GD BY251 THRU BY255 3.0 AMPS. SILICON RECTIFIERS VOLTAGE RANGE 50 to 1000 Volts CURRENT 3.0 Amperes FEATURES * Low forward voltage drop * High current capability * High reliability * High surge current capability MECHANICAL DATA x Case: Molded plastic * Epoxy: UL 94V-0 rate flame retardant * Lead: Axial leads, solderable per MIL-STD-202, method 208 guaranteed * Polarity: Color band denotes cathode end * Mounting Position: Any * Weight:1.18 grams : DO-201AD | f 2106.3) 1.0(25.4) 790(4.8) Nin DIA. L. - . | 1 [| Soars} | 1.0(25.4) MIN. 0621.3) 048(T.2) 7) [7 DIA. | Li Dimensions in inches and (millimeters) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Rating at 25C ambient temperature unless otherwise specified. Single phase, half wave, Hz, resistive or inductive load. For capacitive ioad, derate current by 20% TYPE NUMBER SYMBOLS] BY251 | BY252 | BY253 | BY254 | BY255 | UNITS Maximum Recurrent Peak Reverse Voltage VrrRmM 200 400 600 800 1300 Maximum RMS Voltage Vams 140 280 420 560 910 Maximum D.C Blocking Voltage Voc 200 400 600 00 1300 Maxirnum Average Forward Rectified Current Ircav) 30 " A .375" (9.5mm) lead length _ @ T, = 75C Peak Forward Surge Current, 8.3 ms single half sine-wave Irma 450 A superimposed on rated load( JEDEC method) Maximum Instantaneous Forward Voltage at 3.0A VE 1.0 Vv Maximum D.C Reverse Current @ Ta =25T In 5.0 pA at Rated D.C Blocking Voltage @ Ta = 100 100 pA Typical Junction Capacitance (Note 1) Cy 50 pF Typical Therma! Resistance (Note 2) Raa 18 C/W Operating Temperature Range Ty - 65 to+125 c Storage Temperature Range Tstc 65 to+ 150 c NOTES :1.Measured at 1 MHz and applied reverse voltage of 4.0V D.C. 2. Thermal Resistance from Junction to Ambient 0.375"(9.5mm) Lead Length. JINAN GUDE ELECTRONIC DEVICE Co., LTD.RATINGS AND CHARACTERISTIC CURVES (BY251 THRU BY255) FIG. 1 - TYPICAL FORWARD CURRENT: DERATING CURVE ZS 4 5 0.375%9.5mm) a >| UEAD LENGTH c x a 3 r | O 8% 0.8% 0.04" c (20x 20 ximm) < 2 \ COPPER HEAT-SINKS 5 Single Phase \ w Half Wave 60 Hz a wu IT Resistive or 5 9 Inductive Load 0.375(.5mm) Lead Length 2 % 3580 75C100~=~*SHSSC*dTSST AMBIENT TEMPERATURE (Q) FIG.3 - TYPICAL FORWARD CHARACTERISTICS 100 30 10 3.0 1.0 INSTANTANEOUS FORWARD CURRENT (A) Oy 6 81 1 1416 18 FORWARD VOLTAGE (y) INSTANTANEOUS REVERSE CURRENT (#A) FIG.2-MAXIMUM NON-REPETITIVE FORWARD SURGE CURRENT 8.3ms Single Half Sine Wave PEAK FORWARD SURGE CURRENT (A) NUMBER OF CYCLES AT 60 Hz FIG.4 TYPICAL REVERSE CHARACTERISTICS = 0. 7 PERCENT OF RATED PEAK REVERSE VOLTAGE .(%) FIG.5- TYPICAL JUNCTION CAPACITANCE JUNCTION CAPACITANCE (pF) _, JINAN GUDE ELECTRONIC DEVICE CO., LTD.