DAC cable CBO SFP28-DAC-1M 1m passive copper for SFP28 ports

CBO SFP28-DAC-1M is a 1-meter passive copper direct-attach cable designed for direct connection between SFP28 ports. The cable provides a fixed-length, low-latency physical link for 25GbE and compatible SFP28 interfaces without requiring separate optical transceivers. Intended for short-reach rack-to-rack or within-rack connections, the cable simplifies cabling, reduces power consumption and equipment cost, and supports reliable high-speed data transmission in data center and enterprise switching environments.

Advantages

The passive copper construction delivers predictable latency and low heat generation compared with active modules, while the 1 m fixed length minimizes signal degradation for short-distance links. As a direct-attach solution, this cable eliminates the need for additional SFP28 transceivers, lowering both capital and operational expenses. Its plug-and-play form factor offers straightforward installation and immediate compatibility with compliant SFP28 ports, enabling stable 25GbE links for server, switch and storage interconnects.

Suitable for

• Short-reach connections between switches within the same rack
• Interconnects between adjacent racks in a data center row
• Server-to-switch or top-of-rack switch connections
• High-density environments where reduced power per port is required

Key specifications

• Interface type: SFP28 to SFP28 compatible
• Cable type: passive twinax copper
• Length: 1 meter
• Data rate support: up to 25 Gbit/s per lane (25GbE)
• Form factor: direct-attach cable (fixed-length, pluggable)
• Typical use case: short-reach rack-to-rack or within-rack links

How to use

Insert each SFP28 connector into the corresponding SFP28 port on the two devices to be connected until the latch engages. Confirm link status through device LEDs or management interfaces and verify negotiated speed is 25GbE or the expected compatible rate. For best performance, route the cable to avoid sharp bends and keep it clear of sources of electromagnetic interference. When removing the cable, press the connector latch and pull straight out to avoid stressing the port.

Recommendations

Use this 1 m passive DAC for short-distance, high-density connections where cost and power efficiency are priorities. Validate port compatibility with SFP28 before deployment and avoid extending beyond the recommended reach; for longer distances consider optical transceivers and fiber cables.