Combined Surge Protection for PoE Power and Ethernet Data Lines
LY21-2 is an inline RJ45 PoE surge protector designed to protect both Ethernet data signals and DC power transmitted through the same network cable. It is suitable for PoE cameras, wireless access points, IP phones, network terminals, and other powered Ethernet equipment operating on networks up to 100Mbps.
Combined protection for PoE power and Ethernet data pairs
Supports PoE power circuits up to 60V DC
Up to 100Mbps transmission with ≤0.2dB insertion loss
Compact IP20 design for network and control cabinets
Suitable Applications
LY21-2 is suitable for powered Ethernet equipment that requires coordinated protection of both DC power and network data lines.
PoE IP Cameras
Protects outdoor and indoor PoE cameras against surges entering through Ethernet cables.
Wireless Access Points
Suitable for PoE-powered wireless access points, outdoor bridges, and radio equipment.
IP Phones & Terminals
Protects PoE IP phones, access-control terminals, intercoms, and network endpoints.
PoE Switches & Injectors
Helps protect PoE switch ports, injectors, network cabinets, and connected powered devices.
FAQ
Common questions about LY21-2 RJ45 PoE network surge protector selection and installation.
What is the LY21-2 PoE surge protector used for?
LY21-2 is installed inline with an RJ45 PoE cable to protect both Ethernet data signals and DC power conductors from lightning-induced and switching transient overvoltage.
What is the difference between this model and the non-PoE LY21-2?
The PoE version protects both the data pairs and the DC power transmitted through the Ethernet cable. The non-PoE version is intended primarily for low-voltage network data protection.
Which PoE voltage can LY21-2 support?
The power section is listed for a maximum continuous operating voltage of 60V DC. Confirm the actual PoE standard, pair mode, supply voltage, and current before ordering.
What Ethernet speed does this model support?
The listed maximum transmission rate is 100Mbps. It should not be used for Gigabit Ethernet unless a separately tested Gigabit-compatible version is confirmed.
Where should the PoE surge protector be installed?
Install it inline and close to the protected PoE device. For outdoor cable runs, protection at both the outdoor equipment end and the building-entry end may be required.
What should be confirmed before ordering?
Confirm the PoE voltage, continuous current, Ethernet speed, powered-pair mode, RJ45 pin configuration, cable category, grounding method, indoor or outdoor location, and required surge-withstand level.
