BY251 BYTES | Alldatasheet
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Technical content
3.0 AMP SILICON RECTIFIERS
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 .375"(9.5mm) Lead Length at Ta=75 C
FEATURES
Peak Forward Surge Current, 8.3 ms single half sine-wave superimposed on rated load (JEDEC method) Maximum Instantaneous Forward Voltage at 3.0A Maximum DC Reverse Current Ta=25 C at Rated DC Blocking Voltage Ta=100 C Typical Junction Capacitance (Note 1) BY251 BY252 BY253 BY254 BY255 UNITS 200 400 600 800 1300 V 200 400 600 800 1300 V 140 280 420 560 910 V 3.0 200 5.0 -65 +150 A V mA mA pF 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. * Low forward voltage drop * High current capability * High reliability * High surge current capability * 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 BY251 BY255THRU 1.0 Typical Thermal Resistance R JA (Note 2)q 30 VOLTAGE RANGE 200 to 1300 Volts CURRENT DO-27 Dimensions in inches and (millimeters) 1.0(25.4) MIN. 1.0(25.4) MIN. .375(9.5) .285(7.2) .052(1.3) .048(1.2) DIA. .220(5.6) .197(5.0) DIA. A
3.0 Amperes
Operating and Storage Temperature Range T , TJ STG C C/W 124
1.0 100 RATING AND CHARACTERISTIC CURVES (BY251 THRU BY255) FIG.3 - TYPICAL REVERSE CHARACTERISTICS REVERSE LEAKAGE CURRENT, ( A) m 0 20 40 60 80 100 120 140 .01 Tj=100 C Tj=25 C 0.1 1.0 .01 CHARACTERISTICS INSTANTANEOUS FORWARD CURRENT,(A) FORWARD VOLTAGE,(V) Pulse Width 300us 1% Duty Cycle 3.0 Tj=25 C FIG.2-TYPICAL FORWARD CURRENT DERATING CURVE AVERAGE FORWARD CURRENT,(A) 0.5 1.0 1.5 2.0 2.5 3.0 Single Phase Half Wave 60Hz Resistive Or Inductive Load 0.375"(9.5mm) Lead Length FIG.4-MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT 100 150 200 250 NUMBER OF CYCLES AT 60Hz 1 10 5 50 100 Tj=25 C 8.3ms Single Half Sine Wave JEDEC method FIG.5-TYPICAL JUNCTION CAPACITANCE REVERSE VOLTAGE,(V) JUNCTION CAPACITANCE,(pF) 140 120 100 .01 .05 .1 .5 1 5 10 50 100 FIG.1-TYPICAL FORWARD 0 20 40 60 80 100 120 140 160 180 200 AMBIENT TEMPERATURE,( C) PEAK FORWARD SURGE CURRENT,(A) PERCENT OF RATED PEAK REVERSE VOLTAGE,(%) 125