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

The BlueLAN QSFP28-4SFP28-DAC-2M is a passive direct attach breakout cable that converts a single QSFP28 interface into four 25G SFP28 channels. Designed for short-reach, high-bandwidth interconnects, this 2 meter cable supports 100GBASE-CR4 via four independent 25G lanes and uses AWG26 conductors to maintain signal integrity. Its passive construction provides low latency and minimal power overhead, suitable for top-of-rack switches, server uplinks and high-density patching within racks.

Advantages

This BlueOptics breakout cable delivers four native 25G channels from a single QSFP28 port without additional transceivers, reducing hardware complexity and cost. The passive design lowers power consumption and avoids active components that can introduce heat or failure points. A 2 m fixed length simplifies cable management in data center rows and cabinets while AWG26 wiring ensures reliable electrical performance for short-reach interconnects.

Suitable for

• High-density switch-to-switch connections in data centers
• Server uplinks from QSFP28 ports to multiple 25G SFP28 ports
• Top-of-rack and end-of-row deployments requiring 100G to 4×25G breakout
• Short-reach patching within racks and equipment cabinets

Key specifications

• Connector A: QSFP28 (breakout end)
• Connector B: 4 × SFP28
• Aggregate data rate: 100 Gbps (4 × 25 Gbps lanes)
• Standard supported: 100GBASE-CR4 / 25G per lane
• Length: 2 meters
• Cable construction: AWG26
• Design: Passive direct attach copper breakout
• Typical application: Short-reach copper interconnects in racks

How to use

Install the QSFP28 plug into the source device's QSFP28 port and insert each SFP28 plug into the corresponding 25G SFP28 ports on the destination devices. Ensure devices support direct attach breakout operation and that link speeds and lane mapping are configured according to switch or host vendor documentation. Handle connectors by the housing and avoid excessive bending near the termination points to preserve signal integrity.

Usage recommendations

Use this 2 m passive breakout cable for intra-rack and short inter-rack connections where 100G to 4×25G conversion is required. Confirm vendor compatibility for passive DAC cables on both the QSFP28 and SFP28 ports; limit installation to environments within the cable's recommended temperature and mechanical stress limits to maintain reliable operation.