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 25°C 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 µA Typical Junction capacitance (Note 1) CJ 40 pF RθJ 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