This part is a kind of semiconductor called H9N03LA.
Function of this product has IPDH9N03LA.
Manufacturers : Infineon Technologies
Image and pinout :

Some of the text within the PDF file :
IPDH9N03LA G IPSH9N03LA G OptiMOS®2 Power-Transistor Features • Ideal for high-frequency dc/dc converters • Qualified according to JEDEC1) for target application • N-channel, logic level • Excellent gate charge x R DS(on) product (FOM) • Superior thermal resistance • 175 °C operating temperature • Pb-free lead plating; RoHS compliant Product Summary V DS R DS(on),max (SMD version) ID 25 9.2 30 V mΩ A Type IPDH9N03LA G IPSH9N03LA G Package Marking PG-TO252-3-11 H9N03LA PG-TO251-3-11 H9N03LA Maximum ratings, at T j=25 °C, unless otherwise specified Parameter Continuous drain current Symbol Conditions ID T C=25 °C2) T C=100 °C Pulsed drain current Avalanche energy, single pulse Reverse diode d v /dt Gate source voltage4) Power dissipation Operating and storage t [ ... ]
H9N03LA PDF Datasheet Download
