BY251S...BY255S iti Rectifiers Silicon | | _ Millimeters Nominal forward current 3A c Dim. Min. Max. Repetitive peak reverse voltage 200...1300V | | A 8.38 8.89 in rectifiers in plastic case 17-02 are designated by ! ~ B 3.30 3.68 SUITIX 9. ' ee] Cathode 1 Mark Cc 25.40 31.75 ; > D 0.94 1.09 These rectifiers are delivered taped. Plastic package 17-02 Weight approx. 0.6 g Absolute Maximum Ratings Symbol Value Unit Repetitive Peak Reverse Voltage BY251S Var 200 Vv BY252S VRRM 400 V BY253S VRRM 600 Vv BY254S VaRM 800 V BS255S VRRM 1300 V Nominal Current at Halfe Wave Rectification leav 31) A with Resistive Load at Tamp = 50 C Repetitive Peak Forward Currentat <40,f> 15HZ, Tamp = 25C lrAM 201) Surge Forward Current, Half Cycle 50 Hz, starting from T; = 25 C lFsm 100 Junction Temperature T; 125 C Ambient Operating Temperature Range Tamb 40 to + 125 C Storage Temperature Range . Ts 40 to + 125 C 1) Valid provided that leads are kept at ambient temperature at a distance of 10 mm from case. 2 = 4642711 0003884 351 BY251S...BY255S Characteristics at Tanp = 25C Symboi Min. Typ. Max. Unit Forward Voltage Ve - = 1.1 V at Ir =3A Leakage Current Ir - - 20 BA Thermal Resistance Rina - - 30") K/W Junction to Ambient Air Valid provided that leads are kept at ambient temperature at a distance of 10 mm from case. Forward characteristic A BY 2518...2558 Jrav Tam) Tray(50C) Admissible rectified current versus ambient temperature Valid provided that leads are kept at ambient temperature at a distance of 10 mm from case. BY 2518...255S 100 Tame 200 C M@ 4642711 0003865 218