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| PSD490 thru PSD491 SURFACE MOUNT SCHOTTKY BARRIER DIODES SCHOTTKY BARRIER RECTIFIERS 1.0A MPERES 20~40 VOLTS SC-59 1.06(2.70) 1.22(3.10) .049(1.25) .065(1.65) 3 .089(2.25) 1.18(3.00) TOP VIEW 2 1 .051(1.30) 0.67(1.70) .014(0.35) .020(0.50) .067(1.7) .090(2.30) .039(1.00) 0.00 .004(0.10) .051(1.30) .008(0.20) .024(0.60) .004(0.10) .010(0.26) FEATURES Low Turn-on Voltage Fast Switching PN Junction Guard Ring for Transient and ESD Protection MECHANICAL DATA Case SOT-346/SC-59 Molded Plastic Terminals Solderable per MIL-STD-202, Method 208 Polarity See Diagrams Below Weight 0.008gram (approx) Mounting Position Any MAXIMUM RATIXGS AND ELECTRICAL CHARACTERISTICS Ratings at 25oC ambient temperature unless otherwise specified Single phase, half wave, 60Hz, resistive or inductive load For capacitive load, derate current by 20% TYPE NUMBER Maximum Recurrent Peak Reverse Voltage Maximum RMS Voltage Maximum DC Blocking Voltage Maximum Average Forward Rectified Current Peak Forward Surge Current 8.3mm Single Half Sine-Wave Superimposed on Rated Load (JEDEC Method) Maximum Instantaneous Forward Voltage at 1.0A Maximum DC Reverse Current TA=250C at Rated DC Blocking Voltage TA=1000C Operating Temperature Range TJ Storage Temperature Range TSTG 0.45 0.2 4.0 PSD491 20 14 20 1.0 3.0 0.53 PSD490 40 28 40 UNITS Volts Volts Volts A A V mA 0 -25 to +125 -50 to +125 C C 0 www.paceleader.tw 1 PSD490 thru PSD491 SURFACE MOUNT SCHOTTKY BARRIER DIODES RATING AND CHARACTERISTICS CURVES PSD490 THRU PSD491 A VERAGE FORW ARD CURRENT(A) 50 INSTANTANEOUS FORW ARE CURRENT(A) 1.2 1.0 0.8 0.6 0.4 0.2 0 0 20 40 60 80 100 120 140 160 180 200 AMBIENT TEMPERA TURE ( C) Single Phase Half Wave 60Hz Resistive Or Inductive Load PS D4 10 91 3.0 1.0 T=25 C Pulse Width 300us 1% Duty Cycle PS D4 90 0.1 FIG.2 Typical Forward Current Derating Curve .01 .1 .3 .5 .7 .9 1.1 1.3 1.5 175 JUNCTION CAPACITANCE (pF) 150 125 100 75 50 25 FORW ARE VOL TAGE.(V) FIG.1 Typcial Forward Characteristics 100 REVERSE LEAKAGE CURRENT (mA) 10 0 .01 .05 .1 .5 1 5 10 50 100 REVERSE VOL TAGE (V) FIG .4 Typical Junction Capacitance 1.0 Tj=75 C Tj=25 C .1 .01 0 20 40 60 80 100 120 140 PERCENTAGE RA TED PEAK REVERSE VOL TAGE FIG.3 Typical Reverse Characteristics www.paceleader.tw 2 |
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