BackCoaxial RF SPD
This series provides a complete range of coaxial protection to CCTV / Tower equipment/GPS/Base station, etc. The products have great performance, which is high discharge capacity/low voltage protection level/low insertion loss / low let-through voltage / low let-through energy, and multi-interface for options.

Spark gap SPD, with built-in GDT, performs as low-pass filter, which is suitable for applications where DC is carried through the coax cable such as remote amplifiers, LNA’s and antenna power supply. Due to its superior RF performance it is also good for for IEEE 802.11a and other 5.2-5.8 GHz ISM and UNII applications, as well as 3.5 GHz WLL applications. According to the characteristics of the GDT and the ingenious internal structure design, the fire risk is minimized and the stability of signal transmission is ensured. The spark gap type RF SPD supports the GDT replacement.


The 1/4λ SPD can also be considered as a signal band-pass filter, which can only be transmitted when the signal is in the specified frequency range (such as 800 MHz ~ 2.5 GHz or 2.0 GHz ~ 6.0 GHz). Due to the low-frequency characteristics of lightning interference, SPD shows short circuit when lightning strikes and low-frequency surge pass through, and discharge energy to the ground. This SPD is a non-GDT design, with great discharge capability and short response time, which makes it widely used and maintenance free. The SPD housing is directly grounded and both interfaces are equally protected, and making installation easier.

Note: The 1/4λ SPD is not suitable for coaxial cables with DC voltage, such as remote amplifiers or LNAs.


Customization is negotiable.


  • PD N...-10FM

    High performance GDT SPD with N male/female interface used for transmission protection up to 6 GHz, such as IEEE 802.11a, 5.2-5.8 GHz ISM, etc.

  • PD N180-10FMR

    High-performance GDT(replaceable) SPD with N male/female interface used for transmission protection up to 3 GHz, such as IEEE 802.11a, IEEE 802.11g, wireless LAN, ISM, MMDS, PCS, etc.

  • PD N0-0FM

    High performance 1/4λ SPD with N male/female interface used for transmission ranged 0.8~2.5 GHz,such as DAS, wireless LAN, etc

  • PD D180-10FMR

    High-performance GDT(replaceable) SPD with 7/16 DIN male/female interface used for transmission protection up to 3 GHz, such as IEEE 802.11a, IEEE 802.11g, wireless LAN, ISM, MMDS, PCS, etc.

  • PD D0-0FM

    High performance 1/4λ SPD with 7/16 DIN male/female interface used for transmission ranged 0.8~2.5 GHz, such as DAS, wireless LAN, etc