FR251G - FR257G-STR GLASS PASSIVATED JUNCTION FAST RECOVERY RECTIFIERS PRV : 50 - 1000 Volts Io : 2.5 Amperes D2A FEATURES : * * * * * * 1.00 (25.4) MIN. 0.161 (4.1) 0.154 (3.9) Glass passivated chip High current capability High reliability Low reverse current Low forward voltage drop Fast switching for high efficiency 0.284 (7.2) 0.268 (6.8) 1.00 (25.4) MIN. 0.040 (1.02) 0.0385 (0.98) MECHANICAL DATA : * Case : D2A Molded plastic * Epoxy : UL94V-O rate flame retardant * Lead : Axial lead solderable per MIL-STD-202, Method 208 guaranteed * Polarity : Color band denotes cathode end * Mounting position : Any * Weight : 0.645 gram Dimensions in inches and ( millimeters ) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Rating 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%. RATING SYMBOL FR251G FR252G FR253G FR254G FR255G FR256G FR257G FR257G -STR UNIT Maximum Recurrent Peak Reverse Voltage VRRM 50 100 200 400 600 800 1000 1000 V Maximum RMS Voltage VRMS 35 70 140 280 420 560 700 700 V Maximum DC Blocking Voltage VDC 50 100 200 400 600 800 1000 1000 V Maximum Average Forward Current 0.375"(9.5mm) Lead Length Ta = 75 °C Peak Forward Surge Current, 8.3ms Single half sine wave superimposed on rated load (JEDEC Method) Maximum Peak Forward Voltage at IF = 2.5 A Maximum DC Reverse Current Ta = 25 °C at Rated DC Blocking Voltage Ta = 100 °C IF(AV) 2.5 A IFSM 80 A VF 1.3 V IR 10 µA IR(H) 500 µA Maximum Reverse Recovery Time ( Note 1 ) Trr 150 250 500 250 ns Typical Junction Capacitance ( Note 2 ) CJ 15 pf Junction Temperature Range TJ - 65 to + 150 °C Storage Temperature Range TSTG - 65 to + 150 °C Notes : ( 1 ) Reverse Recovery Test Conditions : IF = 0.5 A, IR = 1.0 A, Irr = 0.25 A. ( 2 ) Measured at 1.0 MHz and applied reverse voltage of 4.0 VDC Page 1 of 2 Rev. 01 : April 17, 2002 RATING AND CHARACTERISTIC CURVES ( FR251G - FR257G-STR ) FIG.1 - REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM 50 Ω Trr 10 Ω + 0.5 D.U.T. + 0 PULSE GENERATOR ( NOTE 2 ) 50 Vdc (approx ) 1Ω - 0.25 OSCILLOSCOPE ( NOTE 1 ) - 1.0 A SET TIME BASE FOR 50/100 ns/cm NOTES : 1. Rise Time = 7 ns max., Input Impedance = 1 megaohm, 22 pF. 1 2. Rise time = 10 ns max., Source Impedance = 50 ohms. 3. All Resistors = Non-inductive Types. FIG.2 - DERATING CURVE FOR OUTPUT RECTIFIED CURRENT FIG.3 - MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT 100 PEAK FORWARD SURGE CURRENT, AMPERES AVERAGE FORWARD OUTPUT CURRENT, AMPERES 2.5 2.0 1.5 1.0 0.5 8.3 ms SINGLE HALF SINE WAVE Ta = 50 °C 80 60 40 20 60Hz RESISTIVE OR INDUCTIVE LOAD 0 0 25 50 75 100 125 150 0 175 1 AMBIENT TEMPERATURE, ( °C) FIG.4 - TYPICAL FORWARD CHARACTERISTICS 4 6 10 20 40 60 100 FIG.5 - TYPICAL REVERSE CHARACTERISTICS 10 100 Pulse W idth = 300 µs 2% Duty Cycle TJ = 100 °C REVERSE CURRENT, MICROAMPERES FORWARD CURRENT, AMPERES 2 NUMBER OF CYCLES AT 60Hz TJ = 25 °C 10 1.0 1.0 0.1 TJ = 25 °C 0.01 0 0.1 20 40 60 80 100 120 14 PERCENT OF RATED REVERSE VOLTAGE, (%) 0.01 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 FORWARD VOLTAGE, VOLTS Page 2 of 2 Rev. 01 : April 2, 2002