Direct Attach Cable BlueOptics 980-9I626-00C00A 100GBASE-CR4 Ethernet 30AWG 0.5 m

BlueOptics direct attach copper cable model 980-9I626-00C00A is a 0.5 m passive DAC designed for 100GBASE-CR4 Ethernet links. The cable uses 30 AWG conductors to deliver short-reach, low-latency connectivity between compatible 100 Gigabit ports on switches, network interface cards and servers. Its compact form factor and fixed length make it suitable for dense rack environments and point-to-point interconnects where a reliable, cost-effective copper connection is required.

Advantages

This 100GBASE-CR4 direct attach cable provides a deterministic copper connection with minimal configuration, eliminating the need for optical transceivers and fiber patching for short runs. The passive design reduces power consumption compared with active modules and supports high-throughput data transfer with low latency. The 0.5 m length helps maintain clean cable management in server racks and minimizes signal loss by keeping the link short.

Suitable for

• Short-reach 100 Gigabit connections between top-of-rack switches
• Direct links from servers to NICs supporting 100GBASE-CR4
• Rack-to-rack interconnects inside data centers and colocation facilities
• High-density switch panels requiring compact fixed-length cabling

Key specifications

• Interface standard: 100GBASE-CR4 (100 Gigabit Ethernet over copper)
• Cable type: Direct attach copper (DAC), passive
• Conductor gauge: 30 AWG
• Length: 0.5 m
• Typical use: Short-reach, rack-level interconnects
• Latency: Low, passive copper link
• Form factor: Twinax-style fixed assembly for QSFP28-compatible ports

How to use

Connect one end of the BlueOptics 100GBASE-CR4 direct attach cable to a compatible QSFP28 port on a switch, NIC or server and insert the other end into the corresponding port on the remote device. Ensure both ports support 100GBASE-CR4 over passive copper and that devices are powered down or port activity is managed according to vendor guidance when making live connections. Verify link status in the equipment management interface after installation and place the cable to avoid sharp bends or mechanical strain.

Usage recommendations

Use this 0.5 m passive DAC for short-distance, high-throughput interconnects within racks or between adjacent racks. Avoid using the cable beyond typical passive DAC reach recommendations for 30 AWG twinax to preserve signal integrity. For longer distances or different interoperability requirements, consult device compatibility lists and consider alternative copper or optical options.