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The 10GBASE-T SFP+ to RJ-45 transceiver (for short 10GBASE-T SFP+) is an RJ45 electrical port module packaged in SFP+. Its core function is to provide a standard RJ45 Ethernet interface for switches, servers, or network cards that only have SFP+ optical ports, enabling them to connect to 10G networks through copper cables (twisted pair), just like using a regular computer network port.
Core Specification
| Model | 10GBASE-T SFP+ |
| boxed type | SFP+(10G version SFP) |
| interface type | RJ45 (female connector, i.e. Ethernet jack) |
| transmission rate | 10Gbps (10GBASE-T), Simultaneously compatible with multiple speeds such as 5G/2.5G/1G/100M |
| transmission medium | Cat6a/Cat7 Ethernet cable (10G speed)Cat5e Ethernet cable (when used with 1G speed reduction) |
| Maximum transmission distance | At 10Gbps speed: 30 meters (using Cat6a/Cat7 Ethernet)At a speed of 1Gbps: up to 100 meters (using Cat5e or above Ethernet cables) |
| power consumption | Typical: 1.8W -2.5W |
| Operating Temperature | Commercial grade: 0 ℃ to 70 ℃Industrial grade: -40 ℃ to 85 ℃ (such as Ubiquiti UF-RJ45-10G-I) |
| backward compatible | Support 100M/1G/2.5G/5G/10G multi rate |
| hot-swapping | support |
| Digital Diagnosis (DDM/DOM) | Partial model support |
| Main protocol standards | IEEE 802.3an（10GBASE-T）、SFP+ MSA |
Working Principle
The 10GBASE-T SFP+ transceiver module integrates advanced PHY chips internally, which not only support 10G rates, but also automatically negotiate and are backward compatible with 5G, 2.5G, 1G, and even 100M rates. When connected to 100Mbps or 1G devices, the module will automatically slow down and match, achieving seamless connection.
Some 10g sfp to rj45 models may not support automatic speed negotiation, and in this case, the speed needs to be manually configured on the switch port (such as forcing it to 1G), rather than allowing it to negotiate automatically. It is recommended to confirm the negotiation ability of the specific model when making a purchase.
Below we will compare the 10GBASE-T SFP+ transceiver with a regular 10G SFP module, such as SFP-10G-SR, to provide a more intuitive understanding of its working principle.
| Item | SFP-10G-SR | 10GBASE-T SFP+ |
| Transmission medium | optical fiber | Ethernet cable (copper cable) |
| Inside core component | Laser (VCSEL/DFB)+driver circuit | PHY chip (physical layer transceiver) |
| Signal conversion | Electrical signal → Optical signal → Electrical signal | Electric signal → Enhanced electric signal → Electric signal |
| Power consumption | Lower (about 1W) | High (about 1.8W-2.5W, due to the complex echo cancellation and signal processing required by the PHY chip) |
| Maximum distance (10G) | 300 m to 10 km (depending on fiber type) | 30 m |
| Applicable scenarios | Long distance interconnection of computer rooms | Short distance interconnection within/adjacent cabinets |
10GBASE-T SFP+ Application Scenarios
Connect the network cable to a pure SFP+ switch (core application)
When the core switch or server network card only has SFP+ optical ports, but needs to connect a device with only RJ45 network ports (such as firewalls, IPMI management ports), this is the most direct solution.
Upgrade existing copper cable wiring to 10G
If Cat6a network cables have already been deployed in the office or computer room, simply insert the module into the SFP+ ports at both ends to achieve 10G upgrade using the existing Ethernet cables without the need to lay new fiber optic cables.
Interconnection within short distance cabinets
For 10G connections within the same cabinet or within 30 meters between adjacent cabinets, this is a more economical choice than fiber optic solutions, avoiding the high cost of fiber optical patch cables and SFP+ modules.
Industrial and wide temperature scenarios
Some industrial temp transceiver, such as Ubiquiti UF-RJ45-10G-I, support wide temperature operation from -40 ℃ to 85 ℃ and can be deployed in harsh environments such as factories and outdoor cabinets.
