Surge Protection

Surge Protection

Why Surge Protection


The 83904 SPD specifically for 120V furnace and air handler applications. The furnace and air handler contain components that must be protected from surges such as, ECM motors, Control Boards, Transformers. The MARS Surge utilizes thermally protected MOV technology for safe and reliable protection of equipment. The 120V Surge Device is easy to install with only 2 wires to connect.


  • Idea for 120v Ductless Systems
  • Furnace & Air Handlers
  • Inverter Boards
  • ECM Motors
  • Control Boards
  • Transformers
  • Relays
  • Sensors



  • Easy 2 wire installation
  • 10″ Pre-stripped Leads
  • Green LED Status Indicator
  • Thermally Protected MOVs
  • 120V Single Phase 50/60Hz
  • Short Circuit Current Rating: 10,000 Amps
  • MCOV L-N 150V
  • Voltage Protection Rating: L-N 700V
  • UL 1449 4th Edition
  • Type 1 or 2 Surge Protection Rating
  • 3 Year Warranty
  • $7,500 Connected Equipment Warranty