Reliable Surge Protection for RJ45 Ethernet Data Lines
LY21-2 is an inline RJ45 network surge protector designed to help protect switches, servers, modems, network terminals, controllers, and other Ethernet-connected equipment from transient overvoltage entering through data cables. It supports network transmission rates up to 100Mbps with insertion loss of no more than 0.2dB.
Inline protection for RJ45 Ethernet data connections
Supports transmission rates up to 100Mbps
Low insertion loss of no more than 0.2dB
Compact IP20 design for control and network cabinets
Suitable Applications
LY21-2 is suitable for non-PoE RJ45 network and communication lines that require surge protection without significantly affecting data transmission.
Network Switches
Helps protect Ethernet switch ports and connected network equipment from surges entering through data cables.
Servers & Modems
Suitable for server network ports, routers, modems, gateways, and network termination equipment.
Industrial Ethernet
Protects Ethernet communication lines in automation cabinets, production equipment, and monitoring systems.
Non-PoE IP Systems
Suitable for non-PoE IP cameras, access-control devices, alarm panels, and network monitoring equipment.
FAQ
Common questions about LY21-2 RJ45 network signal surge protector selection and installation.
What is the LY21-2 RJ45 surge protector used for?
LY21-2 is installed inline with an RJ45 network cable to help prevent lightning-induced and switching transient overvoltage from reaching switches, servers, modems, controllers, and other network equipment.
Is this model suitable for PoE equipment?
The current product FAQ identifies this version as a non-PoE data-line surge protector. For PoE cameras or powered Ethernet devices, select a PoE-compatible SPD with the correct power voltage, current, wiring mode, and data rate.
What network speed does LY21-2 support?
The listed maximum transmission rate is 100Mbps. It should not be selected for Gigabit Ethernet unless a separate tested Gigabit-compatible version is confirmed.
Will the surge protector affect network performance?
Its listed insertion loss is no more than 0.2dB. Actual compatibility should still be checked against the network speed, cable category, cable length, impedance, and connected equipment.
How should LY21-2 be installed?
Install it inline with the Ethernet cable and as close as practical to the protected network equipment. Follow the input and protected-side markings and provide a short, direct grounding connection where required.
What should be confirmed before ordering?
Confirm whether the line is PoE or non-PoE, the Ethernet speed, operating voltage, protected pin configuration, cable category, interface direction, grounding method, installation location, and required surge withstand level.
