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The Gas Circuit Breaker Department includes general purpose, definite purpose, and synchronous switching circuit breakers. SF6 circuit breakers are manufactured at two locations:


  • Warrendale, Pennsylvania in the United States
  • Itami in Japan


Warrendale Facility
Mitsubishi Electric Power Products, Inc. (MEPPI) is located in Warrendale, Pennsylvania, a suburb of Pittsburgh. This location serves as the center for gas circuit breaker manufacturing, product service, and training. Over 3000 Dead Tank SF6 Gas Circuit Breakers from 72.5kV through 550kV have been manufactured and tested at this facility since 1990.

Itami Works
Mitsubishi Electric Corporation manufactures SF6 Gas Circuit Breakers at the Itami Works facility in Osaka, Japan. More than 20,000 SF6 Gas Circuit Breakers produced at this location have been put into service since 1965. Itami Works facility manufactures Dead Tank and Live Tank SF6 Gas Circuit Breakers from 72.5kV through 550kV.