F Female to F Female Lightning Arrester - DC - 3 GHz

Product Overview

The F Female to F Female lightning arrester is designed for 75 ohm coaxial routes where a direct F-type inline connection and a dedicated surge-to-earth path are required. It supports a DC - 3 GHz passband and is suited to wall-plate entries, set-top box inputs, multiswitch installations, and similar distribution lines. A 90 V gas discharge tube is installed inside the body. During ordinary signal transmission, the tube stays in a high-impedance state so that RF energy continues through the F Female to F Female lightning arrester with a reference insertion loss of 0.2 dB.

If a lightning-related transient reaches the cable, the GDT changes from its normal non-conductive condition and sends the excess energy toward the ring-terminal ground connection. This F Female to F Female lightning arrester therefore works with, rather than independently from, the building or site earthing arrangement. The low-capacitance GDT design is useful for broadband coaxial paths, while its serviceable discharge component can be checked following a substantial event. A diode product may operate at a different threshold, but this lightning arrester is intended for systems that need low RF loading and an externally grounded surge path.

Protection Mechanism and Construction

• Surge element: The F Female to F Female lightning arrester contains a 90 V gas discharge tube with a 10 kA rating on the 8/20 us waveform. The internal element is accessible for replacement after testing, without replacing the entire inline unit.
• Ground route: The side-mounted ring terminal links the lightning arrester to the earth bar. A short, suitably sized grounding lead helps reduce inductance in the discharge route.
• Housing: The inline body is machined brass with corrosion-resistant plating. This construction supports installation at wall plates, indoor distribution points, equipment cabinets, and cable entry locations.
• Connector interface: F Female to F Female ports connect compatible 75 ohm coaxial assemblies on both sides. Installers should use the applicable F connector tightening guidance.

Reference Technical Specifications

The following details identify the reference version of this F Female to F Female lightning arrester. Verify the final production configuration before treating the values as project-specific requirements.

All figures shown are reference specifications for this protection family and should be confirmed for the selected configuration.

Engineering Comparison

• Quarter-wave alternatives: A quarter-wave approach is usually matched to a narrower operating range. This lightning arrester covers DC through 3 GHz, helping support coaxial installations that handle multiple signals within the listed passband.
• Diode-based protectors: Diode circuits can have different clamping behavior, while added capacitance can affect higher-frequency response and available power margin. This GDT lightning arrester has a stated 0.2 dB insertion loss and 60 W reference CW handling.
• DC-block components: A DC block can interrupt DC continuity but does not by itself establish an earth route for high-energy surge current. The grounding terminal of this lightning arrester is provided for that purpose.

Applications

• Wall plate entries: Place the lightning arrester where a 75 ohm coaxial cable enters a room, cabinet, or protected equipment zone to provide a grounded transition point.
• STB and receiver inputs: The F Female to F Female lightning arrester can be installed in front of a set-top box or receiver input when an external coaxial run enters the installation.
• Multiswitch distribution: Use the inline lightning arrester on satellite, TV, or related distribution paths where compatible 75 ohm coaxial interfaces are required.
• Equipment and service setups: The unit can also be fitted at a test, monitoring, or equipment connection where longer cable runs may introduce transient exposure.

Installation and Grounding Notes

• Keep grounding direct: Connect the ring terminal to the earth bar with the shortest practical conductor. Unnecessary length can raise inductance in the lightning arrester grounding path.
• Select the installation point: Position the inline lightning arrester at the cable entry, wall plate, or other location covered by the broader lightning-protection arrangement.
• Protect connector joints: Tighten each F-type interface correctly. Where the coaxial line is exposed outdoors, use suitable weatherproofing around the connector area.

OEM and B2B Support

• Configuration support: Connector arrangements, 90 V or 230 V discharge options, and special plating are available for volume orders.
• Assembly options: Factory-terminated jumper leads with the lightning arrester pre-installed can be supplied for simplified deployment.
• Packaging and marking: Individual protective packaging, custom labels, and batch test documentation are available on request.

FAQ

Q: When should the gas discharge tube be inspected?

A: Inspect or test the 90 V tube after a significant surge event. If leakage or hold-off performance is not acceptable, replace the tube rather than the complete lightning arrester.

Q: Does the unit change the RF signal path?

A: The reference figures are 0.2 dB insertion loss and a maximum VSWR of 1.3 across the DC - 3 GHz range, which supports compatible 75 ohm coaxial applications.

Q: Can this lightning arrester be used indoors?

A: Yes. It may be mounted near a wall entry, distribution device, or equipment input when it is connected to an effective earth system. Before installation, check the lightning arrester mounting position, lightning arrester connector compatibility, lightning arrester ground lead, lightning arrester earth-bar connection, lightning arrester weather sealing, lightning arrester cable route, lightning arrester discharge-tube condition, lightning arrester frequency suitability, lightning arrester installation spacing, lightning arrester continuity, and lightning arrester inspection record and lightning arrester final installation check for the installation.