This part is a kind of semiconductor called IRF540.

Function of this product has N-Channel Power MOSFETs.

Manufacturers : Harris

Image and pinout :

Some of the text within the PDF file :

Semiconductor IRF540, IRF541, IRF542, IRF543, RF1S540, RF1S540SM 25A and 28A, 80V and 100V, 0.077 and 0.100 Ohm, N-Channel Power MOSFETs Description These are N-Channel enhancement mode silicon gate power field eff ect tr ansistors. The y are adv anced po wer MOSFETs designed, tested, and guaranteed to withstand a specified level of energy in the breakdo wn avalanche mode of operation. All of these po wer MOSFETs are designed f or applications such as s witching regulators, switching convertors, motor dr ivers, relay drivers, and dr ivers for high po wer bipolar s witching tr ansistors requir ing high speed and lo w gate drive power. These types can be operated directly from integrated circuits. Formerly developmental type TA17421. November 1997 Features • 25A and 28A, 80V and 100V [ ... ]

IRF540 PDF Datasheet Download