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 V_AC (industrial, outdoor) or 347 V_AC (Canada) and the required output is 277 V_AC. This series is optimized for use with universal input (120 V_AC to 277 V_AC) LED drivers. All products are UL recognized components for US and Canada unless otherwise specified. Efficiency is typically greater than 90%.