This part is a kind of semiconductor called 75N75.

Function of this product has N-Channel Enhancement Mode MOSFET.

Manufacturers : Tuofeng Semiconductor

Image and pinout :

Some of the text within the PDF file :

Shenzhen Tuofeng Semiconductor Technology Co., Ltd 75N75 Features • 70V/80A, RDS(ON)=5.6 mΩ (typ.) @ VGS=10V • Avalanche Rated • Reliable and Rugged • Lead Free and Green Devices Available (RoHS Compliant) N-Channel Enhancement Mode MOSFET Pin Description G D S D Applications • Power Management for Inverter Systems. G S N-Channel MOSFET ÿ Note: TUOFENG lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which are fully compliant with RoHS. TUOFNEG lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for MSL classification at lead-free peak reflow temperature. TUFOENG defines “Green” to mean lead-free (RoHS compliant) and halogen free (Br or Cl does not exceed 900ppm by weight [ ... ]

75N75 PDF Datasheet Download