[Very Very Simple Thermal Fan Controller]

I think I may have found the right one

http://gb.mouser.com/ProductDetail/Stancor/3F11-100/?qs=sGAEpiMZZMud6ugn6h0MdptnTSKSFUB%2fdCMoJL0vPd4%3d

[Very Very Simple Thermal Fan Controller]

Good evening folks, very new to the electronics game. I've decided to create a Mac Mini acrylic rack mount with integrated fans controlled by a temperature sensor.

This is my plan, use a 5v from the USB to power the fan and have a thermal switch in the middle to start it up when it meets the thermal sensor temperature then cut out when it goes below that temperature. I understand using a thermostat would give me variable control but I'm after a really simple design.

I've found these
http://www.rapidonline.com/sku/Electronic-Components/Sensors/Thermal-Sensors/Auto-reset-thermal-switches/35569/26-7404

They're not the temp I want but would they work to simply wire them between fan and power? I'm after a 30c switch really

Thanks in advance