BY251 THRU BY255 3.0 AMP SILICON RECTIFIERS VOLTAGE RANGE 200 to 1300 Volts CURRENT 3.0 Amperes FEATURES * Low forward voltage drop * High current capability * High reliability * High surge current capability DO-27 .220(5.6) .197(5.0) DIA. 1.0(25.4) MIN. MECHANICAL DATA * Case: Molded plastic * Epoxy: UL 94V-0 rate flame retardant * Lead: Axial leads, solderable per MIL-STD-202, method 208 guranteed * Polarity: Color band denotes cathode end * Mounting position: Any * Weight: 1.10 grams .375(9.5) .285(7.2) 1.0(25.4) MIN. .052(1.3) .048(1.2) DIA. Dimensions in inches and (millimeters) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Rating 25 C ambient temperature uniess otherwies specified. Single phase half wave, 60Hz, resistive or inductive load. For capacitive load, derate current by 20%. TYPE NUMBER Maximum Recurrent Peak Reverse Voltage Maximum RMS Voltage Maximum DC Blocking Voltage Maximum Average Forward Rectified Current BY251 BY252 BY253 BY254 BY255 200 140 200 400 280 400 600 420 600 800 560 800 1300 910 1300 UNITS V V V .375"(9.5mm) Lead Length at Ta=75 C Peak Forward Surge Current, 8.3 ms single half sine-wave 3.0 A superimposed on rated load (JEDEC method) Maximum Instantaneous Forward Voltage at 3.0A Maximum DC Reverse Current Ta=25 C 200 1.0 5.0 A V A at Rated DC Blocking Voltage Ta=100 C Typical Junction Capacitance (Note 1) Typical Thermal Resistance RJA (Note 2) Operating and Storage Temperature Range TJ, TSTG 50 40 30 A pF C/W C -65 NOTES: 1. Measured at 1MHz and applied reverse voltage of 4.0V D.C. 2. Thermal Resistance from Junction to Ambient .375" (9.5mm) lead length. 124 +150 RATING AND CHARACTERISTIC CURVES (BY251 THRU BY255) FIG.1-TYPICAL FORWARD FIG.2-TYPICAL FORWARD CURRENT DERATING CURVE AVERAGE FORWARD CURRENT,(A) CHARACTERISTICS 10 3.0 1.0 2.5 2.0 Single Phase 1.5 Half Wave 60Hz Resistive Or Inductive Load 1.0 0.375"(9.5mm) Lead Length 0.5 0 0 20 40 60 80 100 120 140 160 180 200 AMBIENT TEMPERATURE,( C) Tj=25 C Pulse Width 300us 1% Duty Cycle 0.1 .01 FIG.4-MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT .6 .7 .8 .9 1.0 1.1 1.2 1.3 FORWARD VOLTAGE,(V) FIG.3 - TYPICAL REVERSE CHARACTERISTICS PEAK FORWARD SURGE CURRENT,(A) INSTANTANEOUS FORWARD CURRENT,(A) 50 3.0 250 200 150 8.3ms Single Half Tj=25 C Sine Wave 100 JEDEC method 50 0 100 1 5 50 10 100 NUMBER OF CYCLES AT 60Hz FIG.5-TYPICAL JUNCTION CAPACITANCE 140 Tj=100 C JUNCTION CAPACITANCE,(pF) REVERSE LEAKAGE CURRENT, ( A) 10 1.0 Tj=25 C .1 .01 0 120 100 80 60 40 20 0 20 40 60 80 100 120 140 .01 .05 .1 .5 1 REVERSE VOLTAGE,(V) PERCENT OF RATED PEAK REVERSE VOLTAGE,(%) 125 5 10 50 100