Description
OBO Bettermann ND-CAT6/E-F Net Defender CAT6 Surge Protection Device
Product Overview
The OBO Bettermann ND-CAT6/E-F is a professional surge protection device for high-speed Ethernet networks up to 1 Gbit/s, designed to protect network equipment and data cabling against transient overvoltages and surge events. It is part of OBO Bettermann’s Net Defender range and is specifically designed for CAT6 / Class E networks.
The device provides fine protection for all 8 conductors plus cable shielding and features RJ45 8(8) connections for straightforward integration into Ethernet infrastructure. It is particularly suitable for Gigabit Ethernet, 10/100 Mbit Ethernet, PoE applications, and IP camera systems.
The ND-CAT6/E-F supports Power over Ethernet (PoE/PoE++) applications up to 1 A, while maintaining tested transmission performance for networks up to 1 Gbit/s. Installation is simplified through its plug-in design, and the package includes a DIN-rail mounting set and grounding cable.
Key Features
- Professional Ethernet surge protection
- Designed for networks up to 1 Gbit/s
- Compatible with CAT6 / Class E
- RJ45 8(8) connection system
- Protection for 8 wires + shield
- Fine surge protection
- Supports PoE / PoE++ applications up to 1 A
- Low protection level under high current loads
- Direct shielding connection
- Grounding through DIN rail or connection cable
- Plug-in installation
- Includes DIN-rail mounting kit
- Includes grounding cable
- Suitable for IP camera systems
- Aluminium housing
- Operating temperature from -40°C to +80°C
High-Speed Ethernet Protection
The OBO ND-CAT6/E-F is designed to protect high-speed Ethernet communication lines against transient electrical surges while maintaining reliable data transmission.
It supports CAT6 / Class E transmission performance up to 1 Gbit/s, making it suitable for modern Ethernet networks where both network performance and equipment protection are important.
Typical applications include:
- Gigabit Ethernet
- 10/100 Mbit Ethernet
- CAT6 structured cabling
- IP surveillance networks
- Network switches
- Ethernet-connected equipment
- PoE infrastructure
Protection for IP Camera Systems
The ND-CAT6/E-F is particularly useful in IP CCTV installations, where Ethernet cables can provide both network connectivity and power to cameras.
The device can be installed on Ethernet lines serving:
- IP Cameras
- PoE Cameras
- Network Video Recorders
- PoE Switches
- Access Points
- Network Controllers
- Other Ethernet-based security equipment
OBO specifically identifies IP camera systems and PoE applications among the intended applications for this product.
PoE and PoE++ Support
The ND-CAT6/E-F supports Power over Ethernet applications up to 1 A, allowing it to be integrated into Ethernet infrastructure where power is transmitted alongside data.
This makes it suitable for protecting PoE-connected devices without requiring a separate protection solution for the power and data conductors.
Fine Surge Protection
The ND-CAT6/E-F is classified as a fine protection device, protecting all eight conductors and the cable shield.
Its surge protection characteristics include:
- Protection level line-to-line: <40 V
- Protection level line-to-earth: <900 V
- Total discharge current: 5 kA (8/20 μs)
- Maximum continuous DC voltage: 58 V
- Maximum continuous AC voltage: 41 V
The device is classified as Type 2+3 / C2+C1 according to IEC 61643-21 and is designed for LPZ 1 → 3 protection zones.
RJ45 Connectivity
The protection device uses standard RJ45 8(8) connections, allowing straightforward integration into Ethernet cabling.
It provides protection across all eight Ethernet conductors and includes a direct connection for the cable shield.
Easy Installation
The plug-in construction allows quick installation into the network infrastructure.
The product includes:
- DIN-rail fastening set
- Grounding cable
- RJ45 connections
- Plug-in design
Grounding can be achieved through the DIN rail or connection cable, providing flexibility when integrating the device into existing electrical and network cabinets.
Robust Aluminium Construction
The ND-CAT6/E-F features an aluminium housing with a silver-grey RAL 7001 finish.
It is designed for installation in network cabinets and other protected infrastructure environments, with an operating temperature range of -40°C to +80°C.

