75 ohm BNC Male to 75 ohm BNC Female Lightning Arrester - DC - 3 GHz

Product Overview

This 75 ohm BNC Male to 75 ohm BNC Female lightning arrester is an in-line RF surge protection device for 75 ohm signal paths. It uses a replaceable 90 V gas discharge tube (GDT) to direct lightning-induced energy and other transient events toward the grounding point before they reach connected equipment. In normal service, the GDT remains high impedance so the signal path stays available for RF transmission from DC to 3 GHz. The stated insertion loss is 0.2 dB, helping this 75 ohm BNC Male to 75 ohm BNC Female lightning arrester fit signal installations where attenuation and connector compatibility both matter.


The GDT-based design keeps capacitance low for broad-band use. After a significant surge, the replaceable tube can be inspected and changed if required. Its 90 V element and 10 kA (8/20 us) surge rating support a grounded 75 ohm BNC signal path.

Protection Mechanism and Construction

• Protection Element: The protection stage is a 90 V gas discharge tube rated for 10 kA using the 8/20 us waveform. When a surge exceeds the tube threshold, the element conducts and sends the transient toward the grounding connection. The tube is positioned in the central body for service access, allowing replacement without removing the entire 75 ohm BNC Male to 75 ohm BNC Female lightning arrester from the cable route.
• Grounding Path: A side-mounted ring terminal provides the connection to an earth bar. Ground lead length, routing, and inductance influence the amount of surge energy that can remain on the equipment side, so the grounding conductor should be direct and practical for the installation.
• Body: The in-line housing is machined brass with corrosion-resistant plating. This construction supports direct installation at a panel, bulkhead, cable entry location, or equipment-side connection point.
• Connector Interface: The unit combines a 75 ohm BNC male connector with a 75 ohm BNC female connector, enabling connection to standard 75 ohm BNC cable assemblies without an adapter.

Reference Technical Specifications

The following values describe the referenced configuration of this 75 ohm BNC Male to 75 ohm BNC Female lightning arrester. Confirm the required configuration against the final production version before specifying it for a project.

These values are reference information for this protection family. Final selection should follow the actual system design, installation conditions, and confirmed production configuration.

Engineering Comparison

• vs. Quarter-Wave Stub: Specified from DC to 3 GHz for broad-band 75 ohm applications.
• vs. Diode-Based Protector: The GDT arrangement supports the stated 0.2 dB insertion loss and 60 W reference power capability.
• vs. DC Block Surge Protector: The GDT creates an earth path for surge diversion.

Applications

CCTV and IP camera, video surveillance, broadcast: For CCTV and IP camera surge protection, this 75 ohm BNC Male to 75 ohm BNC Female lightning arrester can be installed in a 75 ohm line to help route induced transient energy away from connected radio or monitoring equipment.

• Tower and Rooftop Installations: The arrester may be placed where a cable enters a shelter, cabinet, or protected equipment area. A short, properly arranged connection to the earth bar supports the intended surge-current path.
• Multi-Band Radio Sites: The DC - 3 GHz reference passband allows the same connector format to be considered for legacy and current signal bands where the 75 ohm interface is required.
• Equipment Racks and Test Systems: At an equipment input, the 75 ohm BNC Male to 75 ohm BNC Female lightning arrester can serve as a protection point for modules and instruments connected through longer cable runs.

Installation and Grounding Notes

• Grounding First: For CCTV and IP camera surge protection, connect the grounding lug to the earth bar with the shortest practical lead. Excess lead length or a poorly routed ground conductor can increase inductance and reduce the effectiveness of the surge path.
• Mounting: Install the in-line body in the intended cable path with the grounding point accessible. Keep the unit within the protected area defined by the site lightning-protection arrangement.
• Torque and Sealing: Tighten the BNC connections according to the connector manufacturer guidance. Where the connector interface is exposed outdoors, apply appropriate weatherproofing tape or a weather boot.

OEM and B2B Support

• OEM Customization: Custom connectors, 90 V or 230 V options, and special plating are available for volume orders.
• Cable Assembly Options: Factory-terminated jumper assemblies can be supplied.
• Packaging and Marking: Custom labeling and batch test reports are available on request.

FAQ

Q: How often does the gas discharge tube need replacement?

A: The 90 V tube is rated for 10 kA (8/20 us). Following a major surge event, test the tube as part of normal maintenance. If leakage is present or the hold-off test is not met, the tube can be replaced without replacing the complete arrester body.

Q: Will this 75 ohm BNC Male to 75 ohm BNC Female lightning arrester affect my DC - 3 GHz signal?

A: The reference insertion loss is 0.2 dB and the stated maximum VSWR is 1.3 across the DC - 3 GHz passband. These values indicate limited RF impact when the product is applied in a compatible 75 ohm antenna-line or signal-line installation.

Q: Can I use this arrester indoors?

A: Yes. It can be used at an equipment-side connection or building entry point with an appropriate grounding path and 75 ohm BNC connection.