BY251 - BY254 Pb 3.0 AMPS. Silicon Rectifiers DO-201AD RoHS COMPLIANCE Features High efficiency, Low VF High current capability High reliability High surge current capability Low power loss Green compound with suffix "G" on packing code & prefix "G" 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 High temperature soldering guaranteed: 260/10s /.375", (9.5mm) lead lengths at 5 lbs, (2.3kg) tension Y = Year 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% Type Number Symbol BY251 BY252 BY253 BY254 Units Maximum Recurrent Peak Reverse Voltage VRRM 200 400 600 800 V Maximum RMS Voltage VRMS 140 280 420 560 V Maximum DC Blocking Voltage VDC 200 400 600 800 V Maximum Average Forward Rectified Current .375"(9.5mm) Lead Length @TA=75 IF(AV) 3 A Peak Forward Surge Current, 8.3 ms Single Half Sine-wave Superimposed on Rated Load (JEDEC method) IFSM 150 A VF 1.0 V 5 uA 100 uA 30 uA Maximum Instantaneous Forward Voltage (Note 1) @3A Maximum DC Reverse Current at Rated DC Blocking Voltage @ TA=25 @ TA=125 Maximum Full Load Reverse Current, Full Cycle Average .375"(9.5mm) Lead Length @TL=75 Typical Junction Capacitance (Note 2) Typical Thermal Resistance (Note 3) Operating Temperature Range Storage Temperature Range IR IR(AV) Cj 40 RJA 40 TJ - 65 to + 150 O TSTG - 65 to + 150 O pF O C/W C 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 x 16mm on P.C.B. Version:C10 RATINGS AND CHARACTERISTIC CURVES (BY251 THRU BY254) FIG.1- MAXMUM FORWARD CURRENT DERATING CURVE 4 FIG. 2- TYPICAL REVERSE CHARACTERISTICS INSTANTANEOUS REVERSE CURRENT (uA) 10 AVERAGE FORWARD CURRENT(A) 3 2 RESISTIVE OR INDUCTIVE LOAD 1 0 0 25 50 75 100 125 150 175 TA=125 1 0.1 TA=25 0.01 0 AMBIENT TEMPERATURE(oC) 20 40 60 80 100 120 140 PERCENT OF RATED PEAK REVERSE VOLTAGE (%) FIG. 3- MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT PER LEG 180 8.3ms Single Half Sine Wave (JEDEC Method) PEAK FORWARD SURGE CURRENT(A) 150 120 90 60 30 0 1 10 NUMBER OF CYCLES AT 60 Hz 100 FIG. 4- TYPICAL JUNCTION CAPACITANCE 100 INSTANTANEOUS FORWARD CURRENT (A) 100 JUNCTION CAPACITANCE (pF) FIG. 5- TYPICAL FORWARD CHARACTERISTICS TA=25 10 10 TA=25 Pulse Width=300us 1% Duty Cycle 1 0.1 0.01 1 1 10 REVERSE VOLTAGE (V) 100 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 FORWARD VOLTAGE (V) Version:C10 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Taiwan Semiconductor: BY251 BY252 BY253 BY254