This part is a kind of semiconductor called BB204.

Function of this product has VHF variable capacitance double diodes.

Manufacturers : Philipss

Image and pinout :

Some of the text within the PDF file :

DISCRETE SEMICONDUCTORS DATA SHEET alfpage M3D152 BB204B; BB204G VHF variable capacitance double diodes Product specification Supersedes data of April 1992 File under Discrete Semiconductors, SC01 1996 May 03 Philips Semiconductors Product specification VHF variable capacitance double diodes FEATURES • Selected capacitance ranges • Leaded plastic package • C30: 14 pF; ratio: 2.6. APPLICATIONS • Electronic tuning in FM radio applications • VCO. DESCRIPTION The BB204B, BB204G are variable capacitance double diodes with common cathodes, fabricated in planar technology, and encapsulated in TO-92 variant leaded plastic packages. handbook, halfpage 1 BB204B; BB204G PINNING PIN 1 2 3 anode (a1) common cathode anode (a2) DESCRIPTION 2 3 1 2 3 MAM223 Fig.1 Simplified outline ( [ ... ]

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