TH09/2479 TH97/2478 IATF 0113686 SGS TH07/1033 www.eicsemi.com BY251 - BY255 SILICON RECTIFIER DIODES DO - 201AD PRV : 200 - 1300 Volts Io : 3.0 Amperes FEATURES : * * * * * * High current capability High surge current capability High reliability Low reverse current Low forward voltage drop Pb / RoHS Free 1.00 (25.4) MIN. 0.208 (5.30) 0.374 (9.50) 0.283 (7.20) MECHANICAL DATA : 1.00 (25.4) MIN. 0.050 (1.28) 0.048 (1.22) * Case : DO-201AD Molded plastic * Epoxy : UL94V-O rate flame retardant * Lead : Axial lead solderable per MIL-STD-202, Method 208 guaranteed * Polarity : Color band denotes cathode end * Mounting position : Any * Weight : 0.929 grams Dimensions in inches and ( millimeters ) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Rating at 25 C ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20%. RATING SYMBOL BY251 BY252 BY253 BY254 BY255 UNIT Maximum Repetitive Peak Reverse Voltage VRRM 200 400 600 800 1300 V Maximum RMS Voltage VRMS 140 280 420 560 910 V Maximum DC Blocking Voltage VDC 200 400 600 800 1300 V Maximum Average Forward Current IF 3.0 A IFSM 100 A VF 1.1 V IR 20 A IR(H) 50 A CJ 50 pF RJA TJ 18 C/W Junction Temperature Range - 65 to + 175 C Storage Temperature Range TSTG - 65 to + 175 C 0.375"(9.5mm) Lead Length Ta = 50 C Peak Forward Surge Current 8.3ms Single half sine wave Superimposed on rated load (JEDEC Method) Maximum Forward Voltage at IF = 3.0 Amps. Ta = 25 C Maximum DC Reverse Current at rated DC Blocking Voltage Ta = 100 C Typical Junction Capacitance (Note1) Typical Thermal Resistance (Note2) Notes : (1) Measured at 1.0 MHz and applied reverse voltage of 4.0VDC (2) Thermal resistance from Junction to Ambient at 0.375" (9.5mm) Lead Lengths, P.C. Board Mounted. Page 1 of 2 Rev. 03: October 8, 2012 TH09/2479 TH97/2478 www.eicsemi.com IATF 0113686 SGS TH07/1033 RATING AND CHARACTERISTIC CURVES ( BY251 - BY255 ) FIG.1 - DERATING CURVE FOR OUTPUT RECTIFIED CURRENT FIG.2 - MAXIMUM NON-REPETITIVE PEAK FORWARD SURGE CURRENT 100 PEAK FORWARD SURGE CURRENT, AMPERES AVERAGE FORWARD OUTPUT CURRENT, AMPERES 3.0 2.4 1.8 1.2 0.6 Ta = 25 C 80 60 40 20 NON-REPETITIVE 0 0 25 50 75 100 125 150 01 175 AMBIENT TEMPERATURE, ( C) FORWARD CURRENT, AMPERES 10 Pulse Width = 300 s 2% Duty Cycle 1.0 TJ = 25 C 4 6 10 20 40 60 100 FIG 4 . - TYPICAL JUNCTION CAPACITANCE JUNCTION CAPACITANCE, (pF) FIG.3 - TYPICAL FORWARD CHARACTERISTICS 100 2 NUMBER OF CYCLES AT 60Hz 100 TJ = 25 C 50 10 5 1 1 2 4 10 20 40 100 REVERSE VOLTAGE, VOLTS 0.1 FIG. 5 - TYPICAL REVERSE CHARACTERISTICS 0.01 0 10 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 REVERSE CURRENT, MICROAMPERES Ta = 100 C FORWARD VOLTAGE, VOLTS 1.0 0.1 Ta = 25 C 0.01 0 20 40 60 80 100 120 140 PERCENT OF RATED REVERSE VOLTAGE, (%) Page 2 of 2 Rev. 03: October 8, 2012