Keystone’s step down transformers provide a safe and reliable power conversion solution.

Menu

Keystone’s step down transformers are ideal for powering down from a 480V or 347V system to a 277V system, rated up to 375W. Utilizing a precision wound core and coil integrated design, these auto transformers provide a safe and reliable solution for effective power conversion to use standard 277V or multi-voltage lighting ballasts. Keystone’s step down auto transformers are non-isolated, making them compact and lightweight compared to isolated transformers.

Product Features and Benefits

  • Non-isolated auto transformer
  • 5 year limited warranty
  • For use with electronic LED drivers and ballasts operating at 277V input voltage
  • Thermally protected
  • UL and cUL 5085 approved
5 Year Warranty

Tech Specs


The Keystone Difference

Free samples

Friendly customer service

Fast quotes

Quick delivery

Industry-leading warranty

U.S. based

Request a free sample

Place an order

Sign up for special offers