Selection Precautions
The quality of network cables is crucial
- 10G speed: Cat6a or Cat7 network cables must be used for 10GBASE-T SFP+ transceiver. Poor quality or aging Cat5e/Cat6 network cables cannot stably carry 10G signals, which may result in speed reduction or packet loss.
- Length limit: Strictly follow the requirement of being within 30 meters, and signals will experience sharp attenuation beyond 30 meters.
- If 100 meter transmission is required: as we know that when the connection distance is within 30 meters, we can use a 10 G SFP module. When the distance is far like 30-100 meters and the bandwidth is less than 10G, then the 10G SFP module can slow down to 1G, at this time, we need use Cat5e network cables to ensure the transmission distance can reach about 100 meters.
Device compatibility verification
The power consumption of 10G SFP to RJ45 module is relatively high, and not all SFP+ports can be perfectly supported with all brands of devices. Some early or low-end devices may not be able to recognize or operate stably due to insufficient power supply or cooling design reasons. It is strongly recommended to conduct compatibility testing before bulk procurement.
Power consumption and heat dissipation
Compared to ordinary 10 G SFP modules (with a power consumption of about 1W), 10G SFP to RJ45 electrical port modules have higher power consumption (about 1.8W-2.5W). In high-density deployment (such as a switch with 48 electrical port modules plugged in), it is necessary to ensure that the device has sufficient heat dissipation capacity to avoid module instability caused by high temperatures.
Rate negotiation mode
- Most 10GBASE-T SFP+ transceivers support automatic negotiation (plug and play)
- Some 10G SFP+ models may require manual configuration of port speed (such as mandatory setting to 10G or 1G), it is recommended to consult the product manual in advance.
Compatible with brand references
According to market information, mainstream brands compatible with 10GBASE-T SFP+ transceiver modules include Cisco, Huawei, HPE, Juniper, Arista, Dell, MikroTik, Ubiquiti, TP Link, Netgear, etc. It is recommended to choose a third-party module that is clearly labeled as compatible with your device model when making a purchase. Yingda team will confirm this detail with you before sign a contract. Please rest assured.
Comparison of SFP RJ45 Transceivers
| Yingda model | Working temperature | Transmission rate | Standards | Network cable type | Max distance | Power consumption |
| SFP-RJ45-GE-TC (10/100/1000BASE-T SFP) | Commercial:0℃ ~ 70℃ Industrial:-40℃ ~ 85℃ | 10/100/1000M rate adaptive | IEEE 802.3, 802.3ab (10GBASE-T), SFP MSA | Cat5 | 100m | ≤ 1W |
| SFP-RJ45-GE-TG (1000BASE-T SFP) | Commercial:0℃ ~ 70℃ Industrial:-40℃ ~ 85℃ | 1000Mbps | IEEE 802.3ab (1000BASE-T ), SFP MSA | Cat5 | 100m | 0.5W – 1.5W |
| SFP-RJ45-GE-T (10GBASE-T SFP+） | Commercial:0℃ ~ 70℃ Industrial:-40℃ ~ 85℃ | 10GBASE | IEEE 802.3an (10GBASE-T), SFP+ MSA | Cat6a | 30m | 1.8W-2.5W |
Conclusion
10GBASE-T SFP+ is an “RJ45 to SFP+ converter” that converts the SFP+ optical port of a switch into a standard 10G electrical port. When a short distance (within 30 meters) 10G connection is required and fiber optic cables are not desired, it is the lowest cost and most convenient solution. Before deployment, it is necessary to test compatibility, pay attention to heat dissipation, and select the corresponding network cable.
| Item | Parameter |
| Essence | SFP+packaged 10G electrical port module, converting SFP+optical port to RJ45 network port |
| Core advantage | Reuse existing copper cable wiring, plug and play, short distance low-cost interconnection |
| Maximum distance at 10G speed | 30 meters (must use Cat6a or higher Ethernet cable) |
| Downgrading distance at 1G speed | 100 meters (using Cat5e Ethernet cable) |
