This part is a kind of semiconductor called BFS17.

Function of this product has NPN 1 GHz wideband transistor.

Manufacturers : NXP

Image and pinout :

Some of the text within the PDF file :

DISCRETE SEMICONDUCTORS DATA SHEET BFS17 NPN 1 GHz wideband transistor Product specification File under Discrete Semiconductors, SC14 September 1995 Philips Semiconductors Product specification NPN 1 GHz wideband transistor DESCRIPTION NPN transistor in a plastic SOT23 package. APPLICATIONS • A wide range of RF applications such as: – Mixers and oscillators in TV tuners – RF communications equipment. PINNING PIN 1 2 3 base emitter collector DESCRIPTION Marking code: E1p. 1 Top view 2 MSB003 BFS17 handbook, halfpage 3 Fig.1 SOT23. QUICK REFERENCED DATA SYMBOL VCBO VCEO IC Ptot fT F PARAMETER collector-base voltage collector-emitter voltage DC collector current total power dissipation transition frequency noise figure up to Ts = 70 °C; note 1 IC = 25 mA; VCE = 5 V; f = 50 [ ... ]

BFS17 PDF Datasheet Download