HE1750 (AC Surge Protector, Modular w/ Remote Sensing)

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The HE1750 has been specifically designed for use on both type 170 and on NEMA controllers. Because of the high quality of this protector, it may be used as a stand-alone device without the use an external line filter. If an external line filter is required, it is recommended that a HESCO/RLS line filter be used.

The HE1750 (like the popular HE1800) is a multi-stage, high-energy suppressor that incorporates a sophisticated, inline EMI/RFI filter. The inline filter has been designed to effectively reject random noise and spikes from 10KHz to 25MHz. The primary and secondary clamp stages are separated by an inductive network; yet work together to give clamp voltages of under 395 volts at 20KA (8 x 20us).

The HE1750 also incorporates the use of warning/failure indicators in addition to remote sensing for monitoring by a central computer. If random data base memory loss or any other transient interference is effecting the safe operation of one or more of your intersections, the HE1750 surge protector will quickly and effectively eliminate the problem

Download Specifications Sheet (PDF}


Peak Surge Current (8x20us) 48KA
Life Test
<5% change in clamp voltage after 10 surges of 20KA (8x20uS)
Max Clamp Voltage 395VAC
Continuous Service Current 15 Amps Max.
Operating Temperature -40 to 85°C
Dimensions (Module Only) (in) 4.6 x 3.1 x 1.9
Mounting Aluminum Baseplate

*Unit was tested with neutral strapped to the ground terminal.


  • Modular Design
  • Multi-Stage Surge Arrestor
  • Effectively Protects Against Lightning and Other Power Surges
  • Dry Relay Contact Remote Sensing Circuit
  • Immediately Self-Restores After Each Surge
  • Led Warning / Failure Indicators