BL GALAXY ELECTRICAL FR251---FR257 VOLTAGE RANGE: 50 --- 1000 V CURRENT: 2.5 A FAST RECOVERY RECTIFIER FEATURES R-3 Low cost Diffused 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 Case:JEDEC R--3,molded plastic Terminals: Axial lead ,solderable per MIL- STD-202,Method 208 Polarity: Color band denotes cathode Weight:0.021 unces,0.58 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%. FR 251 FR 252 FR 253 FR 254 FR 255 FR 256 FR 257 UNITS Maximum recurrent peak reverse voltage V RRM 50 100 200 400 600 800 1000 V Maximum RMS voltage V RMS 35 70 140 280 420 560 700 V Maximum DC blocking voltage VDC 50 100 200 400 600 800 1000 V Maximum average forw ard rectified current 9.5mm lead length, @TA=75 IF(AV) 2.5 A IFSM 150.0 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 @ 2.5 A Maximum reverse current at rated DC blocking voltage @TA =25 @TA =100 5.0 IR 150 250 Maximum reverse recovery time (Note1) t rr Typical junction capacitance (Note2) CJ 22 Typical thermal resistance (Note3) RθJA 35 TJ - 55---- +150 TSTG - 55---- + 150 Operating junction temperature range Storage temperature range A 100.0 NOTE:1. Measured with I F =0.5A, I R=1A, I rr=0.25A. 500 ns pF ／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 0261005 BLGALAXY ELECTRICAL 1. RATINGS AND CHARACTERISTIC CURVES FR251---FR257 FIG.2-- FORWARD SURGE CURRENT PEAK FORWARD SURGE CURRENT AMPERES AVERAGE FORWARD CURRENT AMPERES FIG.1 -- TYPICAL FORWARD DERATING CURVE 2.5 2.0 1.5 1.0 Single Phase Half Wave 60HZ Resistive or Inductive Load 0.5 0 0 25 50 100 75 150 125 175 150 100 75 50 25 0 1 AMBIENT TEMPERATURE, 40 20 10 TJ=25 f=1MHz 2 .4 1.0 2 4 10 20 40 100 INSTANTANEOUS FORWARD CURRENT AMPERES JUNCTION CAPACITANCE,pF 60 .2 4 6 8 10 20 40 60 100 FIG.4 --TYPICAL FORWARD CHARACTERISTIC 100 1 .1 2 NUMBER OF CYCLES AT 60 Hz FIG.3--TYPICAL JUNCTION CAPACITANCE 4 TJ=125 8.3ms Single Half Sine-Wave 125 100 10 TJ=25 Pulse Width=300µS 4 2 1.0 0.4 0.2 0.1 0.06 0.04 0.02 0.01 0.6 0.8 REVERSE VOLTAGE,VOLTS 1.0 1.2 1.4 1.6 1.8 2.0 INSTANTANEOUS FORWARD VOLTAGE,VOLTS FIG.5 -- REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM 50 N.1. t rr 10 N.1. +0.5A D.U.T. ( - ) 0 PULSE GENERATOR (NOTE2) (+) 50VDC (APPROX) (-) 1 N.1. OSCILLOSCOPE (NOTE 1) -0.25A ( + ) -1.0A 1cm NOTES:1.RISETIME=7ns MAX. INPUT IMPEDANCE=1M .22pF SET TIMEBASEFOR50/100 ns /cm 2.RISETIME=10ns MAX. SOURCEIMPEDANCE=5O www.galaxycn.com Document Number 0261005 BLGALAXY ELECTRICAL 2.