FR251 SYNSEMI | Alldatasheet
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FR251 - FR257-STR FAST RECOVERY RECTIFIER DIODES PRV : 50 - 1000 Volts Io : 2.5 Amperes FEATURES : * High current capability * High surge current capability * High reliability * Low reverse current * Low forward voltage drop * Fast switching for high efficiency 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%. SYMBOL FR251 FR252 FR253 FR254 FR255 FR256 FR257 FR257 -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 = 55 °C Peak Forward Surge Current, 8.3ms Single half sine wave Superimposed on rated load (JEDEC Method) Maximum Peak Forward Voltage at I F = 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 28 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 : January 10, 2004 A A2.5 RATING IF(AV) IFSM 100 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 ( FR251 - FR257 ) 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 60 100 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. 01 : January 10, 2004 60Hz RESISTIVE OR INDUCTIVE LOAD 2.0 1.5 1.0 0.5 2.5 100 10 1.0 100 0.1 0.01 0.01 1.0 0.1 100 1400 20 40 60 120 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 A - 0.25 A - 1.0 A 1 cm
50 Vdc
(approx) OSCILLOSCOPE ( NOTE 1 ) 1 Ω 50 Ω 10 Ω D.U.T. PULSE GENERATOR ( NOTE 2 )