It is not. The specification I look for is at what gate voltage is the minimum Ron specified at:
Drain to Source On Resistance (Note 2) rDS(ON) I D = 5.6A, VGS = 10V (Figure 8, 9) - 0.25 0.27 Ω
Yours uses 10 volt gate/source voltage for minimum Ron value which an arduino output pin cannot provide.
A true 'logic level" N-channel power mosfet will have at rating like this:http://www.sparkfun.com/datasheets/Components/General/RFP30N06LE.pdf
Drain to Source On Resistance (Note 2) rDS(ON) I D = 30A, VGS = 5V, Figure 9 - - 0.047 Ω
Showing minimum Ron value can be reached with 5 vdc of gate/source voltage applied.