hrfz44n.pdf datasheet:

HRFZ44NData Sheet June 1999 File Number 475249A, 55V, 0.022 Ohm, N-Channel UltraFET FeaturesPower MOSFET 49A, 55VThis N-Channel power MOSFET is Simulation Modelsmanufactured using the innovative- Temperature Compensated PSPICE and SABERUltraFET process. This advancedElectrical Modelsprocess technology achieves the- Spice and Saber Thermal Impedance Modelslowest possible on-resistance per silicon area, resulting in- www.semi.Intersil.com/families/models.htmoutstanding performance. This device is capable ofwithstanding high energy in the avalanche mode and the Peak Current vs Pulse Width Curvediode exhibits very low reverse recovery time and stored UIS Rating Curvecharge. It was designed for use in applications where power Related Literatureefficiency is important, such as switching regulators,- TB334, Guidelines for