CURRENT 2.5 Amperes VOLTAGE 50 to 1000 Volts FR251 THRU FR257 Features · Fast switching · Low leakage · Low forward voltage drop · High current capability · High current surge · High reliability DO-201AD 0.210(5.3) 0.188(4.8) DIA. 1.0(25.4) MIN. 0.375(9.5) 0.285(7.2) Mechanical Data · Case : JEDEC DO-201AD molded plastic body · Terminals : Plated axial lead solderable per MIL-STD-750, method 2026 · Polarity : Color band denotes cathode end · Mounting Position : Any · Weight : 0.041 ounce, 1.18 gram 1.0(25.4) MIN. 0.042(1.1) 0.037(0.9) DIA. Dimensions in inches and (millimeters) 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%) Symbols FR 251 FR 252 FR 253 FR 254 FR 255 FR 256 FR 257 Units Maximum recurrent peak reverse voltage VRRM 50 100 200 400 600 800 1000 Volts Maximum RMS voltage VRMS 35 70 140 280 420 560 700 Volts Maximum DC blocking voltage VDC 50 100 200 400 600 800 1000 Volts Maximum average forward rectified current 0.375"(9.5mm) lead length TA=75℃ I(AV) 2.5 Amps Peak forward surge current 8.3ms single half sine-wave superimposed on rated load (JEDEC) method IFSM 150 Amps VF 1.3 Volts Maximum instantaneous forward voltage at 2.5A Maximum DC reverse current at rated DC blocking voltage Maximum full load reverse current full cycle average. 0.375"(9.5mm) lead length at TL=55℃ 5.0 μA IR 100 Maximum reverse recovery time (Note 1) Trr Typical junction capacitance (Note 2) CJ 60 pF TJ TSTG -65 to +150 ℃ Operating junction and storage temperature range Notes: (1) Test conditions: IF=0.5A, IR=1.0A, Irr=0.25A. (2) Measured at 1MHz and applied reverse voltage of 4.0 Volts. 150 250 500 ns RATINGS AND CHARACTERISTIC CURVES FR251 THRU FR257 FIG.2-MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT 2.5 2.0 PEAK FORWARD SURGE CURRENT(AMPERES) AVERAGE FORWARD CURRENT(A) FIG.1-TYPICAL FORWARD CURRENT DERATING CURVE 1.5 1.0 SINGLE PHASE HALF WAVE 60Hz RESISTIVE OR INDUCTIVE LOAD 0.5 0 0 25 50 75 100 125 150 175 AMBIENT TEMPERATURE ( ℃) 150 8.3m SINGLE HALF SINE WAVE (JEDEC Method) 125 100 75 50 25 FIG.3-TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 0 1 2 4 6 8 10 20 40 60 100 NUMBER OF CYCLES AT 60Hz 10 FIG.4-TYPICAL JUNCTION CAPACITANCE 3 200 100 1 JUNCTION CAPACITANCE(pF) INSTANTANEOUS FORWARD CURRENT(AMPERES) 20 0.3 0.1 TJ=25℃ 0.03 Pulse Width=300mS 1% Duty Cycle 60 40 TJ=25℃ 20 10 6 4 2 0.01 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1 1.8 0.1 0.2 0.4 INSTANTANEOUS FORWARD VOLTAGE (VOLTS) FIG.5-TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC 50W NON INDUCTIVE 10W NON INDUCTIVE +0.5A (+) 25Vdc (APPROX) ( D.U.T. PULSE GENERATOR (NOTE2) Trr 0 -0.25A ) 1W NON INDUCTIVE OSCILLOSCOPE (NOTE1) NOTES: 1.Rise Time=7ns max. input impedance=1 megohm 22pF 2.Rise Time=10ns max. source impedance =50 ohms 1 2 4 REVERSE VOLTAGE. (V) -1.0A 1cm SET TIME BASE FOR 50/100 ns/cm 10 20 40 100