BY251G THRU BY255G GLASS PASSIVATED 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 BY251G BY252G BY253G BY254G BY255G 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 µA CJ RθJA 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.cn FIG. 1- FORWARD CURRENT DERATING CURVE 3.0 2.4 1.8 Single Phase Half Wave 60Hz Resistive or inductive Load 1.2 0.6 0 0 25 50 75 100 125 150 175 PEAK FORWARD SURGE CURRENT, AMPERES AVERAGE FORWARD RECTIFIED CURRENT, AMPERES RATINGS AND CHARACTERISTIC CURVES BY251G THRU BY255G FIG. 2-MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT 150 125 100 75 8.3ms SINGLE HALF SINE-WAVE (JEDEC Method) 50 25 1 10 AMBIENT TEMPERATURE, C 20 10 1 TJ=25 C PULSE WIDTH=300 µs 1%DUTY CYCLE 0.01 0.6 0.8 1.0 1.2 1.4 1.5 INSTANTANEOUS REVERSE CURRENT, MICROAMPERES INSTANTANEOUS FORWARD CURRENT,AMPERES FIG. 3-TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 0.1 FIG. 4-TYPICAL REVERSE CHARACTERISTICS 1,000 100 TJ=100 C 1 0.1 TJ=25 C 0.01 TJ=25 C 10 1.0 10 TRANSIENT THERMAL IMPEDANCE, C/W JUNCTION CAPACITANCE, pF FIG. 5-TYPICAL JUNCTION CAPACITANCE 0.1 0 20 40 60 80 FIG. 6-TYPICAL TRANSIENT THERMAL IMPEDANCE 100 10 1 0.1 0.01 0.1 1 10 100 REVERSE VOLTAGE,VOLTS 100 PERCENT OF PEAK REVERSE VOLTAGE,% 200 1 TJ=150 C 10 INSTANTANEOUS FORWARD VOLTAGE, VOLTS 100 100 NUMBER OF CYCLES AT 60 Hz t,PULSE DURATION,sec. www.shunyegroup.com.cn 100