AXIAL SILASTIC GUARD JUNCTION STANDARD RECTIFIER VOLTAGE RANGE CURRENT BY251 THRU BY255 200 to 1300 Volts 3.0 Ampere DO-27 FEATURES • • • • • Low coat construction Low forward voltage drop Low reverse leakage High forward surge current capability High temperature soldering guaranteed: 260℃/10 secods/.375”(9.5mm)lead length at 5 lbs(2.3kg) tension 1.0(25.4) MIN. .375(9.5) .335(8.5) .220(5.6) DIA. .197(5.0) MECHANICAL DATA • • • • • • Case: Transfer molded plastic Epoxy: UL94V-O rate flame retardant Polarity: Color band denotes cathode end Lead: Plated axial lead, solderable per MIL-STD-202E method 208C Mounting position: Any Weight: 0.042 ounce, 1.19 grams 1.0(25.4) MIN. .052(1.3) DIA. .048(1.2) Dimensions in inches and (millimeters) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS • • • Ratings at 25OC ambient temperature unless otherwise specified Single Phase, half wave, 60Hz, resistive or inductive load For capacitive load derate current by 20% SYMBOLS VRRM VRMS VDC Maximum Repetitive Peak Reverse Voltage Maximum RMS Voltage Maximum DC Blocking Voltage Maximum Average Forward Rectified Current 0.375”(9.5mm) lead length at T A= 75℃ Peak Forward Surge Current 8.3mS single half sine wave superimposed on rated load (JEDEC method) BY251 200 140 200 BY252 400 280 400 BY253 600 420 600 BY254 800 560 800 BY255 1300 910 1300 UNIT Volts Volts Volts I(AV) 3.0 Amps IFSM 125 Amps VF 1.1 5.0 50 Volts IR(AV) 500 µA CJ 40 pF Typical Thermal Resistance (Note 2) RθJA 30 ℃/W Operating Junction Temperature Range TJ TSTG -55 to +150 -55 to +150 ℃ Maximum Instantaneous Forward Voltage @ 3.0A Maximum DC Reverse Current at Rated DC Blocking Voltage per element TA = 25℃ TA = 100℃ Maximum Full Load Reverse Current, full cycle average 0.375”(9.5mm)lead length at TL=75℃ Typical Junction Capacitance (Note 1) Storage Temperature Range IR Notes: 1. Measured at 1.0MHz and Applied Reverse Voltage of 4.0V DC. 2. Thermal Resistance from junction to ambient at .375”(9.5mm) lead length, P.C.board mounted. Web Site: www.hkmic.com µA ℃ AXIAL SILASTIC GUARD JUNCTION STANDARD RECTIFIER VOLTAGE RANGE CURRENT BY251 THRU BY255 200 to 1300 Volts 3.0 Ampere RATING AND CHRACTERISTIC CURVES BY251 Thur BY255 FIG.1-TYPICAL FORWARD CURRENT DERATING CURVE FIG.2-MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT 150 2.0 1.5 1.0 Single Phase Half Wave 60Hz 0.5 Resistive or 125 CURRENT, (A) PEAK FORWARD SURGE 2.5 (A) AVERAGE FORWARD CURRENT, 3.0 8.3ms Single Half Sine-Wave (JEDEC Method) =T T j jmax 100 75 50 25 Inductive Load 0 0 25 100 75 50 150 125 0 175 1 5 2 8 20 10 50 100 NUMBER OF CYCLES AT 60 Hz AMBIENT TEMPERATURE, (° C) FIG.3-TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS FIG.4-TYPICAL REVERSE CHARACTERISTICS 100 1 (A) INSTANTANEOUS FORWARD CURRENT, 10 0.1 Tj =25° C Pulse Width=300us 1% Duty Cycle 10 Tj =100° C 1.0 (mA) INSTANTANEOUS REVERSE CURRENT, 20 0.01 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0.1 Tj =25° C 0.01 2.0 0 INSTANTANEOUS FORWARD VOLTAGE,(V) 20 40 60 80 PERCENT OF RATED PEAK REVERSE VOLTAGE,(%) FIG.5-TYPICAL JUNCTION CAPACITANCE CAPACITANCE,(pF) 100 10 TJ=25° C F=1MHz 10 0.1 1.0 4.0 10.0 100 REVERSE VOLTAGE,(VOLTS) Web Site: www.hkmic.com 100 120 140