BL GALAXY ELECTRICAL 31DF3 --- 31DF4 VOLTAGE RANGE: 300 --- 400 V CURRENT: 1.5 A SUPER FAST RECTIFIERS FEATURES DO - 27 Low cost Diffused junction Low leakage Low forward voltage drop High current capability Easily cleaned with alcohol,Isopropanol and sim ilar solvents MECHANICAL DATA Case:JEDEC DO--27,m olded plastic Terminals: Axial lead ,solderable per MIL-STD-202,Method 208 Polarity: Color band denotes cathode Weight: 0.041ounces,1.15 gram s Mounting position: Any MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 am bient tem perature unless otherwise specified. Single phase,half wave,50Hz,resistive or inductive load. For capacitive load,derate by 20%. 31DF3 31DF4 UNITS Maximum recurrent peak reverse voltage V RRM 300 400 V Maximum RMS voltage VRMS 210 280 V Maximum DC blocking voltage V DC 300 400 V Maximum average forw ard rectified current 9.5mm lead length, @TA =75 IF(AV) 1.5 A IFSM 125.0 A VF 1.25 V Peak forw ard surge current 8.3ms single half-sine-w ave superimposed on rated load @TJ =125 Maximum instantaneous forw ard voltage @ IF=3A Maximum reverse current at rated DC blocking voltage @TA =25 @TA =100 5.0 IR 50.0 A Maximum reverse recovery time (Note1) t rr 30 ns Typical junction capacitance (Note2) CJ 90 pF Typical thermal resistance (Note3) RθJA 34 TJ - 55 ----- + 150 TSTG - 55 ----- + 150 Operating junction temperature range Storage temperature range /W www.galaxycn.com 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. 3. Thermal resistance f rom junction to ambient. Document Number 0264017 BLGALAXY ELECTRICAL 1. RATINGS AND CHARACTERISTIC CURVES 31DF3 --- 31DF4 FIG.1 -- TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC 50 N 1. 10 N 1. t rr + 0 .5A D.U.T. PULSE GENERATOR (NOTE2) (+) 25VDC (approx) (-) 0 -0.25 A OSCILLOSCOPE (NOTE 1) 1 NONINDUCTIVE -1.0A 1cm NOTES:1.RISE TIME = 7ns MAX.INPUT IMPEDANCE =1M . 22pF. JJJJ 2.RISE TIME =10ns MAX.SOURCE IMPEDANCE=50 . SET TIMEBASEFOR10 ns/cm 10 4 2 1 0.4 0.2 0.1 0.04 TJ=25 Pulse Width=300µs 0.02 0.01 0.6 0.8 1.0 1.2 1.4 1.6 FIG.3 -- FORWARD DERATING CURVE AVERAGE FORWARD CURRENT AMPERES INSTANTANEOUS FORWARD CURRENT AMPERES FIG.2 -- TYPICAL FORWARD CHARACTERISTIC 1.8 2.0 1.5 1.0 Single Phase Half Wave 60HZ Resistive or Inductive Load 0.375"(9.5mm)Lead Length 0.5 0 0 INSTANTANEOUS FORWARD VOLTAGE, VOLTS 200 100 60 40 TJ=25 f=1.0MHz 20 10 0.1 0.2 0.4 1 2 4 10 20 40 REVERSE VOLTAGE, VOLTS 100 75 100 125 150 FIG.5-- PEAK FORWORD SURGE CURRENT PEAKFORWORDSURGECURRENT AMPERES JUNCTION CAPACITANCE, pF 600 400 50 AMBIENT TEMPERATURE, FIG.4-- TYPICAL JUNCTION CAPACITANCE 1000 25 150 125 100 75 50 8.3ms Single Half Sine - Wave 25 0 1 5 10 50 100 NUMBER OF CYCLES AT 60HZ www.galaxycn.com Document Number 0264017 BLGALAXY ELECTRICAL 2.