BY251

BY251 THRU BY255 GENERAL PURPOSE SILICON RECTIFIER Reverse Voltage - 200 to 1300 Volts DO-201AD Forward Current - 3.0 Ampere FEATURES 1.0 (25.4) MIN. 0.220 (5.6) 0.197(5.0) DIA. 0.375(9.5) 0.285(7.2) The plastic package carries Underwriters Laboratory Flammability Classification 94V-0 Construction utilizes void-free molded plastic technique Low reverse leakage High forward surge current capability High temperature soldering guaranteed: 250 C/10 seconds,0.375”(9.5mm) lead length, 5 lbs. (2.3kg) tension MECHANICAL DATA 1.0 (25.4) MIN. 0.052 (1.3) 0.048 (1.2) DIA. Dimensions in inches and (millimeters) Case: JEDEC DO-201AD molded plastic body Terminals: Plated axial leads, solderable per MIL-STD-750, Method 2026 Polarity: Color band denotes cathode end Mounting Position: Any Weight:0.04 ounce, 1.10 grams MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 C ambient temperature unless otherwise specified. Single phase half-wave 60Hz,resistive or inductive load,for capacitive load current derate by 20%. SYMBOLS BY251 BY252 BY253 BY254 BY255 UNITS VOLTS VOLTS VOLTS Amps Maximum repetitive peak reverse voltage Maximum RMS voltage Maximum DC blocking voltage Maximum average forward rectified current 0.375”(9.5mm) lead length at TA=75 C Peak forward surge current 8.3ms single half sine-wave superimposed on rated load (JEDEC Method) Maximum instantaneous forward voltage at 3.0A Maximum DC reverse current TA=25 C at rated DC blocking voltage TA=100 C Typical junction capacitance (NOTE 1) Typical thermal resistance (NOTE 2) Operating junction and storage temperature range VRRM VRMS VDC I(AV) 200 140 200 400 280 400 600 420 600 3.0 800 560 800 1300 910 1300 IFSM VF IR CJ RqJA TJ,TSTG 150 1.1 10.0 500 30.0 20.0 -65 to +175 Amps Volts uA pF C/W C Note:1.Measured at 1MHz and applied reverse voltage of 4.0V D.C. 2.Thermal resistance from junction to ambient at 0.375”(9.5mm)lead length,P.C.B. mounted www.shunyegroup.com RATINGS AND CHARACTERISTIC CURVES BY251 THRU BY255 AVERAGE FORWARD RECTIFIED CURRENT, AMPERES FIG. 1- FORWARD CURRENT DERATING CURVE £PEAK FORWARD SURGE CURRENT, AMPERES 3.0 FIG. 2-MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT 150 2.4 125 1.8 100 1.2 Single Phase Half Wave 60Hz Resistive or inductive Load 75 0.6 50 8.3ms SINGLE HALF SINE-WAVE (JEDEC Method) 0 0 25 50 75 100 125 150 175 25 1 10 100 AMBIENT TEMPERATURE, C NUMBER OF CYCLES AT 60 Hz FIG. 3-TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 20 1,000 10 FIG. 4-TYPICAL REVERSE CHARACTERISTICS INSTANTANEOUS REVERSE CURRENT, MICROAMPERES INSTANTANEOUS FORWARD CURRENT,AMPERES 100 TJ=150 C 1 10 0.1 TJ=25 C PULSE WIDTH=300 ms 1%DUTY CYCLE TJ=100 C 1 0.01 0.6 0.8 1.0 1.2 1.4 1.5 0.1 TJ=25 C 0.01 0 20 40 60 80 100 INSTANTANEOUS FORWARD VOLEAGE, VOLTS PERCENT OF PEAK REVERSE VOLTAGE,% FIG. 5-TYPICAL JUNCTION CAPACITANCE 200 100 TJ=25 C FIG. 6-TYPICAL TRANSIENT THERMAL IMPEDANCE TRANSIENT THERMAL IMPEDANCE, C/W 100 JUNCTION CAPACITANCE, pF 10 10 1 0.1 0.01 0.1 1 10 100 1 0.1 1.0 10 100 REVERSE VOLTAGE,VOLTS t,PULSE DURATION,sec. www.shunyegroup.com