BY251

BY251 THRU BY255 Features · Low cost · Diffused junction · High current capability · The plastic material carries U/L recognition 94V-0 CURRENT 3.0 Amperes VOLTAGE 200 to 1300 Volts DO-201AD 0.210(5.3) 0.188(4.8) DIA. 1.0(25.4) MIN. Mechanical Data · Case : JEDEC DO-201AD molded plastic body · Terminals : Plated axial lead solderable per MIL-STD-750, method 2026 · Polarity : Color band denotes cathode end · Mounting Position : Any · Weight : 0.042 ounce, 1.1 grams 0.375(9.5) 0.285(7.2) 0.042(1.1) 0.037(0.9) DIA. 1.0(25.4) MIN. Dimensions in inches and (millimeters) Maximum Ratings And Electrical Characteristics (Ratings at 25℃ ambient temperature unless otherwise specified, Single phase, half wave 60Hz, resistive or inductive load. For capacitive load, derate by 20%) Symbols Maximum recurrent peak reverse voltage Maximum average forward rectified current at TA=50℃ Recurrent peak Forward Current Peak forward surge current 8.3ms half sine wave superimposed on rated load Maximum instantaneous forward voltage at 3.0A Maximum reverse current at rated DC blocking voltage Typical thermal resistance Typical junction capacitance (Note 1) Operating and storage temperature range VRRM I(AV) IFRM IFSM VF IR RθJA CJ TJ TSTG BY251 200 BY252 400 BY253 600 3.0 20.0 100.0 1.1 10.0 30.0 30.0 -50 to +150 BY254 800 BY255 1000 Units Volts Amps Amps Amps Volts μA ℃/W pF ℃ Notes: (1) Measured at 1MHz and applied reverse voltage of 4.0V DC. RATINGS AND CHARACTERISTIC CURVES BY251 THRU BY255 FIG.1-FORWARD CURRENT DERATING CURVE 4 10mm 10mm FIG.2-TYPICAL FORWARD CHARACTERISTICS 100 10 AVERAGE FORWARD CURRENT AMPERES INSTANTANEOUS FORWARD CURRENT(AMPERES) 3 TJ=150℃ Ror L-Load 1 2 C-Load TJ=25℃ 0.1 1 Typ.values 0.01 0.001 0 0 25 50 75 100 125 150 175 LEAD TEMPERATURE ( ℃) 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 INSTANTANEOUS FORWARD VOLTAGE (VOLTS) FIG.3-MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT 1000 FIG.4-TYPICAL THERMAL RESISTANCE 50 400 1 Cycle R0JA THERMAL RESISTANCE JUNCTION AMBIENT(℃/W) IFM 40 Max Permissible surge current(A) 200 TJ=25℃ 30 100 20 Typ 40 10 L L 20 1 2 4 10 20 100 0 0 5 10 15 NUMBER OF CYCLES AT 50Hz 20 25 30 L, LEAD LENGTH (mm)