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Furse ESP 5A/BX and 16A/BX Series

Combined Type 2 and 3 tested protector (to BS EN 61643-11) for use on low current (up to 5 or 16A) single phase systems to protect connected electronic equipment from transient overvoltages on the mains supply, e.g. fire/intruder alarm panels.

Protectors with /BX suffix come ready-boxed, to IP66, for use in dirty or damp environments. Available for 90-150 volts, 200-280 volts and 232-350 volts supplies. For use at boundaries LPZ 1 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 sets of conductors (phase to neutral, phase to earth, neutral to earth - Full Mode protection) allowing continuous operation of equipment
  Repeated protection in lightning intense environments
  Compact size for easy incorporation in the protected system
  Removable DIN rail foot for simple clip-on mounting to top hat DIN rails (unboxed versions)
  Colour coded terminals give a quick and easy installation check - grey for the dirty (line) end and green for the clean end
  Available ready-boxed to IP66 for use in dirty or damp environments (protectors with /BX suffix)
  Robust housing and substantial earth stud
  Fixing holes ready for flat mounting
  Maintenance free
  ESP 240-5A/BX has Network Rail Approval PA05/02896. NRS PADS reference 087/037285

Data Sheet


Use these protectors on low current mains power supplies, e.g. CCTV cameras, alarm panels and telemetry equipment.


If several ESP 120-5A or 16A, ESP 240-5A or 16A or ESP 277-5A or 16A protectors are to be installed together, or if one is in use alongside Lightning Barriers for video or signal lines, these can be simultaneously mounted and earthed on a CME kit and housed in a suitable WBX enclosure.


  ESP 120-5A
  ESP 120-16A
  ESP 240-5A
  ESP 240-16A
  ESP 277-5A
  ESP 277-16A
  ESP 120-5A/BX
  ESP 120-16A/BX
  ESP 240-5A/BX
  ESP 240-16A/BX
  ESP 277-5A/BX
  ESP 277-16A/BX

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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