BY251 ~ BY255 MEDIUM CURRENT PLASTIC RECTIFIER VOLTAGE 200 to 1300 Volts CURRENT 3.0 Amperes DO-201AD Unit: inch(mm) FEATURES .052(1.3) .048(1.2) 1.0(25.4)MIN. * High current capability. * Plastic package has Underwriters Laboratories Flammability Classification 94V-O * Void-free Plastic in DO-201AD package. * Exceeds environmental standards of MIL-S-19500/228 .375(9.5) * In compliance with EU RoHS 2002/95/EC directives MECHANICALDATA .285(7.2) * Low leakage . * Case: Molded plastic, DO-201AD .210(5.3) .188(4.8) 1.0(25.4)MIN. * Terminals: Axial leads, solderable to MIL-STD-750,Method 2026 * Polarity: Color Band denotes cathode end * Mounting Position: Any * Weight: 0.0395 ounce, 1.122 grams MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25C ambient temperature unless otherwise specified. Resistive or inductive load, 60Hz. PARAMETER SYMBOL BY251 BY252 BY253 BY254 BY255 UNITS Maximum Recurrent Peak Reverse Voltage VR R M 200 400 600 800 1300 V Maximum RMS Voltage VR M S 140 280 420 560 910 V Maximum DC Blocking Voltage VD C 200 400 600 800 1300 V Maximum Average Forward Current .375"(9.5mm) lead length IF (A V ) 3.0 A Peak Forward Surge Current : 8.3ms single half sine-wave superimposed on rated load(JEDEC method) IF S M 100 A Maximum Forward Voltage at 3.0A VF 1.1 V Maximum DC Reverse Current at TJ =25O C Rated DC Blocking Voltage TJ =100O C IR 5.0 1000 A Typical Junction capacitance (Note 1) CJ 40 pF RJ A 15 TJ ,TS T G -55 to +150 Typical Thermal Resistance(Note 2) Operating Junction and Storage Temperature Range O C/W O C NOTES: 1. Measured at 1 MHz and applied reverse voltage of 4.0 volts. 2.Thermal resistance from junction to ambient. 3.Reverse Recovery Test Conditions:I F=0.5A , IR=1.0A ,Irr=0.25A STAD-FEB.27.2009 1 PAGE . 1 BY251 ~ BY255 RATING AND CHARACTERISTIC CURVES 3.0 2.5 2.0 1.5 1.0 SINGLE PHASE HALF WAVE 60Hz RESISTIVE OR INDUCTIVE LOAD .375" (9.5mm) LEAD LENGTH 0.5 0 0 50 100 150 INSTANTANEOUS FORWARD CURRENT, AMPERES AVERAGE FORWARD RECTIFIED CURRENT AMPERES 100 10 1.0 0.1 0 .01 0.5 0.7 0.9 1.1 1.3 1.5 1.7 O AMBIENT TEMPERATURE, C INSTANTANEOUS FORWARD VOLTAGE, VOLTS FIG.1 FORWARD CURRENT DERATING CURVE FIG.2 TYPICAL FORWARD CHARACTERISTICS 120 PEAK FORWARD SURGE CURRENT, AMPERES JUNCTION CAPACITANCE, pF 100 10 1 10 ?.1 100 100 80 60 40 20 0 1 2 6 10 20 40 60 100 NO. OF CYCLES AT 60Hz REVERSE VOLTAGE, VOLTS INSTANTANEOUS REVERSE CURRENT , A FIG.3 TYPICAL JUNCTION CAPACITANCE Fig.4 MAXIMUM NON REPETITIVE PEAK SURGE CURRENT 1000 o 100 TJ = 125 C 10 TJ = 100 OC 1.0 O TJ = 25 C 0.1 20 40 60 80 100 120 140 PERCENTAGE OF PEAK REVERSE VOLTAGE,% Fig.5-TYPICAL REVERSE CHARACTERISTIC STAD-FEB.27.2009 1 PAGE . 2