This part is a kind of semiconductor called 70N03.

Function of this product has Power-Transistor.

Manufacturers : Tuofeng Semiconductor

Image and pinout :

Some of the text within the PDF file :

Shenzhen Tuofeng Semiconductor Technology Co., Ltd Power-Transistor Features • N-channel - Enhancement mode • Automotive AEC Q101 qualified • MSL1 up to 260°C peak reflow • 175°C operating temperature • Green product (RoHS compliant) • Ultra low Rds(on) • 100% Avalanche tested Product Summary V DS R DS(on),max ID 70N03 30 V 8.0 mΩ 70 A TO-251 3 2 1 Type 70N03 Package TO-251 Maximum ratings, at T j=25 °C, unless otherwise specified Parameter Symbol Conditions Continuous drain current1) I D T C=25 °C, V GS=10 V Pulsed drain current2) I D,pulse T C=25 °C Avalanche energy, single pulse E AS I D=70 A Avalanche current, single pulse I AS T C=25 °C Gate source voltage V GS Power dissipation P tot T C=25 °C Operating and storage temperature T j, T stg [ ... ]

70N03 PDF Datasheet Download