1N4942G-1N4948G Fast Recovery Rectifiers VOLTAGE RANGE: 200 --- 1000 V CURRENT: 1.0 A DO - 41 Features Low cost Glass passivated junction Low leakage Low forward voltage drop High current capability Easily cleaned with Freon,Alcohol,Isopropanol and similar solvents The plastic material carries U/L recognition 94V-0 Mechanical Data Dimensions in millimeters Case:JEDEC DO-41,molded plastic Polarity: Color band denotes cathode Weight: 0.34 grams Mounting position: Any MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 ambient temperature unless otherwise specified. Single phase,half wave,60 Hz,resistive or inductive load. For capacitive load,derate by 20%. 1N 4942G 1N 4944G 1N 4946G 1N 4947G 1N 4948G UNITS Maximum recurrent peak reverse voltage V RRM 200 400 600 800 1000 V Maximum RMS voltage V RMS 140 280 420 560 700 V Maximum DC blocking voltage V DC 200 400 600 800 1000 V Maximum average forw ard rectified current 9.5mm lead length, @TA=75 IF(AV) 1.0 A IFSM 30.0 A VF 1.3 V Peak forw ard surge current 8.3ms single half-sine-w ave superimposed on rated load @TJ =125 Maximum instantaneous forw ard voltage @ 1.0 A Maximum reverse current at rated DC blocking voltage @TA=25 @TA=125 5.0 IR A 100 Maximum reverse recovery time (Note1) t rr Typical junction capacitance (Note2) CJ 12 Typical thermal resistance (Note3) RθJA 55 TJ - 55---- +150 TSTG - 55---- + 150 Operating junction temperature range Storage temperature range 150 250 NOTE:1. Measured with I F =0.5A, I R=1A, I rr=0.25A. 2. Measured at 1.0MHz and applied rev erse v oltage of 4.0V DC. 3. Thermal resistance f rom junction to ambient. http://www.luguang.cn mail:[email protected] 500 ns pF /W 1N4942G-1N4948G Fast Recovery Rectifiers Ratings AND Charactieristic Curves FIG.1 -- REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM 10 N.1. 50 N.1. t rr +0.5A D.U.T. ( - ) 0 PULSE GENERATOR (NOTE2) (+) 50VDC (APPROX) (-) OSCILLOSCOPE (NOTE 1) 1 N.1. -0.25A ( + ) -1.0A SETTIMEBASE FOR 50/100 ns /cm NOTES: 1. RISETIME= 7ns MAX. INPUTIMPEDANCE= 1M . 22PF 2. RISETIME= 10ns MAX. SOURCEIMPEDANCE= 50 FIG.3 -- TYPICAL FORWARD CHARACTERISTICS 1.0 .8 .6 .4. .2 Single Phase Half Wave 60H Z Resistive or Inductive Load 0 25 50 75 100 125 150 175 INSTANTANEOUS FORWARD CURRENT AMPERES AVERAGE FORWARD CURRENT AMPERES FIG.2 --FORWARD DERATING CURVE 50 8.3ms Single Half Sine-Wave 40 30 20 10 0 4 6 8 10 20 10 TJ=25 P u ls e W id th = 3 0 0 µ S 4 2 1 .0 0 .4 0 .2 0 .1 0 .06 0 .04 0 .02 0 .01 0 .6 0 .8 1 .0 1 .2 1 .4 1 .6 1.8 2.0 FIG.5-- TYPICAL JUNCTION CAPACITANCE FIG.4--PEAK FORWARD SURGE CURRENT 2 100 INSTANTANEOUS FORWARD VOLTAGE,VOLTS 40 NUMBER OF CYCLES AT 60 Hz http://www.luguang.cn 60 80 100 JUNCTION CAPACITANCE,pF PEAK FORWARD SURGE CURREN AMPERES AMBIENT TEMPERATURE, 1 1cm 100 60 40 20 10 4 TJ=25 f=1MHz 2 1 .1 .2 .4 1.0 2 4 10 REVERSE VOLTAGE,VOLTS mail:[email protected] 20 40 100