This part is a kind of semiconductor called BFS17.

Function of this product has RF TRANSISTOR.

Manufacturers : Motorola

Image and pinout :

Some of the text within the PDF file :

BFS17,S CASE 318-02/03, STYLE 6 SOT-23 (TO-236AA/AB) RF TRANSISTOR NPN SILICON MAXIMUM RATINGS Rating Collector-Emitter Voltage Collector-Base Voltage Symbol vCEO vCBO THERMAL CHARACTERISTICS Characteristic •Total Device Dissipation, T/ = 25°C Derate above 25°C Symbol PD Storage Temperature Tstg Thermal Resistance Junction to Ambient R 0JA mm•Package mounted on 99.5% alumina 10 x 8 x 0.6 ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted.) OFF CHARACTERISTICS Characteristic Collector-Emitter Breakdown Voltage OC = 10 mA) Collector-Base Breakdown Voltage OC = 100 ^A) Collector Cutoff Current (VC E = 10 V) Collector Cutoff Current (VC B = 15 V) Emitter Cutoff Current (VEB = 1.0 V) ON CHARACTERISTICS DC Current Gain dC = 2.0 mA, VCE = 1.0 V) dC = 2.0 mA, VC [ ... ]

BFS17 PDF Datasheet Download