Passive SFP28 Twinax Copper Cable CBO SFP28-DAC-2M 2 m for 25GbE Direct Attach

Passive SFP28 Twinax Copper Cable CBO SFP28-DAC-2M is a 2-meter direct-attach cable designed for 25GbE connections between SFP28 ports. This copper twinax assembly connects servers, switches and storage devices without separate transceivers, providing a compact and cost-efficient solution for short-reach links in data centers and rack-to-rack environments. The cable supports low-latency, high-throughput transmission suitable for modern 25 Gigabit Ethernet networks where short distance connectivity and predictable performance are required.

Advantages

The passive twinax copper design eliminates the need for optical transceivers, reducing component and power costs while simplifying installation. Its fixed 2 m length offers predictable channel characteristics and minimal signal degradation across typical rack and row distances. The SFP28 form factor ensures compatibility with standard 25GbE SFP28 ports and provides low latency and consistent electrical performance suited to high-density networking environments.

Suitable for

• Server-to-switch 25GbE connections within racks
• Switch-to-switch short-reach links in the same rack or adjacent racks
• Top-of-rack to leaf aggregation links in data center networks
• High-density ports where low cost and low power per link are important

Key specifications

• Interface: SFP28 to SFP28 copper direct attach
• Nominal data rate: 25 Gigabit Ethernet
• Cable type: Passive twinax copper
• Length: 2 meters
• Form factor: SFP28 compatible connector modules
• Use case: Short-reach, low-latency electrical connection

How to use

Insert each SFP28 connector end into the corresponding SFP28 port on the two devices to be connected. Ensure ports are powered down or follow hot-plug guidelines of your hardware if required by the vendor. After insertion, verify link status on both devices and configure interfaces according to network settings (speed/duplex/autonegotiation) if necessary. No transceiver modules or fibre patch cords are required; the cable provides a direct electrical channel between devices.

Recommendations

Use this passive 2 m twinax cable for short, direct 25GbE connections inside racks or between adjacent racks. Verify SFP28 port compatibility and platform support for passive DACs with your switch or server vendor documentation before deployment. Avoid excessive bending or mechanical stress on the cable and maintain proper airflow in dense racks to preserve signal integrity and connector reliability.