Types of Twinax Connector


Although optical transceiver and fiber patch cable keep their leading position in connecting switches and servers of a data center, DAC Twinax cable still takes a place in intra-rack connection because of its unique advantages of convenience and low price. What is Twinax connector? It is a “transceiver-shaped” plug equipped at each end of the DAC Twinax cable. This article will mainly introduce DAC Twinax cable, the types of Twinax connector and try to help you choose DAC Twinax cable.

Brief Introduction of DAC Twinax Cable

100G-QSFP28-to-QSFP28-DACWhat is DAC Twinax cable? It’s a kind of direct attach cable (DAC) used to connect switches to servers or routers. DAC Twinax cable consists of a fixed length of copper cable and Twinax connectors on each end. Twinax cable is widely used in local area network, data center, and high-performance computing connectivity and etc. It’s a cost-effective, low power consumption and low latency solution which is ideal for the high-density network. Besides, DAC Twinax cable is flexible for the connection within racks. Two kinds of DAC Twinax cable, passive DAC and active DAC differ in their components. Active Twinax cable contains electrical components while passive Twinax cable doesn’t have electrical parts. Not only that, with different connectors, DAC Twinax cable can support different data rate.

Twinax Connector Types of DAC Cable

Why do we need different types of Twinax connector? Because DAC Twinax cables with different connectors can support different data rate applications. Various types of Twinax connector of DAC have covered the main data transmission needs in data centers. For example, Twinax SFP+ is designed to work with equipment that has a 10G SFP+ interface. There are DAC Twinax cables with the same connectors at each end such as 10G Twinax SFP+ to SFP+, and DAC breakout cables for 10G to 40G or 25G to 100G connection designed to meet the requirement of migration.

Twinax Connector Types
Cable Length
10G SFP+ to SFP+
10G SFP+ Passive Direct Attach Copper Twinax Cable
25G SFP28 to SFP28
25G SFP28 Passive Direct Attach Copper Twinax Cable
40G QSFP+ to QSFP+
40G QSFP+ Passive Direct Attach Copper Cable
40G QSFP+ to 4xSFP+
40G QSFP+ to 4x10G SFP+ Passive Direct Attach Copper Breakout Cable
56G QSFP+ to QSFP+
56G QSFP+ Passive Direct Attach Copper Cable
100G QSFP28 to QSFP28 DAC
100G QSFP28 Passive Direct Attach Copper Twinax Cable
100G QSFP28 to 4xSFP28 DAC
100G QSFP28 to 4x25G SFP28 Passive Direct Attach Copper Breakout Cable

Make an Informed Choice

Customized DAC and AOC

When you choose DAC Twinax cable, max data rate and cable length are important factors to consider. As you can see in the previous part, there are many types of Twinax cables designed to meet the interconnection requirements of different speed networks. So, It’s important to choose the right Twinax cable according to your network requirements.

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