FR257

BL FEATURES L ow cost GALAXY ELECTRICAL FR251---FR257 VOLTAGE RANGE: 50 --- 1000 V CURRENT: 2.5 A FAST RECOVERY RECTIFIER R-3 D iffused junction L ow leakage L ow forward voltage drop H igh current capability Easily cleaned with Freon,Alcohol,Isopropanol and similar solvents The plastic material carries U/L recognition 94V-0 MECHANICAL DATA C ase: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 R atings at 25 a mbient temperature unless otherwise specified. Single phase,half wave,60 Hz,resistive or inductive load. For capacitive load,derate by 20%. FR 251 Maximum recurrent peak reverse voltage Maximum RMS voltage Maximum DC blocking voltage Maximum average forw ard rectified current 9.5mm lead length, @TA=75 FR 252 100 70 100 FR 253 200 140 200 FR 254 400 280 400 2.5 FR 255 600 420 600 FR 256 800 560 800 FR 257 1000 700 1000 UNITS V V V A V RRM V RMS VDC IF(AV) 50 35 50 Peak forw ard surge current 8.3ms single half-sine-w ave superimposed on rated load @TJ =125 IFSM 150.0 A Maximum instantaneous forw ard voltage @ 2.5 A Maximum reverse current at rated DC blocking voltage @TA =25 @TA =100 VF IR t rr CJ RθJA TJ TSTG 150 1.3 5.0 100.0 250 22 35 - 55---- +150 - 55---- + 150 500 V A ns pF ／Ｗ Maximum reverse recovery time (Note1) Typical junction capacitance Typical thermal resistance (Note2) (Note3) Operating junction temperature range Storage temperature range N OTE:1. Measured with I F =0.5A, I R=1A, I rr=0.25A. 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 FIG.1 -- TYPICAL FORWARD DERATING CURVE PEAK FORWARD SURGE CURRENT AMPERES FR251---FR257 FIG.2-- FORWARD SURGE CURRENT AVERAGE FORWARD CURRENT AMPERES 2.5 150 125 100 75 50 25 0 1 2 4 6 8 10 20 40 60 100 TJ=125 8.3ms Single Half Sine-Wave 2.0 1.5 1.0 0.5 Single Phase Half Wave 60HZ Resistive or Inductive Load 0 25 50 75 0 100 125 150 175 AMBIENT TEMPERATURE, FIG.3--TYPICAL JUNCTION CAPACITANCE INSTANTANEOUS FORWARD CURRENT AMPERES NUMBER OF CYCLES AT 60 Hz FIG.4 --TYPICAL FORWARD CHARACTERISTIC 100 10 TJ=25 Pulse Width=300µS 100 JUNCTION CAPACITANCE,pF 60 40 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 20 10 4 TJ=25 f=1MHz 2 1 .1 .2 .4 1.0 2 4 10 20 40 100 REVERSE VOLTAGE,VOLTS INSTANTANEOUS FORWARD VOLTAGE,VOLTS FIG.5 -- REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM 50 N.1. 10 N.1. t rr +0.5A D.U.T. (+) 50VDC (APPROX) (-) 1 N.1. (-) 0 PULSE GENERATOR (NOTE2) OSCILLOSCOPE (NOTE 1) (+) -0.25A - 1.0A 1cm N S:1.R TIM =7ns M IN U IM E AN E OTE ISE E AX. P T P D C =1M .22pF 2.R TIM =10ns M SOU C IM E AN E ISE E AX. R E P D C =5O SE TIM BASEFOR50/100 ns /cm TE www.galaxycn.com Document Number 0261005 BLGALAXY ELECTRICAL 2.