This device is used in Line-to-Line (also known as across-the-line) applications where DC power feeds are run throughout the Signal House with limited exposure to the outside elements. It is also an excellent protector for regulated DC Power Supplies, and in that application multiple Model SSS-T516s would be mounted and wired as close as possible to the power supply. The Model SSS-T516NI should be used liberally throughout the Houses / Cases as part of the Site-Specific Solutions "Distributed Protection Architecture".

The Model SSS-T516NI is electrically identical to the Model SSS-T516, but have a more versatile lead dress with different accommodating lead lengths and terminations. The lead wires are left bare (no Teflon tubing), the terminals are open spade lugs for easy replacement, and the center-to-center spacing is determined by the application.

These are not to be used as Line-to-Ground protectors.

Please consult Site-Specific Solutions to determine the right device for your application.

Downloadable and printable product page (PDF)



Electrical Specifications:

  • Reverse Stand-off Voltage = 16VDC
  • Energy Handling Capability = 5 Joules (5000 Watts for 1ms)
  • Voltage Range to Initiate 5mA DC Conduction = 17.8 to 19.7 VDC
  • Maximum Peak Pulse Current = 192 Amperes (10x1000μS waveform)
  • Maximum DC Clamping Voltage @ Peak Pulse Current = 26 Volts Peak


  • Rugged Heavy Lead Construction
  • center-to-Center mounting 2-1/2" to accommodate standard arrester terminal block mounting, or set to application requirement
  • Spade Lug Terminals for easy installation and replacement
  • Line-to-Line Secondary / Tertiary Level Protection for a nominal 12VDC Source
  • Not to be used as a primary stage protector
  • Not to be used as a Line-to-Ground protector
  • Custom adaptations available

Site-Specific Solutions, Inc. © 2017
About Us

Request a Quote

Contact Us
Site-Specific Solutions, Inc.
929 McLaughlin Run Road
Bridgeville, PA 15017