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Furse ESP D and TN Series

Combined Category D, C, B tested protector (to BS EN 61643-21) suitable for most twisted pair signalling applications. Available for working voltages of up to 6, 15, 30, 50 and 110 volts. ESP TN suitable for Broadband, POTS, dial-up, T1/E1, lease line and *DSL telephone applications. For use at boundaries up to LPZ 0A to protect against flashover (typically the service entrance location) through to LPZ 3 to protect sensitive electronic equipment.

Features and Benefits

  Very low let-through voltage (enhanced protection to BS EN 62305) between all lines - Full Mode protection
  Full mode design capable of handling partial lightning currents as well as allowing continual operation of protected equipment
  Repeated protection in lightning intense environments
  Low in-line resistance minimises unnecessary reductions in signal strength
  Strong, flame retardant, ABS housing
  Supplied ready for flat mounting on base or side
  Built-in DIN rail foot for simple clip-on mounting to top hat DIN rails
  Colour coded terminals give a quick and easy installation check - grey for the dirty (line) end and green for the clean end
  Screen terminal enables easy connection of cable screen to earth
  Substantial earth stud to enable effective earthing
  Integral earthing plate for enhanced connection to earth via a CME kit
  ESP 06D and ESP 50D have PADS reference 086/000551 (ESP 06D) and 086/000553 (ESP 50D)
  ESP TN is suitable for telecommunication applications in accordance with Telcordia and ANSI Standards (see Application Note AN005)

Data Sheet


Use on twisted pair lines, e.g. those found in process control equipment, modems and computer communications interfaces.


Connect in series with the data communication or signal line either near where it enters or leaves the building or close to the equipment being protected (e.g. within its control panel). Either way, it must be very close to the systems earth star point. Install protectors either within an existing cabinet/cubicle or in a separate enclosure.


  ESP 06D
  ESP 15D
  ESP 30D
  ESP 50D
  ESP 110D

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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