BY251 - BY254 3.0 AMPS. Silicon Rectifiers DO-201AD RoRoHHSS Pb COCOMMPPLLIIANANCCEE Features High efficiency, Low VF High current capability High reliability High surge current capability Low power loss Green compound with suffix on packing code & prefix on datecode Mechanical Data Cases: Molded plastic Epoxy: UL 94V-0 rate flame retardant Dimensions in inches and (millimeters) Marking Diagram Lead: Pure tin plated, lead free, solderable per MIL-STD-202, Method 208 guaranteed BY25X = Specific Device Code Polarity: Color band denotes cathode G = Green Compound Y = Year High temperature soldering guaranteed: 260/10s /.375 , (9.5mm) lead lengths at 5 lbs, (2.3kg) tension WW = Work Week Weight: 1.2 grams Maximum Ratings and Electrical Characteristics Rating at 25 ambient temperature unless otherwise specified. Single phase, half wave, 60 Hz, resistive or inductive load. For capacitive load, derate current by 20% Symbol BY251 BY252 BY253 BY254 Units Type Number V Maximum Recurrent Peak Reverse Voltage 200 400 600 800 V RRM Maximum RMS Voltage V 140 280 420 560 V RMS Maximum DC Blocking Voltage V 200 400 600 800 V DC Maximum Average Forward Rectified Current I 3A F(AV) .375 (9.5mm) Lead Length T =75 A Peak Forward Surge Current, 8.3 ms Single Half Sine-wave I 150 A FSM Superimposed on Rated Load (JEDEC method) Maximum Instantaneous Forward Voltage (Note 1) V 1.0 V F 3 A 5 uA Maximum DC Reverse Current at T =25 A I R Rated DC Blocking Voltage T =125 A 100 uA Maximum Full Load Reverse Current, Full Cycle Average .375 (9.5mm) Lead Length I 30 uA R(AV) T =75 L Typical Junction Capacitance (Note 2) 40 Cj pF O R Typical Thermal Resistance (Note 3) 40 JA C/W O Operating Temperature Range T - 65 to + 150 J C O T Storage Temperature Range - 65 to + 150 STG C Note1: Pulse Test with PW=300 usec, 1% Duty Cycle Note2: Measured at 1 MHz and Applied Reverse Voltage of 4.0V D.C. Note3: Mount on Cu-Pad Size 16mm 16mm on P.C.B. Version:C10RATINGS AND CHARACTERISTIC CURVES (BY251 THRU BY254) FIG.1- MAXMUM FORWARD CURRENT FIG. 2- TYPICAL REVERSE DERATING CURVE CHARACTERISTICS 4 10 3 TA=125 1 2 RESISTIVE OR INDUCTIVE LOAD 0.1 1 TA=25 0 0.01 0 25 50 75 100 125 150 175 o 0 20 40 60 80 100 120 140 AMBIENT TEMPERATURE( C) PERCENT OF RATED PEAK REVERSE VOLTAGE (%) FIG. 3- MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT PER LEG 180 8.3ms Single Half Sine Wave 150 (JEDEC Method) 120 90 60 30 0 1 10 100 NUMBER OF CYCLES AT 60 Hz FIG. 5- TYPICAL FORWARD CHARACTERISTICS FIG. 4- TYPICAL JUNCTION CAPACITANCE 100 100 10 TA=25 TA=25 Pulse Width=300us 1 10 1% Duty Cycle 0.1 1 0.01 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 1 10 100 FORWARD VOLTAGE (V) REVERSE VOLTAGE (V) Version:C10 JUNCTION CAPACITANCE (pF) AVERAGE FORWARD PEAK FORWARD SURGE CURRENT(A) CURRENT(A) INSTANTANEOUS FORWARD INSTANTANEOUS REVERSE CURRENT (uA) CURRENT (A)