WSD491

WEITRON Surface Mount Schottky Barrier Diode P b Lead(Pb)-Free Features: * Low current rectification and high speed switching. * Small surface mount type. * Up to 500mA current capability. * Low forward voltage drop . * Silicon epitaxial planar chip, metal silicon junction. * Lead-free parts meet environmental standards of MIL-STD-19500 /228 Mechanical Data: * Epoxy:UL94-V0 rated flame retardant * Case : Molded plastic, SOT-23 * Terminals : Solder plated, solderable per MIL-STD-750, Method 2026 * Mounting Position : Any * Weight : Approximated 0.008 gram WSD490/WSD491 SCHOTTKY BARRIER RECTIFIERS 1.0AMPERES 25-45VOLTS 3 1 2 SOT-23 SOT-23 Outline Dimensions A Unit:mm TOP VIEW B C E G H D K L J M Dim A B C D E G H J K L M Min 0.37 1.20 2.10 0.89 0.46 1.78 2.80 0.01 0.89 0.35 0.09 Max 0.50 1.40 2.64 1.09 1.00 2.04 3.04 0.13 1.11 0.69 0.18 WEITRON http://www.weitron.com.tw 1/3 Rev.A 11-Jan-2011 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 Continuous reverse voltage Mean rectifying current 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 Storage Temperature Range Symbol VRM VR Io IFSM VF IR Tj TSTG WSD490 45 45 1.0 3.0 0.50 0.2 4.0 WSD491 25 25 Unit V V A A 0.45 V mA mA C C -50 to + 125 -50 to + 125 Device Marking Item WSD491 WSD490 Marking 10T 10F Eqivalent Circuit diagram 3 CATHODE 1 ANODE 3 CATHODE 1 ANODE WEITRON http://www.weitron.com.tw 2/3 Rev.A 11-Jan-2011 WSD490/WSD491 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 AMBIENT TEMPERATURE ( C) Single Phase Half Wave 60Hz Resistive Or Inductive Load 50 INSTANTANEOUS FORWARE CURRENT(A) 10 3.0 W 49 1D W 49 0D 1.0 TJ=25 C Pulse Width 300us 1% Duty Cycle 0.1 FIG.2 Typical Forward Current Derating Curve .01 .1 .2 .3 .4 .5 .6 .7 .8 FORWARE VOLTAGE.(V) JUNCTION CAPACITANCE (pF) 175 150 125 100 75 50 25 0 FIG.1 Typcial Forward Characteristics 100 REVERSE LEAKAGE CURRENT (mA) 10 .01 .05 .1 .5 1 5 10 50 100 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 WEITRON http://www.weitron.com.tw 3/3 Rev.A 11-Jan-2011