Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
For power components, I like Mohan's Power Electronics book. For diodes/bjts/mosfets, I have a set of books that my university published. They are very good books, but I do not believe they are in print anymore.