SFP RJ45 1G Copper Transceiver OEM X120 — 1 Gigabit Ethernet SFP Module, RJ45 (T)

The SFP RJ45 1G Copper Transceiver OEM X120 is a compact 1 Gigabit Ethernet module in an SFP form factor that provides standard copper connectivity through an RJ45 port. Intended for installation in switches and routers with SFP slots, this module supports 1G links over Cat5e/Cat6 cabling and is suitable for uplinks, server connections and access ports where a removable SFP-style RJ45 interface is required.

Advantages

This SFP RJ45 transceiver offers hot-pluggable convenience, allowing network administrators to add or replace copper Ethernet ports without powering down equipment. The compact SFP form factor saves front-panel space and enables flexible port configuration on devices that support modular transceivers. The transceiver supports standard 1 Gigabit Ethernet operation over common copper cabling, making it compatible with existing Cat5e and Cat6 infrastructure and simplifying upgrades or mixed-media deployments.

Suitable for

• Creating 1 Gbps uplinks between switches
• Connecting servers or network appliances to switches via copper cabling
• Replacing fixed RJ45 ports with modular SFP-based copper ports
• Mixed-media networks that combine fiber and copper SFP modules

When it may not be suitable

This transceiver supports only 1 Gigabit Ethernet and is not intended for multi-gigabit rates such as 2.5G, 5G or 10G. It requires a compatible SFP slot on the host device; it will not fit or operate in ports designed exclusively for other transceiver types (for example fixed RJ45 connectors or SFP+ slots that do not support 1G SFP modules). Environments demanding fiber connectivity, long-distance links, or higher-speed uplinks should use the appropriate fiber or higher-speed copper modules.

Key specifications

• Form factor: SFP (small form-factor pluggable)
• Interface: RJ45 copper port
• Data rate: 1 Gbps (full duplex)
• Cabling: Cat5e/Cat6 copper cabling
• Connector type: Standard 8P8C (RJ45)
• Operation: Hot-pluggable
• Application: Ethernet uplinks, server links, access ports

How to use

Insert the SFP RJ45 transceiver into a compatible SFP slot on your switch or router until it latches. Connect a standard Cat5e or Cat6 RJ45 patch cable between the transceiver and the remote device. The host device should detect the module and negotiate a 1 Gbps link automatically if auto-negotiation is enabled on both ends. Monitor link LEDs and the host system’s interface status to confirm operation. To remove the module, disengage any retention mechanism and pull the transceiver straight out while the device is powered down or following the vendor’s hot-swap procedures.

What to consider before purchase

• Confirm that the target switch or router supports 1G SFP copper transceivers in its SFP slots.
• Verify compatibility with the device vendor and firmware version if vendor-specific checks are required.
• Ensure existing cabling meets Cat5e/Cat6 standards for reliable 1 Gbps links.
• Check physical space and module count if multiple SFP modules will be used in the same chassis.

Usage recommendations

Use shielded or properly routed cabling in electrically noisy environments and keep cable runs within recommended lengths for copper Ethernet. When deploying multiple transceivers, verify link negotiation settings and monitor interface statistics to detect duplex or speed mismatches. Follow the equipment vendor’s guidelines for firmware and compatibility to ensure stable operation.