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LDU is a 100% owned Australian company with a strong reputation for supplying and installing the best high quality lightning protection systems across Australia, New Zealand and South East Asia regions. At LDU, we provide turnkey solutions for all of your lightning protection and earthing projects.

Intellegent Surge Protection

Coaxial Surge Protectors

The GATEKEEPER range of Coaxial Surge Protectors (GKCP) contain a high-speed gas filled surge arrestors which clamp the over voltage limiting the residual voltage for fast rise time transients. The use of low capacitance gas filled arrestors ensures operation at high frequencies with low insertion loss. The GKCP is available in either an inline or bulkhead configuration with the appropriate connectors on each end.

The device is designed to minimise circuit capacitance and present a 50 or 75-ohm impedance so that performance up to 2.1 GHz is assured.




  • Optimal transmission performance
  • Simple installation
  • High impulse carrying capacity
  • Stainless Steel Casing

Ranges available:


N-Type    F-Type    BNC    CCTV    Stud    UHF    TNC


  • Male to Femail, Female to Female connectors
  • in line and Bulkhead mounting


Standard models provide protection up to 50W power level. Models for higher power levels are readily available on request.



Download our Datasheet