ERP Power XFC series of slimline stepdown transformers is designed for use in commercial, industrial, and outdoor lighting applications, where the mains power is 480 VAC (industrial, outdoor) or 347 VAC (Canada) and the required output is 277 VAC. This series is optimized for use with universal input (120 VAC to 277 VAC) LED drivers. All products are UL recognized components for US and Canada unless otherwise specified. Efficiency is typically greater than 90%.