Hi I ahve a situation where I use Vishay IRFP240 nad with VDS=24V and VGS 3.8V i GET 1,4 AMPERES. The datashheet shows tha I need 4.8v for 1.4 amperes. In a same circuit that I use IR mosfets I need 4.87 VGS for 1. 3 ampere. Is this is normal? Are the mosfets fake Is anything else wrong?