This part is a kind of semiconductor called BA682.

Function of this product has Silicon Epitaxial Planar Diode Switches.

Manufacturers : Semtech Corporation

Image and pinout :

Some of the text within the PDF file :

BA682, BA683 SILICON EPITAXIAL PLANAR DIODE SWITCHES In MiniMELF case especially suited for automatic insertion for electronic band-switching in radio and TV tuners in the frequency range of 50 to 1000 MHz .The dynamic forward resistance is constant and very small over a wide range of frequency and forward current. The reverse capacitance is also small and largely independent of the reverse voltage. These diodes are delivered taped. Details see “Taping”. Absolute Maximum Ratings (T a = 25oC) Reverse Voltage Forward Current at Tamb = 25oC Junction Temperature Storage Temperature Range Symbol VR IF Tj TS Value 35 100 150 -55 to +150 Unit V mA OC OC Characteristics at T j = 25oC Forward Voltage at IF = 100mA Leakage Current at VR = 20V Dynamic Forward Resistance at f = 50 to 1000 MHz, [ ... ]

BA682 PDF Datasheet Download