This part is a kind of semiconductor called 40N03GP.

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. AP40N03GP-HF-3 N-channel Enhancement-mode Power MOSFET Simple Drive Requirement Low Gate Charge D Fast Switching Performance RoHS-compliant, halogen-free G S BV DSS RDS(ON) ID 30V 17mΩ 40A Description Advanced Power MOSFETs from APEC provide the designer with the best combination of fast switching, low on-resistance and cost-effectiveness. The AP40N03GP-HF-3 is in the TO-220 through-hole package which is used in commercial appplications where a low PCB footprint or an attached heatsink is required. This device is well suited for low voltage applications such as DC/DC converters and high current DC switches. G DS D (tab) TO-220 (P) Absolute Maximum Ratings Symbol VDS VGS ID at TC=25°C ID at TC=100°C IDM PD at TC=25°C PD at TA=25°C TSTG [ ... ]

40N03GP PDF Datasheet Download