View bat54sw datasheet:

Preliminary Data Sheet PD-20640 12/01 BAT54SW 0.2 Amp SCHOTTKY RECTIFIER 3 2 Major Ratings and Characteristics SOT323 Characteristics Value Units Description/ Features I F (DC) Per Leg 0.2 A This Schottky barrier double diode is designed for high speed switching application, voltage clamping and circuit protection. VRRM 30 V Miniature surface mount packages with reduced foot print are excellent for portable application where space is limited IFSM @ tp= 10 ms sine 1.0 A Small foot print, surface mountable VF @ 30mA DC, TJ= 25°C 0.5 V Very low forward voltage drop Extremely fast switching speed for high frequency operation Pd Power Dissipation 200 mW @ TA = 25°C Guard ring for enhanced ruggedness and long term reliability TJ range - 65 to 150 °C Case Styles Device M