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by Thomas Research Products 

Collection Name: Traditional Style Step-up Transformers

120V input, 268/277V output, 500 VA rating, transformer loss: 25. Step-Up autotransformers designed especially for lighting applications, typically used with 277V LED Drivers, T-5 or T-8 Electronic Fluorescent Ballasts, Electronic HID and Plasma/Induction Ballasts in Industrial and Commercial applications.

  • Input Voltage: 120V, 60Hz
  • Output Voltage: 277V, 60Hz
  • Insulation Rating: 130ºC Class B
  • Non-isolated Autotransformer
  • 5 Year Warranty - Industry Leading

Available to purchase from

Product Details


Style Core & Coil
Type 120V In: 277V Out, Step-Up

Electrical Ratings

Power Rating 251-500 V A