DAC Cable BlueOptics DAC-QSFP28-100G-3M-BL 100G 3m Male/Male

The BlueOptics DAC-QSFP28-100G-3M-BL is a 3-meter direct attach copper (DAC) cable with QSFP28 connectors on both ends, designed for 100G high-speed data links. It provides a fixed, low-latency, and power-efficient connection option for short-reach interconnects in racks and between adjacent network equipment. The cable is intended for environments where reliable 100 Gigabit Ethernet connectivity and minimal signal loss are required.

Advantages

This DAC cable delivers consistent 100G throughput with low insertion loss and negligible latency compared to optical transceivers. The QSFP28-to-QSFP28 termination ensures plug-and-play compatibility with compatible 100G ports, reducing setup time. As a copper direct attach solution, it offers lower power consumption and total cost of ownership for short-range connections compared with active optical modules. Its fixed length simplifies cable management in dense rack deployments.

Suitable for

• Server-to-switch and switch-to-switch connections within the same rack or adjacent racks
• Top-of-rack (ToR) and spine-leaf architectures in data centers
• High-performance computing clusters requiring 100G links
• Test labs and network provisioning environments with short-reach requirements

Key specifications

• Connector type: QSFP28 male to QSFP28 male
• Nominal data rate: 100 Gbps
• Cable length: 3 meters
• Physical medium: direct attach copper (DAC)
• Typical use: short-reach interconnects within racks or between adjacent racks
• Latency: minimal, passive copper connection

How to use

Power down or follow hot-swap guidelines of your equipment and insert each QSFP28 connector into the corresponding 100G port until it latches. Ensure ports are compatible with passive DAC cables and verify link status through your switch or server management interface. For hot-pluggable systems, confirm vendor support for DAC modules before insertion to avoid port or system errors. Route the cable to avoid sharp bends and mechanical strain on connectors.

Usage recommendations

Use this DAC cable for short-distance, high-bandwidth interconnects where electrical connectivity is supported and heat dissipation is within equipment specifications. Avoid bending the cable beyond manufacturer-recommended bend radius and keep it clear of power supplies or heat sources. Verify compatibility with your network devices and firmware to ensure full 100G operation.