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 1 2 .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) .004(0.10) .010(0.26) .008(0.20) .024(0.60) FEATURES MECHANICAL DATA Low Turn-on Voltage Fast Switching PN Junction Guard Ring for Transient and ESD Protection 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 PSD491 PSD490 UNITS 20 40 Volts Maximum RMS Voltage 14 28 Volts Maximum DC Blocking Voltage 20 40 Volts Maximum Average Forward Rectified Current 1.0 A Peak Forward Surge Current 8.3mm Single Half Sine-Wave Superimposed on Rated Load (JEDEC Method) 3.0 A Maximum Instantaneous Forward Voltage at 1.0A 0.45 Maximum DC Reverse Current TA=250C at Rated DC Blocking Voltage TA=1000C 0.53 0.2 4.0 V mA Operating Temperature Range TJ -25 to +125 0 Storage Temperature Range TSTG -50 to +125 0 www.paceleader.tw 1 C C PSD490 thru PSD491 SURFACE MOUNT SCHOTTKY BARRIER DIODES RATING AND CHARACTERISTICS CURVES PSD490 THRU PSD491 AVERAGE FORWARD CURRENT(A) 91 10 PS D4 90 PS D4 INSTANTANEOUS FORWARE CURRENT(A) 50 3.0 1.0 1.2 1.0 0.8 0.6 Single Phase Half Wave 60Hz Resistive Or Inductive Load 0.4 0.2 0 0 T=25 C Pulse Width 300us 1% Duty Cycle 20 .1 .3 .5 .7 .9 1.1 1.3 60 80 100 120 140 160 180 200 AMBIENT TEMPERATURE ( C) FIG.2 Typical Forward Current Derating Curve 0.1 .01 40 1.5 175 FIG.1 Typcial Forward Characteristics 100 JUNCTION CAPACITANCE (pF) FORWARE VOLTAGE.(V) 150 125 100 75 50 REVERSE LEAKAGE CURRENT (mA) 25 10 0 .01 .05 .1 .5 1 5 10 REVERSE VOLTAGE (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 RATED PEAK REVERSE VOLTAGE FIG.3 Typical Reverse Characteristics www.paceleader.tw 2 50 100