BY251 THRU BY255 GENERAL PURPOSE PLASTIC RECTIFIER Reverse Voltage - 200 to 1300 Volts Forward Current - 3.0 Amperes Features Low cost Diffused junction High current capability The plastic material carries U/L recognition 94V-0 Terminals: Axial leads Polarity: Color band denotes cathode Mounting Instruction DIM ENSIONS Min. distance from body to soldering point, 4mm Max. solder temperature, 350 Max. soldering time: 3.5 Sec. Do not bend lead at a point closer than 3mm to the body inches DIM Min. mm Max. Min. Max. 9.50 A 0.283 0.374 7.20 B 0.189 0.208 4.80 5.30 C 0.048 0.051 1.20 1.30 D 1.000 - 25.40 - Maximum Ratings and Electrical Characteristics Symbols BY251 BY252 BY253 BY254 BY255 200 400 600 800 1300 Units Peak repetitive reverse voltage VRRM Forward current at Tamb=50 I(AV) 3.0 Amps Volts 8.3mS peak forward surge current IFSM 100.0 Amps Recurrent peak forward current IFRM 20.0 Amps Maximum forward voltage drop at IF=3.0A VF 1.1 Volts Maximum reverse current at VRRM IR 10.0 A 30.0 /W Maximum thermal resistance (I=10mm) Operating and storage temperature range R JA TJ, TSTG -65 to +150 1 Note RATINGS AND CHARACTERISTIC CURVES 2