If realized by SCR modules on extruded heat sinks with canalized air you can reach 750A. With diodes modules up to 1100A. Using disc components on heat sinks and built in an iron structure anchored on fiberglass plate, we realize convertor with extractable phase. This allow a fast remove of the singular phase for an easy field service. Performance becomes: SCR up to 4400A bridge, and with diodes up to 5000A.