Network Cable BlueLAN QSFP28-4SFP28-DAC-2M QSFP28 to 4x25GBASE-CR SFP28 Direct Attach Breakout Cable 2m Blue

The BlueLAN QSFP28-4SFP28-DAC-2M is a passive 100GBASE-CR4 direct attach breakout cable engineered for high-speed short-reach connections. One end terminates in a QSFP28 plug while the other end splits into four SFP28 plugs, enabling direct connectivity between a 100G QSFP28 port and four 25G SFP28 ports without additional transceivers. With a 2 meter length and AWG26 conductor gauge, this cable provides low insertion loss and consistent signal integrity for data center top-of-rack, leaf-spine and server interconnects.

Advantages

This direct attach cable offers a cost-effective and energy-efficient solution for linking 100G and 25G equipment with minimal latency and no active electronics. The QSFP28-to-4xSFP28 breakout design simplifies port management by converting one high-density port into four independent 25G links. Its passive construction reduces power consumption compared with active optical transceivers and supports predictable performance in controlled short-reach environments. The 2 m length balances flexibility and neat cable routing within racks and cable trays.

Suitable for

• Data center blade servers and top-of-rack switches requiring 100G-to-4×25G breakout links
• Leaf-spine architectures connecting aggregation switches to access switches or servers
• High-performance computing clusters where low-latency 25G links are needed
• Short-reach backplane replacements or patching within the same equipment room

Key specifications

• Interface: QSFP28 (one end) to 4 × SFP28 (other end)
• Data rate: 100G aggregated (4 × 25G lanes)
• Standard: 100GBASE-CR4 / 25GBASE-CR
• Length: 2 meters
• Conductor gauge: AWG26
• Type: Passive copper direct attach breakout cable
• Connector gender: Plug-to-plug with breakout harness

How to use

Install the cable by inserting the QSFP28 plug into the 100G QSFP28 port and insert each SFP28 plug into the respective 25G SFP28 ports on the target device. Ensure devices are powered down or ports are disabled if required by the equipment vendor prior to insertion. Verify link status and speed in the switch or server management interface after physical connection. Route the cable to avoid sharp bends or excessive tension; maintain a bend radius appropriate for AWG26 copper cabling to preserve signal quality.

Usage recommendations

For reliable operation, use this passive breakout cable for short-distance links inside racks or between adjacent racks within the same room. Confirm compatibility with your switch or server vendor for direct-attach passive cables and ensure firmware or port configuration supports breakout mode where needed.