FR251 RECTRON THRU SEMICONDUCTOR TECHNICAL SPECIFICATION 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 .042 (1.1) DIA. .040 (1.0) 1.0 (25.4) MIN. .160 (4.1) .138 (3.5) .160 (4.1) DIA. .138 (3.5) 1.0 (25.4) MIN. MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS o 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%. Dimensions in inches and (millimeters) MAXIMUM RATINGS (At T A = 25 oC unless otherwise noted) RATINGS SYMBOL FR251 FR252 FR253 FR254 FR255 FR255P FR256 FR257 FR257P UNITS Maximum Recurrent Peak Reverse Voltage VRRM 50 100 200 400 600 600 800 1000 1000 Volts Maximum RMS Voltage VRMS 35 70 140 280 420 420 560 700 700 Volts VDC 50 100 200 400 600 600 800 1000 1000 Volts Maximum DC Blocking Voltage Maximum Average Forward Rectified Current at T A = 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 IO 2.5 Amps I FSM 150 Amps CJ 60 pF T J , T STG -55 to + 150 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 T L = 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 uAmps IR 100 trr 150 250 uAmps 150 500 250 nSec 2002-11 RATING AND CHARACTERISTIC CURVES ( FR251 THRU FR257 ) FIG. 3 - MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT 2.5 PEAK FORWARD SURGE CURRENT, (A) 150 2.0 1.5 1.0 Single Phase Half Wave 60Hz Resistive or Inductive Load .5 0 125 8.3ms Single Half Sine-Wave (JEDEC Method) 100 75 50 25 0 0 25 50 75 100 125 150 175 AMBIENT TEMPERATURE, ( ) 1 2 FIG. 3 - TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 20 10 3.0 TJ = 25 Pulse Width=300uS 1% Duty Cycle 1.0 0.3 0.1 .03 .01 0.4 5 10 20 50 NUMBER OF CYCLES AT 60Hz 100 FIG. 4 - TYPICAL JUNCTION CAPACITANCE JUNCTION CAPACITANCE, (pF) INSTANTANEOUS FORWARD CURRENT, (A) AVERAGE FORWARD CURRENT, (A) FIG. 1 - TYPICAL FORWARD CURRENT DERATING CURVE 200 100 60 40 20 10 TJ = 25 6 4 2 1 0.6 0.8 1.0 1.2 1.4 .1 1.6 1.8 .2 .4 INSTANTANEOUS FORWARD VOLTAGE, (V) 1.0 2 4 10 20 REVERSE VOLTAGE, ( V ) FIG. 5 - TEST CIRCUIT DIAGRAM AND REVERSE RECOVERY TIME CHARACTERISTIC 50 NONINDUCTIVE (+) 25 Vdc (approx) (-) 10 NONINDUCTIVE trr +0.5A (-) D.U.T 0 PULSE GENERATOR (NOTE 2) 1 NONINDUCTIVE OSCILLOSCOPE (NOTE 1) -0.25A (+) -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 40 100