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Furse ESP D/BX Series

Combined Category D, C, B tested protector (to BS EN 61643-21) based on the ESP D Series and ESP TN but ready boxed to IP66 for use in damp or dirty environments. 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
  Ready-boxed to IP66 and supplied ready for flat mounting
  Available with screw terminals or with IDC terminals (by adding /I suffix to part number)
  Colour coded terminals for quick and easy installation check - grey for the dirty (line) end and green for clean
  Screen terminal enables easy connection of cable screen to earth
  Substantial earth stud to enable effective earthing
  ESP TN/BX and ESP TN/2BX are suitable for telecommunication applications in accordance with Telcordia and ANSI Standards (see Application Note AN005)
  Supplied as standard with screw terminals - for IDC terminals order part code plus /I (e.g ESP TN/BX/I)
  ESP TN/BX has Network Rail Approval PA05/02877 NRS PADS reference 087/037286

Data Sheet


Use these ready-boxed protectors on twisted pair lines in dirty or damp environments.

For two wire lines, use /BX versions. For four wire lines, use /2BX versions.


Connect in series with the data communication, signal or telephone line either near where it enters/leaves the building or close to the equipment being protected. Either way, it must be very close to the systems earth star point.


  ESP 06D/BX
  ESP 15D/BX
  ESP 30D/BX
  ESP 50D/BX
  ESP 110D/BX
  ESP 06D/2BX
  ESP 15D/2BX
  ESP 30D/2BX
  ESP 50D/2BX
  ESP 110D/2BX

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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