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| RECTRON SEMICONDUCTOR TECHNICAL SPECIFICATION FR251 THRU FR257 FAST RECOVERY RECTIFIER VOLTAGE RANGE 50 to 1000 Volts CURRENT 2.5 Amperes FEATURES * * * * * * Fast switching Low leakage Low forward voltage drop High current capability High current surge High reliability R-3 MECHANICAL DATA * * * * * Case: Molded plastic Epoxy: Device has UL flammability classification 94V-O Lead: MIL-STD-202E method 208C guaranteed Mounting position: Any Weight: 0.54 gram 1.0 (25.4) MIN. .042 (1.1) DIA. .040 (1.0) .160 (4.1) .138 (3.5) .160 (4.1) DIA. .138 (3.5) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 C ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20%. o 1.0 (25.4) MIN. Dimensions in inches and (millimeters) MAXIMUM RATINGS (At TA = 25 oC unless otherwise noted) RATINGS Maximum Recurrent Peak Reverse Voltage Maximum RMS Voltage Maximum DC Blocking Voltage Maximum Average Forward Rectified Current at TA= 75 oC Peak Forward Surge Current 8.3 ms single half sine-wave superimposed on rated load (JEDEC method) Typical Junction Capacitance (Note 2) Operating and Storage Temperature Range SYMBOL VRRM VRMS VDC IO IFSM CJ TJ, TSTG FR251 FR252 FR253 FR254 FR255 FR255P FR256 FR257 FR257P UNITS 50 35 50 100 70 100 200 140 200 400 280 400 600 420 600 2.5 150 60 -65 to + 150 600 420 600 800 560 800 1000 700 1000 1000 700 1000 Volts Volts Volts Amps Amps pF 0 C ELECTRICAL CHARACTERISTICS (At TA = 25oC unless otherwise noted) CHARACTERISTICS Maximum Instantaneous Forward Voltage at 2.5A DC Maximum DC Reverse Current at Rated DC Blocking Voltage TA = 25 oC Maximum Full Load Reverse Current Average, Full Cycle .375" (9.5mm) lead length at TL = 55 oC Maximum Reverse Recovery Time (Note 1) NOTES : 1. Test Conditions: IF = 0.5A, IR = -1.0A, IRR = -0.25A 2. Measured at 1 MHZ and applied reverse voltage of 4.0 volts SYMBOL VF FR251 FR252 FR253 FR254 FR255 FR255P FR256 FR257 FR257P UNITS 1.3 Volts 5.0 IR 100 trr 150 250 150 500 250 uAmps nSec 2001-5 uAmps RATING AND CHARACTERISTIC CURVES ( FR251 THRU FR257 ) FIG. 1 - TYPICAL FORWARD CURRENT DERATING CURVE AVERAGE FORWARD CURRENT, (A) FIG. 3 - MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT 150 PEAK FORWARD SURGE CURRENT, (A) 2.5 2.0 1.5 1.0 .5 0 Single Phase Half Wave 60Hz Resistive or Inductive Load 125 100 75 50 25 0 8.3ms Single Half Sine-Wave (JEDEC Method) 0 25 50 75 100 125 150 175 AMBIENT TEMPERATURE, ( ) FIG. 3 - TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS JUNCTION CAPACITANCE, (pF) 1 2 5 10 20 50 NUMBER OF CYCLES AT 60Hz 100 INSTANTANEOUS FORWARD CURRENT, (A) FIG. 4 - TYPICAL JUNCTION CAPACITANCE 200 100 60 40 20 10 6 4 2 1 .1 .2 .4 1.0 2 4 10 20 REVERSE VOLTAGE, ( V ) 40 100 TJ = 25 20 10 3.0 1.0 0.3 0.1 .03 .01 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 TJ = 25 Pulse Width=300uS 1% Duty Cycle INSTANTANEOUS FORWARD VOLTAGE, (V) FIG. 5 - TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC 50 NONINDUCTIVE 10 NONINDUCTIVE trr +0.5A (-) (+) 25 Vdc (approx) (-) D.U.T 0 PULSE GENERATOR (NOTE 2) -0.25A 1 NONINDUCTIVE OSCILLOSCOPE (NOTE 1) (+) -1.0A NOTES:1 Rise Time = 7ns max. Input Impedance = 1 megohm. 22pF. 2. Rise Time = 10ns max. Source Impedance = 50 ohms. 1cm SET TIME BASE FOR 50/100 ns/cm RECTRON |
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