HE277 Highway Lighting Surge Protector

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The HESCO/RLS model HE277 surge arrester has been designed specifically for the highway lighting industry.  Utilizing solid-state design, the HE277 has proven to protect the most sophisticated of highway lighting systems in the industry today.

The HE277 surge arrester has been designed with the state tax dollars in mind.  With this unit, no longer do the individual states have to worry about protecting the investment the state tax payers have paid for the safety of the drivers in their states on federal highways.

Not only does this product protect in the common mode (line to ground), it also protects the neutral to ground.  Without this unit, the safety of drivers in your state would be at risk due to the failure of roadway lighting in critical areas of state highways.


Download Specifications Sheet (PDF}


Maximum Continuous Operating Voltage 320 VAC
Peak Surge Current (8x20us) 25kA
Maximum Clamp Voltage  840 VAC
Response Time <25ms
Operating Temperature -40°C to +85°C
Mounting Lead Supported
 Dimensions  3"L x 2"W x 1.5"H


  • LED Highway Lighting Surge Protection Device
  • Protects Against Lightning And Other Power Surges
  • Clamps Harmful Surges Quickly
  • Completely Weatherproof
  • Immediately Self-Restores After Each Surge
  • Line to Ground & Neutral to Ground Protection