BY254

AXIAL SILASTIC GUARD JUNCTION STANDARD RECTIFIER BY251 THRU BY255 FEATURES • • • • • VOLTAGE RANGE CURRENT 200 to 1300 Volts 3.0 Ampere DO-27 1.0(25.4) MIN. 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 .375(9.5) .335(8.5) .220(5.6) DIA. .197(5.0) 1.0(25.4) MIN. 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 .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 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) Maximum Instantaneous Forward Voltage @ 3.0A Maximum DC Reverse Current at Rated DC Blocking Voltage per element T A = 25℃ TA = 100℃ VRRM VRMS VDC I(AV) IFSM VF IR IR(AV) CJ RθJA TJ TSTG BY251 200 140 200 BY252 400 280 400 BY253 600 420 600 3.0 125 1.1 5.0 50 500 40 30 -55 to +150 -55 to +150 BY254 800 560 800 BY255 1300 910 1300 UNIT Volts Volts Volts Amps Amps Volts µA µA pF ℃/W ℃ ℃ Maximum Full Load Reverse Current, full cycle average 0.375”(9.5mm)lead length at TL=75℃ Typical Junction Capacitance (Note 1) Typical Thermal Resistance (Note 2) Operating Junction Temperature Range Storage Temperature Range 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. E-mail: sales@cnmic.com Web Site: www.cnmic.com AXIAL SILASTIC GUARD JUNCTION STANDARD RECTIFIER BY251 THRU BY255 VOLTAGE RANGE CURRENT 200 to 1300 Volts 3.0 Ampere RATING AND CHRACTERISTIC CURVES BY251 Thur BY255 FIG.1-TYPICAL FORWARD CURRENT DERATING CURVE 3.0 FIG.2-MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT 150 AVERAGE FORWARD CURRENT, PEAK FORWARD SURGE 2.5 125 2.0 CURRENT, (A) 100 8.3ms Single Half Sine-Wave (JEDEC Method) =T T j jmax (A) 1.5 75 50 25 1.0 Single Phase Half Wave 60Hz Resistive or 0.5 0 0 Inductive Load 25 50 75 100 125 150 175 0 1 2 5 8 10 20 50 100 AMBIENT TEMPERATURE, (° C) NUMBER OF CYCLES AT 60 Hz FIG.3-TYPICAL INSTANTANEOUS FORWARD CHARACTERISTICS 100 FIG.4-TYPICAL REVERSE CHARACTERISTICS 20 10 INSTANTANE OUS FORWA RD CURRENT, INS TANTANEOUS REVERSE CURRENT, 10 Tj =100 ° C 1.0 1 (A) (mA) 0.1 0.1 Tj =25 ° C Pulse Width=300us 1% Duty Cycle Tj =25° C 0.01 0 20 40 60 80 100 120 140 0.01 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 INSTANTANEOUS FORWARD VOLTAGE,(V) PERCENT OF RATED PEAK REVERSE VOLTAGE,(%) FIG.5-TYPICAL JUNCTION CAPACITANCE 100 CAPACITANCE,(pF) 10 TJ=25° C F=1MHz 10 0.1 1.0 4.0 10.0 100 REVERSE VOLTAGE,(VOLTS) E-mail: sales@cnmic.com Web Site: www.cnmic.com