Problem switching a MOSFET with arduino
First, you can not use an N-Channel MOSFET like that to high-side switch power to a load. The gate voltage would been to be greater than Vdd when the thing is turned on.

N-Channels are better suited for low-side switching, as shown below.







simulate this circuit &ndash; Schematic created using CircuitLab

Second, even if properly configured as a low side switch, that particular device is only guaranteed to start turning on at 4V, which will be marginal with a 5V Arduino, and way too high for a 3.3V model.

If you really need to use high side switching you need to use a two stage switch like this one.







simulate this circuit

However, switching 200V at  higher speeds is not that easy.

In all cases you need to include an appropriate gate resistor to limit the current required from the Arduino to switch the MOSFET and to provide a little isolation from voltage spikes.