Triad chassis mount World Series Toroidal single phase transformers are efficient, compact, cool running and cost effective. They are approved to UL 506 and CE IEC 61558-1 and 615 58-2-6, and are constructed with a Class B ( 130C ) rated insulation system. These toroidal single phase transformers have minimal stray fields for quiet operation around sensitive circuits. The transformers consist dual primaries and dual secondaries which allows for flexibility in the input and output voltages. The primary and secondary are both electrically isolated from each other and from the core itself. Chassis mount Toroidal World Series single phase transformers are available in sizes ranging from 25 VA t o 2, 500 VA and a re equipped with leads for connections.