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Small rectangular SFP transceiver with RJ45 port and silver metal casing

Mikrotik

Mikrotik S-RJ01 SFP RJ45 10/100/1000M copper transceiver

SKU CH-JFNP-XG1VY

Adds an RJ45 copper port to an SFP slot for 10/100/1000M links up to 100m

  • Device TypeTransceiver
  • Gigabit copper connectivity via standard SFP ports
  • 25 Gb/s bi-directional throughput over 100 m cable runs
  • Hot-pluggable SFP footprint with 3.3 V single supply
  • Operates reliably from 0 °C to 85 °C case temperature
  • Compatible with CCR and CRS series routers and switches

Copper SFP Transceiver for Gigabit Links

The Mikrotik S-RJ01 converts an SFP port to a standard RJ45 connection running at 10, 100 or 1000 Mbps. It draws power from a single +3.3 V rail and operates across a 0 °C to 85 °C case temperature range. Network engineers use it to extend copper runs up to 100 metres over unshielded twisted pair.

Sustained 1.25 Gb/s Operation

The module maintains up to 1.25 Gb/s bi-directional throughput under continuous load without throttling. IEEE 802.3 compliance and SFP MSA mechanical specs ensure stable signalling in compatible switches and routers. Hot-pluggable insertion allows link changes without interrupting adjacent ports.

Upgrade Path from Fibre-Only Ports

This transceiver replaces a fibre SFP when copper cabling is already installed or preferred for short runs. It fits Cloud Core Routers, Cloud Router Switches, RB2011 and RB260GS series hardware; CRS226 and CRS210 models are not compatible. The jump is worthwhile when re-cabling with fibre is impractical.

Highlights

  • Gigabit copper connectivity via standard SFP ports
  • 25 Gb/s bi-directional throughput over 100 m cable runs
  • Hot-pluggable SFP footprint with 3.3 V single supply
  • Operates reliably from 0 °C to 85 °C case temperature
  • Compatible with CCR and CRS series routers and switches

Specifications

Device TypeTransceiver

Questions about this item

How much power does the S-RJ01 draw when running continuously at 1.25 Gb/s?

The module operates from a single +3.3 V supply and stays within the SFP MSA power budget for copper transceivers.

What host equipment is required for the S-RJ01 to function?

It needs a networking device with a standard Gigabit SFP cage that accepts hot-pluggable modules.

Will the S-RJ01 work in a CRS226 or CRS210 switch alongside older RB2011 units?

CRS226 and CRS210 models are not compatible; it works with Cloud Core Routers, Cloud Router Switches, RB2011 series and RB260GS series.

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