Power Electronic Building Blocks (PEBB)

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http://forum.allaboutcircuits.com – Evening gents, I'm wondering if anyone has any information regarding PEBBs, that is, Power Electronic Building Blocks. (See figure attached) I've tried googling around to try and find a venue from which to buy these blocks from, but I haven't had much luck. I did find one link from ABB (http://www.abb.com/product/ap/seitp3...a00449e0e.aspx), but it doesn't give much information regarding the different types of blocks that they might carry, or how you can order them. More specifically, I'm looking for a block that I could use as a half H-bridge for a motor controller for an electric mot (Embedded)