This part is a kind of semiconductor called BF240.

Function of this product has NPN RF Transistor.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

BF240 BF240 NPN RF Transistor 1 TO-92 1. Collector 2. Emitter 3. Base Absolute Maximum Ratings* Ta=25°C unless otherwise noted Symbol VCEO VCBO VEBO IC TJ, TSTG Parameter Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Collector Current - Continuous Operating and Storage Junction Temperature Range Value 40 40 4.0 50 - 55 ~ 150 Units V V V mA °C * These ratings are limiting values above which the serviceability of any semiconductor device may be impaired. NOTES: 1) These ratings are based on a maximum junction temperature of 150 degrees C. 2) These are steady state limits. The factory should be consulted on applications involving pulsed or low duty cycle operations Electrical Characteristics Ta=25°C unless otherwise noted Symbol Off Charac [ ... ]

BF240 PDF Datasheet Download