY DIODES TYPE Maximum Peak Reverse Voltage Maximum Average Maximum Rectified Current Forward Peak @ Half-Wave Surge Current @ Resistive Load 60Hz 8.3ms Superimposed I O@ T L PRV A AV V PK FR251 FR252 FR253 FR254 FR255 FR256 FR257 FR257P 50 100 200 400 600 800 1000 1000 2.5 I FM (Surge) ºC 75 Maximum Reverse Current @ PRV @ TA=25ºC I R µAdc A PK 150 5.0 Maximum Forward Voltage @ TA=25ºC I FM A PK 2.5 Maximum Reverse Recovery Time V FM Trr V PK 1.3 Package Dimensions ns 150 150 150 150 250 500 500 250 R–3 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 .042(1.1) DIA .041(1.0) 1.0(25.4) MIN .160(4.1) .138(3.5) .160(4.1) DIA .138(3.5) R-3 19A–1/2 LESHAN RADIO COMPANY, LTD. FR251 – FR257P 2.5A RATING & CHARACTERISTIC CURVES OF 2.5A FAST DIODES FIG.1–TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC FIG. 2 – TYPICAL FORWARD CURRENT DERATING CURVE 10 Ω NONINDUCTIVE +0.5A 1Ω NON. INDUCTIVE Trr (-) D.U.T. (+) 25Vdc (APPROX) (-) AVERAGE FORWARD CURRENT,(A) 2.5 50 Ω NONINDUCTIVE OSCILLOSCOPE (NOTE 1) PULSE G E N E R AT O R (NOTE 2) 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 .1.5 1.0 Single Phase Half Wave 60Hz Resistive or Inductive Load .5 0 0 SET TIME BASE FOR 50/100ns/cm 1cm 25 50 75 100 125 150 175 AMBIENT TEMPER ATURE, (ºC) FIG. 4 – MAXINUM NON-REPETITIVE FOWARD SURGE CURRENT FIG. 3 – TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS PEAK FORWARD SURGE CURRENT,(A) 105 20 TJ =25ºC 3.0 1.0 0.3 75 60 45 30 15 0 1 0.1 2 5 10 20 50 100 NUMBER OF CYCLES AT 60Hz .03 Pulse Width=300µs 1% Duty Cycle FIG. 5 – TYPICAL JUNCTION CAPACITANCE .01 .4 .6 .8 1.0 1.2 1.4 1.6 200 1.8 100 INSTANTANEOUS FORWARD VOLTAGE, (%) 60 JUNCTION CAPACITANCE,(pF) INSTANTANEOUS FOWARD CURRENT (A) 10 8.3ms Single Half Sine-Wave (JEDEC Method) 90 TJ =25ºC 40 20 10 6 4 2 1 .1 .2 .4 1.0 2 4 10 20 40 100 REVERSE VOLTAGE,(V) 19A–2/2