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Panel Extension PX3 - External Mounting

Panel Extension PX3 - External Mounting

Panel Extension® PX3™ protects and prevents costly downtime and equipment failure. PX3 features an externally mounted surge solution that can be physically attached to the top or bottom of any panelboard providing a reduced profile surge solution. Moreover, PX3 offers an internal disconnect option, allowing safer and easier repairs without having to cut power to the distribution panel. 


  • Extends equipment life by reducing equipment degrading high-frequency line noise and transients
  • Designed for quick and easy installation
  • Easy accessibility to real-time data via display located on the unit or remotely
  • PX3 color can be matched to any switchgear and panelboard offered by a different manufacturer
  • Standard 15-year warranty


  • Space-saving design that fits within a standard 6-inch deep wall and conserves horizontal wall space
  • Direct bus connection capability to reduce wiring lead lengths, minimizing installation impedances and improve clamping voltages
  • Removable end-plate allows installation above or below panelboards
  • Mastermind advance monitoring available as an option for remote monitoring

Technical Specifications

  • Single surge rated and tested
  • Extensive kA rating and voltage

Standards, Certifications, Classifications

  • UL listed 1449 5th edition for Type 1 and Type 2 applications
  • RoHS compliant
  • cUL
  • UL 1283
  • UL96A master label for lightning protection systems


  • Renewable energy
  • Motion
  • Food and beverage
  • Critical power facilities: Hospitals, Financial institutions, airports, data centers
  • Educational institutions
  • Wastewater treatment plants
  • Transportation
  • Oil, gas, and chemicals

Downloadable Resources

PX3 050 datasheet

PX3 080 datasheet

PX3 100 datasheet

PX3 125 datasheet

PX3 150 datasheet

PX3 200 datasheet

PX3 Installation & Operation Manual

PX3 Technical Specifications