Let me preface this by saying I am not an electrical engineer of any sort. I'm working on a small-scale automation project (Arduino) with a local college. I'm supposed to be doing software, but the responsibility of electronics has kind of fallen to me as well, because my peers consist mostly of intimidated biologists. I can't find this exact MOSFET part on Google, but we need another one. What I want to know is either 1) where can I find this part or 2) where can I find a part that can do the same thing? I know the voltage/resistance can vary even amongst IRF520s, so that's why I'm asking. (http://imgur.com/hcslXg8) Sorry for ugly fingers, I had to bend the connector back a bit (yikes). I'm pretty sure the text says: IRF520 I[symbol]R P540D B9PO Thanks for helping a novice like me, means a lot.