Low turn-on voltage, TV tuners, Schottky transistor, high frequency,

 BAT54SW Series 30 V 600 mA Surface Mount Schottky Barrier Diode - SOT-323

https://www.futureelectronics.com/p/semiconductors--discretes--diodes--schottky-diodes/bat54sw-7-f-diodes-incorporated-9169850