Cable Direct Attach Digitus 40G QSFP+ a 4x SFP+ 3m

The Digitus 40G QSFP+ to 4x SFP+ Direct Attach Cable (3 m) provides a passive copper connection for high-speed links between QSFP+ ports and four SFP+ ports. Designed for data center and networking equipment, the cable supports 40G Ethernet and interoperability between a 40G QSFP+ interface and 4×10G SFP+ channels with a 3‑metre reach and operation in standard equipment environments.

Advantages

This direct attach cable supports per-channel data rates up to 10.3125 Gbps and provides reliable 40G to 4×10G breakout functionality in a single assembly. It operates on a single +3.3 V power supply, conforms to SFF-8436, SFF-8431, SFF-8432 and SFF-8472 specifications, and is specified for operation at temperatures from 0 °C to 70 °C. The 3 m cable length balances reach with low latency and signal integrity for short-reach data center interconnects.

Suitable for

• High-density top-of-rack and spine switch connections
• Interconnecting QSFP+ ports to multiple SFP+ ports in servers or storage systems
• Short-reach data center and network appliance links (up to 3 m)

Key specifications

• Data rate per channel: up to 10.3125 Gbps
• Aggregate support: 40G Ethernet with 4×10G breakout
• Cable type: QSFP+ to 4×SFP+ direct attach (passive copper)
• Maximum transmission length: 3 m (specified up to 5 m in general statement)
• Operating temperature range: 0 °C to 70 °C
• Power supply: single +3.3 V
• Standards compliance: SFF-8436, SFF-8431, SFF-8432, SFF-8472

How to use

Insert the QSFP+ connector into the 40G QSFP+ port and the four SFP+ connectors into the corresponding SFP+ ports on target devices. Ensure ports support breakout mode or the target system supports 4×10G from a single QSFP+ interface. Verify that connected equipment is powered off or follows hot‑plug guidelines of the vendor when inserting or removing the cable to avoid port or system issues.

Recommendations

Use the cable for short‑reach interconnects within racks or between adjacent racks. Confirm chassis and switch compatibility for QSFP+ to 4×SFP+ breakout operation and avoid exceeding the recommended operating temperature range.