VSI, BY251 THRU BY255 3.0 AMPS. SILICON RECTIFIERS Voltage Range 200 to 1300 Volts Current 3.0 Amperes Features @ Low forward voltage drop @ High current capability @ High reliability e High surge current capability Mechanical Data Cases:Molded plastic e Epoxy:UL 94V-0 rate flame retardant e Lead:Axial leads,solderable per MIL-STD-202, Method 208 guaranteed @ Polarity:Color band denotes cathode end e High temperature soldering guaranteed: 250C/10 seconds/.375",(9.5mm) lead lengths at 5 Ibs.,(2.3kg) tension e Weight:1.2 grams .220(5.6) :048(1.2) DIA. DO-201AD 1.0(25.4) MIN. 197(5.0) DIA. Ly 375(9.5) -335(8.5) 1.0(25.4) MIN. 052(1.3)_ | Dimensions in inches and (millimeters) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Rating at 25C ambient temperature unless otherwise specified. Single phase, half wave, 60HZz, resistive or inductive load. For capacitive load, derate current by 20% Type Number BY251 BY252 BY253 BY254 BY255 =| UNITS Maximum Repetitive Peak Reverse Voltage VRRM 200 400 600 800 1300 Vv Maximum RMS Voltage VRMs 140 280 420 560 910 Vv Maximum DC Blocking Voltage Vpc 200 400 600 800 1300 Vv Maximum Average Forward Rectified Current 3.0 A -375"(9.5mm) Lead Length @TA = 75 C IF(AV) . Peak Forward Surge Current, 8.3 ms Single Half Sine-wave Superimposed on Rated Load IFsm A (JEDEC method) 150 Maximum Instantaneous Forward Voltage @3.0A Ve 1.0 Vv Maximun DC Reverse Current @ TA= 25 IR 5.0 uA at Rated DC Blocking Voltage @ TA=100C 100 uA Maximun Full Load Reverse Current, Full A Cycle Average .375"(9.5mm) Lead Length IR 30 u @TL=75 C Typical Junction Capacitance (Note 1) Cy 50 pF Typical Thermal Resistance (Note 2) RoJA 18 c Operating Temperature Range Ts -55 tot125 c Storage Temperature Range TsTG -55 to+150 C NOTES: 1. Measured at 1 MHz and Applied Reverse Voltage of 4.0 Volts D.C. 2.Thermal Resistance from Junction to Ambient .375"(9.5mm) Lead Length.RATING AND CHARACTERISTIC CURVES BY251 THRU BY255 TS, FIG.1- MAXIMUM FORWARD CURRENT DERATING CURVE Single Phase Half Wave 60Hz |___ Resistive or Inductive Load .375"(9.5mm) Lead Length 1 \ AVERAGE FORWARD CURRENT AMPERES ND n 50 75 100 AMBIENT TEMPERA TURE. (C) 0 25 125 150 175 FIG.4-TYPICAL REVERSE CHARACTERISTICS 10 Tj=100C o Tj=25C Pulse Width=300#s 1% Duty Cycle INSTANTANEOUS FORWARD CURRENT.(A) = a So & .01 A 6 8 1.0 1.2 FORWARD VOLTAGE.(V) 14 16 1.8 PEAK FORWARD SURGE CURRENT.(A) INSTANTANEOUS FORWARD CURRENT.(A) = a 3 a = oO S PEAK FORWARD SURGE CURRENT.(A) a o S a o FIG.2- MAXIMUN NON-REPETITIVE FORWARD SURGE CURRENT 8.3ms Single Half Sine-Wave JEDEC Method 5 NUMBER OF CYCLES AT 60Hz FIG.4-TYPICAL JUNCTION CAPACITANCE = 5 10 50 100 REVERSE VOLTAGE.(V) FIG.5- TYPICAL REVERSE CHARACTERISTICS 20 40 60 80 RERCENT OF RATED PEAK REVERSE VOLTAGE.(%) 100 120 140