This part is a kind of semiconductor called AP20N15GI-HF-3.

Function of this product has N-CHANNEL ENHANCEMENT MODE POWER MOSFET.

Manufacturers : Advanced Power Electronics

Image and pinout :

Some of the text within the PDF file :

Advanced Power Electronics Corp. AP20N15GI-HF-3 N-channel Enhancement-mode Power MOSFET Simple Drive Requirement 100% Avalanche Tested Fast Switching Performance RoHS-compliant, halogen-free G S D BV DSS R DS(ON) ID 150V 100mΩ 20A Description Advanced Power MOSFETs from APEC provide the designer with the best combination of fast switching, low on-resistance and cost-effectiveness. The AP20N15GI-HF-3 is in the TO-220CFM isolated through-hole package which is widely used in commercial and industrial applications where a small PCB footprint and/or isolation from an attached heatsink is required. This device is well suited for use in medium voltage applications such as DC-DC converters and motor drives. Isolated tab G D S TO-220CFM (I) Absolute Maximum Ratings Symbol VDS VGS ID at [ ... ]

AP20N15GI-HF-3 PDF Datasheet Download