BY251 THRU BY255 GENERAL PURPOSE SILICON RECTIFIER Reverse Voltage - 200 to 1300 Volts Forward Current - 3.0 Ampere FEATURES DO-201AD 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 1.0 (25.4) MIN. 0.220 (5.6) 0.197(5.0) DIA. 0.375(9.5) 0.285(7.2) MECHANICAL DATA 1.0 (25.4) MIN. 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 0.052 (1.3) 0.048 (1.2) DIA. Dimensions in inches and (millimeters) 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%. 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 SYMBOLS BY251 BY252 BY253 BY254 BY255 UNITS VRRM VRMS VDC 200 140 200 400 280 400 600 420 600 800 560 800 1300 910 1300 VOLTS VOLTS VOLTS I(AV) 3.0 Amps IFSM 150 Amps VF 1.1 Volts IR 10.0 500 uA CJ RqJA TJ,TSTG 30.0 20.0 -65 to +175 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 2.4 1.8 Single Phase Half Wave 60Hz Resistive or inductive Load 1.2 0.6 0 0 25 50 FIG. 2-MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT £PEAK FORWARD SURGE CURRENT, AMPERES 3.0 75 100 125 150 150 125 100 75 8.3ms SINGLE HALF SINE-WAVE (JEDEC Method) 50 175 25 1 10 AMBIENT TEMPERATURE, C FIG. 4-TYPICAL REVERSE CHARACTERISTICS FIG. 3-TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 1,000 10 1 TJ=25 C PULSE WIDTH=300 ms 1%DUTY CYCLE 0.1 0.01 0.6 0.8 1.0 1.2 1.4 1.5 INSTANTANEOUS REVERSE CURRENT, MICROAMPERES INSTANTANEOUS FORWARD CURRENT,AMPERES 20 100 TJ=150 C 10 TJ=100 C 1 0.1 TJ=25 C 0.01 INSTANTANEOUS FORWARD VOLEAGE, VOLTS 20 40 60 80 TJ=25 C 10 100 10 1 0.1 0.01 0.1 1 10 1 0.1 1.0 10 100 FIG. 6-TYPICAL TRANSIENT THERMAL IMPEDANCE TRANSIENT THERMAL IMPEDANCE, C/W FIG. 5-TYPICAL JUNCTION CAPACITANCE 100 0 PERCENT OF PEAK REVERSE VOLTAGE,% 200 JUNCTION CAPACITANCE, pF 100 NUMBER OF CYCLES AT 60 Hz 100 REVERSE VOLTAGE,VOLTS www.shunyegroup.com t,PULSE DURATION,sec. 100