DAC Cable BlueOptics MCP7F00-A01AR-BL 2m QSFP28 to 4x SFP28 Black

The BlueOptics MCP7F00-A01AR-BL is a 2 m Direct Attach Copper (DAC) twinax cable with a QSFP28 connector on one end and four SFP28 connectors on the other. Designed for short-reach high-speed interconnections, this passive 100G to 4×25G cable follows MSA-compatible form factors and is intended for rack-to-rack or intra-rack links in data centers and server rooms. The cable is black, weighs approximately 0.25 kg and is built for environments where reliable, low-latency electrical signal transmission is required.

Advantages

The DAC cable provides a compact single-assembly solution to split a 100G QSFP28 port into four 25G SFP28 links without additional active electronics, resulting in low power consumption and minimal latency. Passive construction reduces points of failure and simplifies deployment while maintaining MSA-compatible mechanical and electrical characteristics for broad platform compatibility. The short length and twinax copper design make it a cost-effective option for high-density racks and adjacent rack connections.

Suitable for

• Connecting a QSFP28 100G port to up to four SFP28 25G ports within the same rack or neighboring racks
• High-density switch-to-switch or switch-to-server links in data centers
• Short-reach interconnects for storage systems and network appliances that support passive DAC twinax

Key specifications

• Form factor: QSFP28 to 4×SFP28
• Length: 2 meters
• Transmission type: Passive twinax copper (Direct Attach Cable)
• Nominal aggregate data rate: 100 Gbps (4×25 Gbps)
• Colour: Black
• Typical power consumption: near 0 W at cable (passive design)
• Designed for short-reach electrical links within racks or between adjacent racks

How to use

Insert the QSFP28 connector into the 100G QSFP28 port on the source device and insert each SFP28 connector into the corresponding 25G SFP28 ports on the destination device(s). Ensure both devices support passive DAC twinax cables and that ports are powered off or follow hot-plug procedures recommended by the hardware manufacturers. Confirm link status on both ends after connection and verify that the network interfaces are configured for the intended 25G or 25G-lane aggregation mode.

Recommendations

Use this DAC cable for short-distance connections only and avoid routing it near high electromagnetic interference sources. Verify hardware compatibility with the target switch, server or NIC vendor, and perform a link test after installation. For best longevity, avoid sharp bends, excessive pulling force and exposure to extreme temperatures.