FR251G - FR257G-STR GLASS PASSIVATED JUNCTION FAST RECOVERY RECTIFIERS PRV : 50 - 1000 Volts Io : 2.5 Amperes D2A FEATURES : * * * * * * * Glass passivated chip High current capability High reliability Low reverse current Low forward voltage drop Fast switching for high efficiency Pb / RoHS Free 1.00 (25.4) MIN. 0.161 (4.1) 0.154 (3.9) 0.284 (7.2) 0.268 (6.8) 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 1.00 (25.4) MIN. 0.040 (1.02) 0.0385 (0.98) 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 UNIT -STR 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 IF(AV) 2.5 A IFSM 80 A VF 1.3 V Maximum DC Reverse Current Ta = 25 °C IR 10 µA at Rated DC Blocking Voltage Ta = 100 °C IR(H) 500 µA Maximum Reverse Recovery Time ( Note 1 ) Trr Typical Junction Capacitance ( Note 2 ) CJ 150 15 250 500 250 ns 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. 02 : March 24, 2005 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 cm 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 10 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 Width = 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 80 100 120 140 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. 02 : March 24, 2005