The Ubiquiti UACC-CM-RJ45-MG, released in 2022 as part of the UniFi accessory lineup, is a compact copper transceiver module that converts SFP+ or SFP ports to RJ45 Ethernet, enabling flexible multi-gigabit connectivity in UniFi networks without fiber.

It supports auto-negotiating data rates from 1 Gbps to 10 Gbps, delivering full 10G performance up to 100m via Cat6A cabling, with backward compatibility for older 1G/2.5G/5G setups.

Featuring a robust stainless steel and copper construction for durability, it draws just 1.9W max power from the host device, operates reliably from 0°C to 70°C, and integrates plug-and-play with UniFi switches like USW-Pro series or UDM Pro.

Its hot-swappable design simplifies upgrades in rack environments, though it requires compatible SFP ports and excludes the Ethernet cable.

Strengths include EMI-resistant copper transmission and broad interoperability, but it's limited to short-range copper (not optical) and may run warm under sustained 10G loads—perfect for cost-effective hybrid fiber/copper backbones in SMB or enterprise deployments.