When looking for a new hard drive for the PS3 there are four key features you must be looking for:
1. 2.5" width- These are notebook hard drives and that size is what you are looking for. 3.5" desktop hard drives will not fit.
2. 9.5mm Height- This is normal but keep an eye out for drives that may be smaller or bigger because they will not fit.
3. 5400 RPM speed- Although the PS3 can handle the faster 7200RPM, you run the risk of overheating the system for a few milliseconds faster in loading time. The original drive that came with your console is 5400RPM so make sure the new one is as well. (This one is still up for debate)
4. Must be SATA
So you should be fine in that range.