BY251 DC COMPONENTS CO., LTD. THRU RECTIFIER SPECIALISTS R BY255 TECHNICAL SPECIFICATIONS OF SILICON RECTIFIER VOLTAGE RANGE - 200 to 1300 Volts CURRENT - 3.0 Amperes FEATURES * * * * Low cost Low leakage Low forward voltage drop High current capability DO-27 MECHANICAL DATA * * * * * * Case: Molded plastic Epoxy: UL 94V-0 rate flame retardant Lead: MIL-STD-202E, Method 208 guaranteed Polarity: Color band denotes cathode end Mounting position: Any Weight: 1.18 grams MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Ratings at 25 o C ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20%. Dimensions in inches and (millimeters) SYMBOL BY251 BY252 BY253 BY254 BY255 UNITS Maximum Recurrent Peak Reverse Voltage VRRM 200 400 600 800 1300 Volts Maximum RMS Voltage VRMS 140 280 420 560 910 Volts VDC 200 400 600 800 1300 Maximum DC Blocking Voltage Maximum Average Forward Rectified Current .375*(9.5mm) lead length at T L = 105oC Peak Forward Surge Current 8.3 ms single half sine-wave superimposed on rated load (JEDEC Method) Maximum Instantaneous Forward Voltage at 3.0A DC Maximum DC Reverse Current @T A = 25 oC at Rated DC Blocking Voltage @T A = 100 o C Maximum Full Load Reverse Current Average, Full Cycle .375*(9.5mm) lead length at T L = 75oC Typical Junction Capacitance (Note) Typical Thermal Resistance Operating and Storage Temperature Range Volts IO 3.0 Amps I FSM 200 Amps VF 1.1 5.0 500 IR 30 CJ 40 R qJA T J , T STG 30 -65 to + 175 Volts uAmps uAmps pF 0 C/ W 0 C NOTES : Measured at 1 MHZ and applied reverse voltage of 4.0 volts 114 NEXT EXIT BACK NEXT EXI BACK EXIT NEXT BACK RATING AND CHARACTERISTIC CURVES (BY251 THRU BY255) DC COMPONENTS CO., LTD. R 115 NEXT EXIT BACK NEXT EXI BACK EXIT NEXT BACK