Digitus 40G QSFP+ to 4XSFP+ Direct Attach Cable 2m

The Digitus 40G QSFP+ to 4xSFP+ Direct Attach Cable 2m (DN-81322) is a passive copper breakout cable that provides 40G connectivity via a single QSFP+ plug and splits into four SFP+ interfaces for 10G links. Designed for data centre and network equipment, the 2 m cable supports 40G Ethernet and allows interoperability from 40G to 4×10G for connecting switches, servers and storage systems.

Advantages

This QSFP+ to 4xSFP+ breakout cable supports up to 10.3125 Gbps per channel and is compliant with SFF-8436, SFF-8431, SFF-8432 and SFF-8472 standards. It operates from 0 °C to 70 °C, uses a single +3.3 V power supply and provides reliable short-reach connections with low latency and high signal integrity suitable for high-density environments.

Suitable for

• Interconnecting 40G QSFP+ ports to multiple 10G SFP+ ports
• Top-of-rack and leaf-spine switch deployments in data centres
• Connecting servers, storage (NAS) and high-performance computing nodes

Key specifications

• Manufacturer: DIGITUS, model DN-81322
• Connectors: QSFP+ to 4×SFP+
• Data rate: up to 10.3125 Gbps per channel
• Supported Ethernet: 40G Ethernet; 40G to 4×10G interoperability
• Cable length: 2 m
• Operating temperature: 0 °C to 70 °C
• Power: single +3.3 V supply
• Standards: SFF-8436, SFF-8431, SFF-8432, SFF-8472

How to use

Connect the QSFP+ plug to the 40G QSFP+ port on your switch or device and insert each SFP+ connector into the corresponding 10G SFP+ ports on target devices. Ensure equipment is powered off or follow hot-plug guidelines of your hardware when inserting or removing the cable. Verify link status on both ends after connection and configure network interfaces as required by your environment.

Recommendations

Use this breakout DAC for short-reach interconnects inside racks or between adjacent racks. Avoid tight bends and mechanical strain on the cable; maintain recommended bend radius and keep the cable away from sources of excessive heat. Confirm compatibility with your devices' QSFP+/SFP+ port firmware and vendor interoperability notes.