200G QSFP56 to 4×SFP56 Direct Attach Copper Cable (DAC)

• 200Gbps aggregate data rate using PAM4 signaling
• QSFP56 to 4×SFP56 breakout configuration
• Designed for short-distance, high-bandwidth data center interconnects
• Compatible with IEEE 802.3cd, IEEE 802.3bj, and IEEE 802.3by
• Supports InfiniBand HDR applications
• Optimized construction for low insertion loss and reduced crosstalk
• Backward compatible with QSFP+ connectors and cages where applicable
• Pull-to-release slide latch for convenient installation and removal
• Available with 26AWG, 28AWG, and 30AWG cable options
• Straight and breakout cable assemblies available
• Customized braid termination helps limit EMI radiation
• Customizable EEPROM mapping for cable identification and system compatibility
• Single 3.3V power supply
• Operating temperature range of 0°C to +70°C
• RoHS compliant

• 200G Ethernet switch-to-server connections
• 200G to 4×50G switch breakout links
• Data center top-of-rack and end-of-row connectivity
• High-performance computing (HPC) networks
• InfiniBand HDR interconnects
• AI and GPU cluster networking
• Server and network adapter connectivity
• Short-distance rack-to-rack and within-rack connections

The cable can be customized to meet specific system, deployment, and procurement requirements. OEM and ODM services are available for cable length, conductor gauge, labeling, connector configuration, EEPROM mapping, cable identification, and other assembly requirements.

For large-volume deployments, the cable assembly can also be adapted to customer-defined mechanical and electrical specifications. Customized braid termination and cable construction options can be provided where enhanced EMI control or specific installation requirements are needed.

What is the difference between this cable and a standard 200G QSFP56 DAC?

This model uses a QSFP56 connector on one end and four SFP56 connectors on the other, allowing a single 200G port to connect to four 50G ports. It is therefore intended specifically for breakout architectures rather than a simple 200G-to-200G connection.

What cable length should be selected for a 200G breakout DAC?

The appropriate length depends primarily on the physical distance between the switch, server, NIC, or other network devices. For in-rack connections, shorter assemblies are generally preferred to improve cable management and airflow. Custom lengths can be supplied for specific rack layouts.

Can the four SFP56 ends be connected to different devices?

Yes. The four SFP56 ends represent individual 50G lanes and can be used to establish separate 50G connections, provided that the host equipment and network configuration support the required breakout architecture.

How does the EEPROM help with equipment compatibility?

The EEPROM stores cable identification and configuration information that can be read by the host system. Custom EEPROM mapping can be provided to match specific equipment requirements, helping the cable be correctly recognized and managed by the network device.

When should a DAC be selected instead of an AOC or optical transceiver?

DAC is generally most suitable for short-distance connections where low cost, low power consumption, and simple installation are priorities. For longer links, tighter cable-routing requirements, or applications requiring greater electromagnetic isolation, AOC or optical transceiver solutions may be more appropriate.

Why are different AWG options available?

AWG determines the conductor diameter and influences cable thickness, flexibility, weight, and electrical characteristics. Smaller AWG numbers generally indicate thicker conductors, while higher AWG numbers allow a slimmer and more flexible cable assembly. The appropriate gauge can be selected according to the required length and installation environment.