BY251 YANGJIE | Alldatasheet
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‘© Low forward voltage drop ‘* High current capability ‘* High reliability 4.0(25.4) ‘@ High surge current capability 220(5.6) MIN. 797(5.0) Mechanical Data we) Ly le '* Cases:Molded plastic ‘* Epoxy:UL 94V-0 rate flame retardant 375(9.5) * Lead:Axial leads, solderable per MIL-STD-202, 33565) Method 208 guaranteed ‘* Polarity:Color band denotes cathode end ‘* High temperature soldering guaranteed: 1.0(25.4) 250°CI10 seconds/.375" (9.5mm) lead MIN lengths at 5 Ibs.,(2.3kg) tension Cine ‘© Weight:1.2 grams DIA Dimensions in inches and (milimeters) MAXIMUM RATINGS AND ELECTRICAL CHARACTERISTICS Rating at 25°C ambient temperature unless otherwise specified. Single phase, half wave, 60Hz, resistive or inductive load. For capacitive load, derate current by 20% Type Number By251 By252 By253 sy254 | By255__ {UNITS ‘Maximum Average Forward Rectified Current 3.0 A 375"(9.5mm) Lead Length @TA = 75°C trav) Peak Forward Surge Current, 8.9 ms Single Half Sine-wave Superimposed on Rated Load A WEDEC method) ‘Maximum Instantaneous Forward Voltage Fa a Maximun DC Reverse Current @ Ta= 25°C uA at Rated DC Blocking Voltage @ Ta= 100°C uA ‘Maximun Full Load Reverse Current, Full A Cycle Average .375"(9.5mm) Lead Length uw @TL=75C “Typical Junction Capacitance (Note 1) a ‘Typical Thermal Resistance (Note 2) ‘Operating Temperature Range “55 to¥125 Storage Temperature Range -55 to¥150 NOTES: 1. Measured at 1 MHz and Applied Reverse Voltage of 4.0 Volts D.C. 2.Thermal Resistance from Junction to Ambient .375"(9.5mm) Lead Length.
RATING AND CHARACTERISTIC CURVES ad BY251 THRU BY255 TI, F162: MAXIMUN NON-REPETITIVE FORWARD Fi -WaRIUM FORWARD CURRENT OERATING UN NON REPETITI PEELE TTL) SCRE s, Fo oot 2 00 po 5 2 eee 4 ° IND SREPETITIYE | EST) € 8 a OO 3 oe ee 22 \\ i) g Single Phase 2 COCO oe & | esneor \\ E ETT ©, L_ Resistive or g pl 1 g Inductive Load & '8.3ms Single Half REPETITIVE HT] i ead Lenath 5 ° 0 25 50 7S 100 125 150 175 1 5 10 50 100 AMBIENT TEMPERA TURE. (°C) NUMBER OF CYCLESAT S012 FG 4-TYPIOAL JUNCTION CAPACITANCE top Lee Ley FIG.4-TYPICAL REVERSE CHARACTERISTICS 2.) SSS ee a a = —— 8 Coo Se Fa ee ee el 2 —— ae Se ees i ee ee ay Ak — ee
2 Lf ZF atn-sooxs |_| 5 ee
—— — Ey
64 ESF eo ee SS oL _[ TT HW TT TTT
————— REVERSE VOLTAGE.(V) 24 a A ae ee ee a — ——— SS ol _f TT [ tT TT a5 8 1012 18 18 18 FORWARD VOLTAGE (V) F1G5-TVPICAL REVERSE CHARACTERISTICS 109 eT] [ [TT 7 fT 7 g - See Se g SS Ss SS a ce 2 ere ———— g SS SS | a a 2 (=F + ——) a e ———— 2 ot a o 2546801002) 40 RERCENT OF RATED PEAK REVERSE VOLTAGE.(%)