This part is a kind of semiconductor called BF256B.

Function of this product has N-Channel RF Amplifiers.

Manufacturers : Fairchild Semiconductor

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Some of the text within the PDF file :

BF256B N-Channel RF Amplifiers November 2014 BF256B N-Channel RF Amplifiers Features • This device is designed for VHF / UHF amplifiers • Sourced from process 50 1 TO-92 1. Gate 2. Source 3. Drain Ordering Information Part Number BF256B Top Mark BF256B Package TO-92 3L Packing Method Bulk Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Values are at TA = 25°C unless otherwise noted. Symbol Parameter Value Uni [ ... ]

BF256B PDF Datasheet Download