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by Thomas Research Products 

Collection Name: Traditional Style Step-down Transformers

480 or 347V input, 277V output, 125 VA rating, Transformer loss: 7. Step-down autotransformers designed especially for lighting applications, typically used with 277V LED Drivers, T-5 or T-8 Electronic Fluorescent Ballasts or Electronic HID Ballasts in Industrial and Commercial applications.

  • Input Voltage: 480V, 60 Hz or 347V, 60 Hz
  • Output Voltage: 277V, 60 Hz
  • Non-isolated Autotransformer
  • 5 Year Warranty

Available to purchase from

Product Details


Style Core & Coil
Type 480/347V In: 277V Out, Step-Down

Electrical Ratings

Power Rating 101-250 V A