This part is a kind of semiconductor called BF256A.

Function of this product has JFET - General Purpose.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

BF256A BF256A is a Preferred Device JFET - General Purpose N–Channel N–Channel Junction Field Effect Transistor designed for VHF and UHF applications. • • • • http://onsemi.com Low Cost TO–92 Type Package Forward Transfer Admittance, Yfs = 4.5 mmhos (Min) Transfer Capacitance – Crss = 0.7 (Typ) Power Gain at f = 800 MHz, Typ. = 11 dB 1 DRAIN 3 GATE MAXIMUM RATINGS Rating Drain–Source Voltage Drain–Gate Voltage Gate–Source Voltage Forward Gate Current Total Device Dissipation @ TA = 25°C Derate above 25°C Operating and Storage Channel Temperature Range Symbol VDS VDG VGS IG(f) PD 360 2.88 Tchannel, Tstg –65 to +150 mW mW/°C °C BF 256A YWW Value 30 30 30 10 Unit Vdc Vdc Vdc mAdc 1 2 3 TO–92 CASE 29 STYLE 5 2 SOURCE MARKING DIAGRAMS [ ... ]

BF256A PDF Datasheet Download