Thank you all for the infos.I googled a little and this is what i found:

STP80NE06-10

http://www.datasheetcatalog.org/datasheet/stmicroelectronics/5632.pdf

VDS Drain-source Voltage (VGS=0)60V

VDGR Drain-gate Voltage (RGS=20k?)60V

VGS Gate-source Voltage ±20V

ID Drain Current (continuous) at Tc=25C 80A

ID Drain Current (continuous) at Tc=100C 57A

Im not familiar with MOSFETs.One thing that concerns me regarding this MOSFET is VGS value of 20V.Does it means that i must have 20V on gate for switching?

Sorry for all these questions.Thank you all.