BY251 . . . 255 Series Data Sheet 3.0 Amp MINIATURE PLASTIC SILICON RECTIFIERS Description Mechanical Dimensions JEDEC D0-201AD .285 .375 .190 .210 1.00 Min. .050 typ. Features n LOW COST n DIFFUSED JUNCTION n HIGH CURRENT CAPABILITY n MEETS UL SPECIFICATION 94V-0 BY251 . . . 255 Series Maximum Ratings BY251 BY252 BY253 Units BY254 BY255 Peak Repetitive Reverse Voltage...VRRM 200 400 600 800 1300 Volts RMS Reverse Voltage...VR(rms) 140 280 420 560 910 Volts DC Blocking Voltage...VDC 200 400 600 800 1300 Volts Average Forward Rectified Current...IF(av) TA = 50°C (Note 3) ............................................. 3.0 ............................................... Amps Repetitive Peak Forward Surge Current...IFM ............................................. 2 0 ............................................... Amps Non-Repetitive Peak Forward Surge Current...IFSM @ Rated Current & Temp ............................................. 100 ............................................... Amps Operating & Storage Temperature Range...TJ, TSTRG ........................................ -50 to 150 ......................................... °C Maximum Forward Voltage @ 3.0A...VF ............................................. 1.1 ............................................... Volts Maximum DC Reverse Current...IR ............................................. 1 0 ............................................... µAmps Typical Thermal Resistance...RθJA (Note 2) ............................................. 3 0 ............................................... Electrical Characteristics Page 9-14 °C / W 3.0 Amp MINIATURE PLASTIC SILICON RECTIFIERS Instantaneous Forward Characteristics Forward Current (A) Thermal Resistance (oC/Watt) Thermal Resistance Forward Voltage (V) Lead Length (mm) Forward Current Derating Curve LL = 10mm Resistive Load Amps Peak Forward Surge Current (A) Peak Forward Surge Current TJ = 175°° C PW = 8.3ms BY251 . . . 255 Series Data Sheet Capacitive Load Number of Cycles @ 60 Hz Ambient Temperature (°°C) Ratings at 25 Deg. C ambient temperature unless otherwise specified. Single Phase Half Wave, 60 Hz Resistive or Inductive Load. For Capacitive Load, Derate Current by 20%. NOTES: 1. Measured @ 1 MHz and applied reverse voltage of 4.0V. 2. Thermal Resistance Junction to Ambient, Jedec Method. 3. .375", (9.5mm) lead lengths. Page 9-15