Cisco SFP-10G-T-X — 10GBASE-T SFP+ RJ-45 Copper Transceiver Module
What it is
SFP-10G-T-X is a Cisco 10GBASE-T SFP+ transceiver that lets a compatible SFP+ port connect to standard copper Ethernet cabling through an RJ-45 connector.
It supports 100 Mbps, 1 Gbps, and 10 Gbps Ethernet, making it useful when you need to connect a switch, router, server, or other network device over copper instead of fiber.
Why buyers pick SFP-10G-T-X (plain English)
Adds 10G copper to an SFP+ port: Useful when your switch has SFP+ slots but the device you need to connect has a standard 10GBASE-T RJ-45 interface.
Uses familiar Ethernet cabling: At 10Gbps, it works with Cat6A, Cat7, or better cabling for runs up to 30 meters.
Backward-speed support: The module can also operate at 100 Mbps and 1 Gbps on supported Cisco platforms.
No fiber required: Ideal for short rack-to-rack or device-to-switch connections where existing copper cabling is more convenient than installing fiber.
Hot-swappable: It can be inserted or replaced in a compatible SFP+ port without shutting down the host device.
60-second spec box (SFP-10G-T-X)
Interface
- SFP+ form factor
- 1 × RJ-45
- Copper Ethernet transceiver
- Hot-swappable
Supported speeds
- 100 Mbps
- 1 Gbps
- 10 Gbps
- Actual supported speeds can depend on the Cisco host platform
10Gbps cabling
- 10GBASE-T
- Cat6A / Cat7 or better
- Maximum reach: 30 meters
100M / 1Gbps cabling
- Cat5e / Cat6A / Cat7 or better
- Maximum reach: 100 meters
Power
- Up to 2.5W at 10Gbps
- Lower power consumption at 100M / 1Gbps
Connector
- Standard RJ-45
- Twisted-pair copper Ethernet
Compatibility
- Designed for compatible Cisco SFP+ / SFP28 ports
- Supported across selected Cisco Catalyst, Nexus, NCS, and other platforms
- Always verify the host platform's transceiver compatibility because some switches impose power or speed restrictions
Where it fits (and when to choose something else)
Perfect for:
- Connecting a 10GBASE-T server to an SFP+ switch
- Short 10G copper links inside a rack
- Connections between adjacent racks
- Reusing existing Cat6A cabling
- Situations where an RJ-45 interface is required but the switch only has SFP+ ports
Choose something else if:
- You need more than 30 meters at 10Gbps → use a fiber transceiver such as SFP-10G-SR
- You need long-distance single-mode fiber → choose SFP-10G-LR
- Both devices have SFP+ ports and are close together → a 10G DAC cable is usually simpler and lower power
- You only need 1Gbps copper → consider GLC-TE
- Your switch does not support the higher power requirements of 10GBASE-T SFP+ modules → use a supported optical or DAC alternative
TL;DR
SFP-10G-T-X is a Cisco 10GBASE-T SFP+ transceiver that converts a compatible SFP+ port to RJ-45 copper Ethernet, supporting 100M, 1G, and 10G speeds, with 10Gbps reach up to 30 meters over Cat6A/Cat7 cabling.
