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| Surface Mount Schottky Barrier Diode P b Lead(Pb)-Free Features: *Low Turn-on Voltage *Fast Switching *PN Junction Guard Ring for Transient and ESD Protection Mechanical Data: *Case : SOT-346, Molded Plastic *Terminals : Solderable per MIL-STD-202,Method 208 *Polarity : See Diagrams Below *Weight : 0.008 grams (approx.) *Mounting Position : Any WEITRON WSD490/WSD491 SCHOTTKY BARRIER RECTIFIERS 1.0AMPERES 20-40VOLTS 3 2 1 SC-59 SC-59 Outline Dimension A L S 3 Top View Dim SC-59 Min 2.70 1.30 1.00 0.35 1.70 0.00 0.10 0.20 1.25 2.25 Max 3.10 1.70 1.30 0.50 2.30 0.10 0.26 0.60 1.65 3.00 A B C D G H J K L S 2 1 B D G C H K J All Dimension in mm http://www.weitron.com.tw WEITRON WSD490/WSD491 Maximum Ratings and Electrical Characteristics Rating 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 Maximum Recurrent Peak Reverse Voltage Maximum RMS Voltage Maximum DC Blocking Voltage Maximum Average Forward Rectified Current Peak Forward Surge Current, 8.3 ms Single Half Sine-Wave Superimposed on Rated Load (JEDEC Method) Maximum Instantaneous Forward Voltage at 1.0A Maximum DC Reverse Current Ta=25 C At Rated DC Blocking Voltage Ta=100 C Operating Temperature Range Tj Storage Temperature Range TSTG WSD491 25 14 20 1.0 3.0 0.45 WSD490 40 28 40 Unit V V V A A 0.53 0.2 4.0 V mA mA C C -25....+ 125 -50....+ 125 Device Marking Item WSD491 WSD490 Marking 10T 10F Eqivalent Circuit diagram 3 CATHODE 2 ANODE 3 CATHODE 2 ANODE WEITRON http://www.weitron.com.tw WSD490/WSD491 50 INSTANTANEOUS FORWARE CURRENT(A) AVERAGE FORWARD 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 Single Phase Half Wave 60Hz Resistive Or Inductive Load WS D4 10 3.0 1.0 91 W T=25 C Pulse Width 300us 1% Duty Cycle SD 49 0 0.1 FIG.2 Typical Forward Current Derating Curve AMBIENT TEMPERATURE ( C) .01 .1 .3 .5 .7 .9 1.1 1.3 1.5 JUNCTION CAPACITANCE (pF) FORWARE VOLTAGE.(V) 175 150 125 100 75 50 25 0 .01 .05 .1 .5 1 5 10 50 100 FIG.1 Typcial Forward Characteristics 100 REVERSE LEAKAGE CURRENT (mA) 10 1.0 Tj=75 C REVERSE VOLTAGE (V) FIG .4 Typical Junction Capacitance Tj=25 C .1 .01 0 20 40 60 80 100 120 140 PERCENTAGE RATED PEAK REVERSE VOLTAGE FIG.3 Typical Reverse Characteristics http://www.weitron.com.tw WEITRON |
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