ESP SL 3-Wire Series

The ESP SL 3-Wire Series is a combined Category D, C, B tested protector (to BS EN 61643) suitable for 3-wire signalling applications which require either a lower in-line resistance, an increased current and/or higher bandwidth. Also suitable for DC power applications less than 0.5 Amps.

Available for working voltages of up to 6, 15, 30, 50 and 110 Volts. For use at boundaries up to LPZ 0 to protect against flashover (typically the service entrance location) through to LPZ 3 to protect sensitive electronic equipment.

Features & benefits

  • Very low let-through voltage (enhanced protection to IEC/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
  • Ultra slim 7 mm width ideal for compact protection of large numbers of lines (e.g. process control installations)
  • Two stage removable protection module with simple quick release mechanism allowing partial removal for easy line commissioning and maintenance as well as full removal for protection replacement
  • Very low (1 Ω) in-line resistance allows resistance critical applications (e.g. alarm loops) to be protected
  • High (500 mA) maximum running current
  • High bandwidth enables higher frequency (high traffic or bit rate) data communications
  • Strong, flame retardant, polycarbonate housing
  • Built-in innovative DIN rail foot with locking feature for simple positioning and clip-on mounting to top hat DIN rails
  • 4 mm² terminals allow for larger cross section wiring, stranded wires terminated with ferrules or fitting two wires into a single terminal
  • Convenient earthing through DIN foot and/or earth terminal

More information

Select region / language