SFP28 Passive Copper DAC Cable CBO SFP28-DAC-1M 1 m

BlueOptics SFP28 Passive Copper DAC Cable CBO SFP28-DAC-1M 1 m is a 1‑meter passive direct attach copper (DAC) assembly designed for short‑reach 25 Gigabit Ethernet (25GbE) links. The cable provides a physical electrical connection between compatible SFP28 ports on switches, servers and storage devices without requiring optical transceivers. It is intended for data center top‑of‑rack, server‑to‑switch and similar short‑distance interconnect applications where low latency and low power consumption are required.

Advantages

This passive SFP28 DAC cable delivers predictable latency and reduced power draw compared with optical transceivers, while simplifying port connectivity by offering a one‑piece electrical link. The fixed 1 m length minimizes signal attenuation for short runs and eliminates the need to provision and manage separate optical modules and fiber patch cords. The assembly is backward compatible with SFP28 ports designed for 25GbE and supports hot‑plug insertion, enabling simple deployment and replacement in rack environments.

Suitable for

• Top-of-rack connections between switches and servers
• Server-to-switch links within the same rack
• Short-reach links in storage and hyperconverged systems
• Environments where low latency and low power per port are priorities

Key specifications

• Interface: SFP28 to SFP28 electrical direct attach copper
• Data rate: 25 Gigabit Ethernet (25GbE) signaling
• Length: 1 meter
• Cable type: Passive twinax copper assembly
• Connector: SFP28 metal cage with latch for hot‑plug operation
• Typical use: Short‑reach rack and intra-rack connections

How to use

Power off equipment if required by your site procedures, then insert the SFP28 connector into the SFP28 port until the latch engages. Connect the other end to the corresponding SFP28 port on the remote device. Verify link status via the host device management interface or LED indicators. For hot‑swapping, follow platform guidance for safe insertion and removal to avoid network disruption. No additional configuration is required at the physical layer beyond ensuring compatible port settings (25GbE or negotiated speed).

Recommendations

Use this 1 m passive DAC cable for short, direct server-to-switch and switch-to-switch connections within racks. Avoid bending the cable sharply near the connectors, keep the assembly away from sources of strong electromagnetic interference, and follow your equipment vendor’s compatibility list to ensure full interoperability with specific switch and server models.