THOMAS RESEARCH PRODUCTS Transformer 120:277-275VA Step-Up autotransformers designed especially for lighting applications. Features & Benefits Input Voltage: 120V, 60HzOutput Voltage: 277V, 60HzInsulation Rating: 130ºC Class BNon-isolated Autotransformer5 Year Warranty - Industry Leading Where To Buy SPEC SHEET Specifications Brand THOMAS RESEARCH PRODUCTS Specifications Brand THOMAS RESEARCH PRODUCTS Product Documents Spec Sheets 120-277-Transformers Specification Sheet 252 KB 2022-10-12 Warranties NX Lighting Controls 138 KB 2023-07-06