FR251G SYNSEMI | Alldatasheet
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FR251G - FR257G-STR GLASS PASSIVATED JUNCTION FAST RECOVERY RECTIFIERS PRV : 50 - 1000 Volts Io : 2.5 Amperes FEATURES : * Glass passivated chip * High current capability * High reliability * Low reverse current * Low forward voltage drop * Fast switching for high efficiency * Pb / RoHS Free 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 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%. SYMBOLFR251GFR252GFR253GFR254GFR255GFR256GFR257G 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 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 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. 02 : March 24, 2005 A A2.5 RATING IF(AV) IFSM 80 D2A 0.040 (1.02) 0.0385 (0.98) 1.00 (25.4) MIN.0.161 (4.1) 0.154 (3.9) 0.284 (7.2) 0.268 (6.8) 1.00 (25.4) MIN. Dimensions in inches and ( millimeters )
RATING AND CHARACTERISTIC CURVES ( FR251G - FR257G-STR ) FIG.1 - REVERSE RECOVERY TIME CHARACTERISTIC AND TEST CIRCUIT DIAGRAM NOTES : 1. Rise Time = 7 ns max., Input Impedance = 1 megaohm, 22 pF. 2. Rise time = 10 ns max., Source Impedance = 50 ohms. 3. All Resistors = Non-inductive Types. FIG.2 - DERATING CURVE FOR OUTPUT FIG.3 - MAXIMUM NON-REPETITIVE PEAK RECTIFIED CURRENT FORWARD SURGE CURRENT 0 25 50 75 100 125 150 175 1 2 4 6 10 20 40 60100 AMBIENT TEMPERATURE, ( °C) NUMBER OF CYCLES AT 60Hz FIG.4 - TYPICAL FORWARD CHARACTERISTICS FIG.5 - TYPICAL REVERSE CHARACTERISTICS FORWARD VOLTAGE, VOLTS Page 2 of 2 Rev. 02 : March 24, 2005 60Hz RESISTIVE OR INDUCTIVE LOAD 2.0 1.5 1.0 0.5 2.5 100 10 1.0 0.1 0.01 0.01 1.0 0.1 1000 20 40 60 PERCENT OF RATED REVERSE VOLTAGE, (%) PEAK FORWARD SURGE CURRENT, AMPERES AVERAGE FORWARD OUTPUT CURRENT, AMPERES FORWARD CURRENT, AMPERES REVERSE CURRENT, MICROAMPERES TJ = 25 °C TJ = 100 °C TJ = 25 °C Pulse Width = 300 µs 2% Duty Cycle 8.3 ms SINGLE HALF SINE WAVE Ta = 50 °C SET TIME BASE FOR 50/100 ns/cm Trr + 0.5 - 0.25 - 1.0 A 1 cm OSCILLOSCOPE ( NOTE 1 ) 1 Ω 50 Ω 10 Ω D.U.T.
50 Vdc
(approx PULSE GENERATOR ( NOTE 2 )