Introduction to 10G SFP Cable (SFP+ Direct Attach Cable DAC)

10G SFP Cable Wiki

What is 10G SFP cable? Also known as SFP+ twinax cable, 10G SFP cable is an SFP+ cable assembly used in rack connections between servers and switches. It consists of a high speed copper cable and two copper SFP+ modules. The SFP+ module allows hardware manufacturers to achieve high port density, configurability and utilization at a very low cost and reduced power budget.

Direct attach cable assemblies are a high speed, cost-effective alternative to fiber optic cables in 10Gb Ethernet, 8Gb Fibre Channel and InfiniBand applications. They are suitable for short distances, making them ideal for highly cost-effective networking connectivity within a rack and between adjacent racks. They enable hardware OEMs and data center operators to achieve high port density and configurability at a low cost and reduced power requirement.

FS.COM SFP+ copper cable assemblies meet the industry MSA for signal integrity performance. The cables are hot-removable and hot-insertable: you can remove and replace them without powering off the switch or disrupting switch functions. A cable comprises a low-voltage cable assembly that connects directly into two SFP+ ports, one at each end of the cable. The cables use high-performance integrated duplex serial data links for bidirectional communication and are designed for data rates of up to 10 Gbps. Similar to the fiber patch cables, the SFP+ direct attach cable is made up of a cable and two connectors, with the difference that connectors are the SFP+ transceivers instead.

10G SFP Cable Types

SFP+ cable assemblies generally have two types which are passive and active versions.

10G SFP CableSFP+ Cable

10G SFP+ Passive Copper Cable

SFP+ passive copper cable assemblies offer high-speed connectivity between active equipment with SFP+ ports. The passive assemblies are compatible with hubs, switches, routers, servers, and network interface cards (NICs) from leading electronics manufacturers like Cisco, Juniper, etc..

10G SFP+ Active Copper Cable

SFP+ active copper cable assemblies contain low power circuitry in the connector to boost the signal and are driven from the port without additional power requirements. The active version provides a low-cost alternative to optical transceivers, and are generally used for end of row or middle of row data center architectures for interconnecting distances of up to 15 meters.

Applications of 10G SFP Cable

  • Networking – servers, routers and hubs
  • Enterprise storage
  • Telecommunication equipment
  • Network Interface Cards (NICs)
  • 10Gb Ethernet and Gigabit Ethernet (IEEE802.3ae)
  • Fibre Channel over Ethernet: 1, 2, 4 and 8G
  • InfiniBand standard SDR (2.5Gbps), DDR (5Gbps) and QDR (10Gbps)
  • Serial data transmission
  • High capacity I/O in Storage Area Networks, Network Attached Storage, and Storage Servers
  • Switched fabric I/O such as ultra high bandwidth switches and routers
  • Data center cabling infrastructure
  • High density connections between networking equipment

FS.COM 10G SFP Cable Solutions

Our SFP+ twinax copper cables are avaliable with custom version and brand compatible version. All of them are 100% compatible with major brands like Cisco, HP, Juniper, Enterasys, Extreme, H3c and so on. If you want to order high quality compatible SFP+ cables and get worldwide delivery, we are your best choice.

For instance, our compatible Cisco SFP+ twinax copper cables are suitable for very short distances and offer a cost-effective way to connect within racks and across adjacent racks. We can provide both passive Twinax cables in lengths of 1, 3 and 5 meters, and active Twinax cables in lengths of 7 and 10 meters. (Tips: The lengths can be customized up to the customers’ requirements.)

Features of FS.COM 10G SFP Cable

  • 1m/3m/5m/7m/10m/12m available
  • RoHS Compatible
  • Enhanced EMI suppression
  • Low power consumption
  • Compatible to SFP+ MSA
  • Hot-pluggable SFP 20PIN footprint
  • Parallel pair cable
  • 24AWG through 30AWG cable available
  • Data rates backward compatible to 1Gbps
  • Support serial multi-gigabit data rates up to 10Gbps
  • Support for 1x, 2x, 4x and 8x Fibre Channel data rates
  • Low cost alternative to fiber optic cable assemblies
  • Pull-to-release retractable pin latch
  • I/O Connector designed for high speed differential signal applications
  • Temperature Range: 0~ 70°C
  • Passive and Active assemblies available (Active Version: Low Power Consumption: < 0.5W Power Supply: +3.3V)


What are the performance requirements for the cable assembly?

Our 10G SFP copper passive and active cable assemblies meet the signal integrity requirements defined by the industry MSA SFF-8431. We can custom engineer cable assemblies to meet the requirements of a customer’s specific system architecture.

Are passive or active cable assemblies required?

Passive cables have no signal amplification in the assembly and rely on host system Electronic Dispersion Compensation (EDC) for signal amplification/equalization. Active cable assemblies have signal amplification and equalization built into the assembly. Active cable assemblies are typically used in host systems that do not employ EDC. This solution can be a cost savings to the customer.

What wire gauge is required?

We offer 10G SFP cable assemblies in wire gauges to support customers’ specific cable routing requirements. Smaller wire gauges results in reduced weight, improved airflow and a more flexible cable for ease of routing.

What cable lengths are required?

Cable length and wire gauge are related to the performance characteristics of the cable assembly. Longer cable lengths require heavier wire gauge, while shorter cable lengths can utilize a smaller gauge cable.

Are there any special customer requirements?

Examples of special customer requirements include: custom cable lengths, EEPROM programming, labeling and packaging, pull tab length and color, company logo, signal output de-emphasis, and signal output amplitude. We can custom engineer cables to specific customer system architecture.

Related Article:
SFP+ DAC Twinax Cable Deployment Considerations
Use High Speed Direct Attach Cable for Data Center Interconnection
DAC Cable Wiki: Things You Should Know Before Buying DAC Cable

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