BL GALAXY ELECTRICAL USF31 --- USF34 VOLTAGE RANGE: 50 --- 200 V CURRENT: 3.0 A SUPER FAST RECTIFIER FEATURES DO - 27 Low cost Low leakage Low forward voltage drop High current capability Easily cleaned with alcohol,Isopropanol and similar solvents .217(5.5) .052(1.3) .048(1.2) .193(4.9) The plastic material carries U/L recognition 94V-0 MECHANICAL DATA .374(9.5) Case:JEDEC DO--27,molded plastic .350(8.9) 1.0(25.4)MIN Terminals: Axial lead ,solderable per MIL- STD-202,Method 208 Polarity: Color band denotes cathode Weight: 0.041 ounces,1.15 grams Mounting position: Any 1.0(25.4)MIN MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 ambient temperature unless otherwise specified. Single phase,half wave,60Hz,resistive or inductive load. For capacitive load,derate by 20%. USF31 USF32 USF33 USF34 UNITS Maximum recurrent peak reverse voltage VRRM 50 100 150 200 V Maximum RMS voltage VRMS 35 70 105 140 V Maximum DC blocking voltage VDC 50 100 150 200 V Maximum average forw ard rectified current 9.5mm lead length, @TA=75 IF(AV) 3.0 A IFSM 125.0 A VF 0.92 V Peak forw ard surge current 8.3ms single half-sine-w ave superimposed on rated load @TJ =125 Maximum instantaneous forw ard voltage @ 3.0A Maximum reverse current at rated DC blocking voltage @TA=25 @TA=100 10.0 IR 500.0 A Maximum reverse recovery time (Note1) trr 20 ns Typical junction capacitance (Note2) CJ 20 pF Typical thermal resistance (Note3) RθJA 20 TJ - 55 ----- + 150 TSTG - 55 ----- + 150 Operating junction temperature range Storage temperature range NOTE: 1. Measured with I F=0.5A, I R=1A, I rr=0.25A. /W www.galaxycn.com 2. Measured at 1.0MHz and applied rev erse v oltage of 4.0V DC. 3. Thermal resistance f rom junction to ambient. Document Number 0264030 BLGALAXY ELECTRICAL 1. RATINGS AND CHARACTERISTIC CURVES USF31 --- USF34 FIG.1 -- TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC trr +0.5A 10 N 1. 50 N 1. 0 D.U.T. PULSE GENERATOR (NOTE2) (+) 25VDC (approx) (-) -0 .2 5A OSCILLOSCOPE (NOTE 1) 1 NONINDUCTIVE -1 .0 A 1 cm NOTES:1.RISE TIME = 7ns MAX.INPUT IMPEDANCE = 1M .22pF. JJJJJ2.RISE TIME =10ns MAX.SOURCE IMPEDANCE=50 . SET TIME BASE FOR 10/20 ns/cm TJ=25 P u ls e W id th = 3 0 0 µ s 4 2 1 0 .4 0 .2 0 .1 0 .0 4 0 .0 2 0 .0 1 0 0 .2 0 .4 0 .6 0 .8 1 .0 1 .2 1 .4 INSTANTANEOUS FORWARD VOLTAGE, VOLTS FIG.3 -- FORWARD DERATING CURVE AVERAGE FORWARD CURRENT AMPERES 100 40 20 10 CURRENT, AMPERES INSTANTANEOUS FORWARD FIG.2 -- TYPICAL FORWARD CHARACTERISTIC JUNCTION CAPACITANCE,pF FIG.4 -- TYPICAL JUNCTION CAPACITANCE 60 40 20 10 6 4 TJ=25 f=1.0MHZ 2 1 0.2 0.1 0.4 1 2 4 10 20 40 100 Single Phase Half Wave 60HZ Resistive or Inductive Load 0.375"(9.5mm)Lead Length 5 4 3 2 1 0 0 25 50 75 100 125 150 175 AMBIENT TEMPERATURE, FIG.5 -- PEAK FORWARD SURGE CURRENT PEAK FORWARD SURGE CURRENT, AMPERES 100 z REVERSE VOLTAGE,VOLTS 150 8.3ms Single Half Sine-Wave 125 100 75 50 25 0 1 5 10 50 100 NUMBER OF CYCLES AT 60Hz CURRENT, MICROAMPERES INSTANTANEOUS REVERSE FIG.6 -- TYPICAL REVERSE CHARACTERISTICS 100 T J= 1 5 0 10 T J= 1 0 0 1 .1 T J= 2 5 .0 1 0 20 40 60 80 100 120 140 PERCENT OF RATED PEAK REVERSE VOLTAGE, www.galaxycn.com Document Number 0264030 BLGALAXY ELECTRICAL 2.