BY251 THRU BY255 3.0 AMPS. Silicon Rectifiers Voltage Range 200 to 1300 Volts Current 3.0 Amperes DO-201AD Features Low forward voltage drop High current capability High reliability High surge current capability Mechanical Data Cases: Molded plastic Epoxy: UL 94V-O rate flame retardant Lead: Axial leads, solderable per MILSTD-202, Method 208 guaranteed Polarity: Color band denotes cathode end High temperature soldering guaranteed: 260oC/10 seconds/.375”,(9.5mm) lead lengths at 5 lbs., (2.3kg) tension Weight: 1.2 grams Dimensions in inches and (millimeters) Maximum Ratings and Electrical Characteristics Rating at 25℃ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20% Symbol BY251 BY252 BY253 BY254 BY255 Units Type Number Maximum Recurrent Peak Reverse Voltage 200 400 600 800 1300 V VRRM Maximum RMS Voltage 140 280 420 560 910 V VRMS Maximum DC Blocking Voltage 200 400 600 800 1300 V VDC Maximum Average Forward Rectified Current . 375 (9.5mm) Lead Length @TA = 75℃ Peak Forward Surge Current, 8.3 ms Single Half Sine-wave Superimposed on Rated Load (JEDEC method ) Maximum Instantaneous Forward Voltage @ 3.0A Maximum DC Reverse Current @ TA=25℃ at Rated DC Blocking Voltage @ TA=100℃ Maximum Full Load Reverse Current, Full Cycle Average .375”(9.5mm) Lead Length @TL=75℃ Typical Junction Capacitance ( Note 1 ) Typical Thermal Resistance ( Note 2 ) Operating Temperature Range I(AV) 3.0 A IFSM 150 A VF 1.0 V IR 5.0 100 uA uA HTIR 30 uA Cj 40 40 -65 to +150 -65 to +150 pF ℃/W ℃ ℃ RθJA TJ TSTG Notes: 1. Measured at 1 MHz and Applied Reverse Voltage of 4.0 V D.C. 2. Mount on Cu-Pad Size 16mm x 16mm on P.C.B. Storage Temperature Range - 520 - FIG.1- MAXIMUM FORWARD CURRENT DERATING CURVE 4 3 2 Single Phase Half Wave 60Hz Resistive or Inductive Load 0.375" (9.5mm) Lead Length 1 0 0 25 50 75 100 125 150 175 PEAK FORWARD SURGE CURRENT. (A) AVERAGE FORWARD CURRENT AMPERES RATINGS AND CHARACTERISTIC CURVES (BY251 THRU BY255) FIG.2- MAXIMUM FORWARD SURGE CURRENT 150 100 50 8.3ms Single Half Sine Wave JEDEC Method 10 1 o AMBIENT TEMPERATURE. ( C) 100 JUNCTION CAPACITANCE.(pF) 100 30 10 3 Tj=25oC Pulse Width=300 s 1% Duty Cycle 50 Tj=25 0C 10 5 1 1 0.1 5 10 REVERSE VOLTAGE. (V) 50 100 FIG.5- TYPICAL REVERSE CHARACTERISTICS 0.03 0.6 0.8 1.0 1.2 1.4 FORWARD VOLTAGE. (V) 1.6 1.8 INSTANTANEOUS REVERSE CURRENT. ( A) INSTANTANEOUS FORWARD CURRENT. (A) 100 0.01 0.4 50 FIG.4- TYPICAL JUNCTION CAPACITANCE FIG.3- TYPICAL FORWARD CHARACTERISTICS 1 10 5 NUMBER OF CYCLES AT 60Hz - 521 - 100 Tj=100 0C 1 0.1 Tj=25 0C 0.01 0 20 40 60 80 100 120 PERCENT OF RATED PEAK REVERSE VOLTAGE. (%) 140