BY251 THRU BY255 3.0 AMPS. Silicon Rectifiers Voltage Range 200 to 1300 Volts Current 3.0 Amperes DO-201AD Features a Low forward voltage drop a High current capability a High reliability a High surge current capability Mechanical Data a Cases: Molded plastic a Epoxy: UL 94V-O rate flame retardant a Lead: Axial leads, solderable per MILSTD-202, Method 208 guaranteed a Polarity: Color band denotes cathode end a High temperature soldering guaranteed: 260oC/10 seconds/.375",(9.5mm) lead lengths at 5 lbs., (2.3kg) tension aWeight: 1.2 grams Dimensions in inches and (millimeters) Maximum Ratings and Electrical Characteristics Rating at 25ambient 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 I(AV) 3.0 A IFSM 150 A VF 1.0 V IR 5.0 100 uA uA Maximum Full Load Reverse Current, Full Cycle Average .375"(9.5mm) Lead Length @TL=75 Typical Junction Capacitance ( Note 1 ) HTIR 30 uA Cj Typical Thermal Resistance ( Note 2 ) RJA 50 18 -65 to +150 -65 to +150 pF /W Operating Temperature Range Storage Temperature Range TJ TSTG Notes: 1. Measured at 1 MHz and Applied Reverse Voltage of 4.0 V D.C. 2. Thermal Resistance from Junction to Ambient .375" (9.5mm) Lead Length. - 298 - REV.1 Oct.-2003 4 FIG.1- MAXIMUM FORWARD CURRENT DERATING CURVE FIG.2- MAXIMUM FORWARD SURGE CURRENT 150 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) NON-REPETITIVE 100 50 Tj=25oC 10 1 50 100 NUMBER OF CYCLES AT 60Hz FIG.4- TYPICAL JUNCTION CAPACITANCE FIG.3- TYPICAL FORWARD CHARACTERISTICS 100 JUNCTION CAPACITANCE.(pF) 100 30 10 3.0 Tj=25oC Pulse Width=300 s 1% Duty Cycle 1.0 50 Tj=25 0C 10 5 1 .1 1 5 10 REVERSE VOLTAGE. (V) 50 100 FIG.5- TYPICAL REVERSE CHARACTERISTICS .03 .6 .8 1.0 1.2 1.4 FORWARD VOLTAGE. (V) 1.6 1.8 INSTANTANEOUS REVERSE CURRENT. ( A) INSTANTANEOUS FORWARD CURRENT. (A) 10 5 o AMBIENT TEMPERATURE. ( C) .01 .4 REPETITIVE 8.3ms Single Half Sine Wave JEDEC Method - 299- 100 Tj=100 0C 1.0 .1 Tj=25 0C .01 0 20 40 60 80 100 120 PERCENT OF RATED PEAK REVERSE VOLTAGE. (%) 140