Surge Protector for Video Line EWIMAR LHD-8R-EXT-FPS with MOSFET Fuse for AHD / HD‑CVI / HD‑TVI

EWIMAR LHD-8R-EXT-FPS is a surge protector designed for video transmission lines that use AHD, HD‑CVI and HD‑TVI signal formats. Intended for external CCTV installations, the device combines gas discharge or transient suppression elements with a MOSFET fuse that allows controlled disconnection during large overvoltage events. The unit helps protect cameras, recorders and associated video equipment from transient surges and lightning-induced spikes while maintaining signal integrity for high-definition analog video links.

Advantages

The product provides coordinated surge protection for the video pair and power line with a MOSFET-based fuse that disconnects under extreme surge conditions to prevent downstream damage. It is built for outdoor use and designed to preserve video signal quality across AHD, HD‑CVI and HD‑TVI systems. Installation and replacement are straightforward, and the device reduces the risk of costly repair or equipment loss caused by transient overvoltages.

Suitable for

• Outdoor CCTV camera lines using AHD, HD‑CVI or HD‑TVI video formats
• Video systems where transient protection is required to protect recorders and cameras
• Installations near areas with higher lightning or surge exposure (rooftops, poles, perimeter fences)
• Upgrades to existing analog HD video cabling to add surge protection without altering signal format

When it may not be suitable

This surge protector is specifically designed for AHD, HD‑CVI and HD‑TVI analog high-definition video lines; it is not intended for digital network (IP) camera data lines such as Ethernet. It also does not replace primary grounding, bonding or lightning protection systems and will not prevent damage from direct lightning strikes. Systems that require integrated PoE surge protection should verify compatibility before installation.

Key specifications

• Supported video formats: AHD, HD‑CVI, HD‑TVI
• Protection elements: surge suppression with MOSFET fuse for controlled disconnection
• Application: external/outdoor CCTV video line protection
• Function: transient overvoltage protection for camera and recorder signal lines while preserving video quality

How to use

Mount the surge protector in line with the video coaxial or balanced video pair between the camera and the recorder or junction box, following manufacturer mounting recommendations for outdoor enclosures. Ensure correct polarity and connector type matching to maintain proper signal flow. Provide a proper earth/ground reference according to site grounding practices to ensure the protector can divert surge energy safely. After a major surge incident, inspect the unit and replace it if the MOSFET fuse has activated or if visible damage is present.

What to consider before purchase

• Confirm compatibility with the video format in use: AHD, HD‑CVI or HD‑TVI
• Verify that the protector supports the physical connector and cable type in your installation
• Plan for proper grounding and bonding on the site to ensure effective surge diversion
• Understand that this device is for video line protection and is not a substitute for whole-site lightning protection

Usage recommendations

Install the protector as close as practical to the protected equipment or at the outdoor feed point, ensure a short ground connection to a reliable earth reference, and inspect or test the unit following any severe surge event to confirm continued protection.