Direct Attach Cable BlueOptics 25GBASE-CR SFP28 to SFP28, passive, 2 m, AWG30

BlueOptics 25GBASE-CR passive Direct Attach Cable (DAC) SFP28 to SFP28, 2 m, AWG30 provides a fixed twinax copper link designed for short-reach 25 Gbps connections. The cable connects two SFP28 sockets directly without transceivers, offering a compact, low-latency physical layer solution for top-of-rack and intra-rack deployments. The 2 meter length is intended for server-to-switch or switch-to-switch links within racks or adjacent racks, delivering a simple and cost-effective alternative where optical modules are not required.

Advantages

This passive DAC eliminates the need for separate optical transceivers, reducing component count and power consumption while maintaining 25GBASE-CR compliance for 25 Gbps signaling. The AWG30 conductor gauge and direct-attach design provide low electrical latency and reliable signal integrity for short-distance links. Installation is straightforward: plug SFP28 connectors into hosting ports and secure the latches, yielding instant physical connectivity without additional configuration.

Suitable for

• Top-of-rack (ToR) server-to-switch connections
• Intra-rack switch-to-switch uplinks
• Short-reach 25 Gbps links in data centers and network closets
• Environments where power-efficient, low-latency copper links are preferred

Key specifications

• Interface: SFP28 to SFP28 direct attach
• Protocol compatibility: 25GBASE-CR
• Length: 2 meters
• Conductor gauge: AWG30
• Cable type: passive twinax copper
• Data rate: up to 25 Gbps

How to use

Confirm that both host ports support SFP28 modules and 25GBASE-CR links, then insert each SFP28 connector into the corresponding port until the latch engages. Use the integrated release tab to remove the cable when needed. No additional transceivers, configuration changes, or power connections are required. Link negotiation and speed settings are managed by the connected devices; verify link status LEDs or management interfaces to confirm operational state.

Usage recommendations

For reliable operation, use this 2 m passive DAC within rack or adjacent-rack distances and avoid sharp bends or kinks in the cable. Ensure adequate airflow around ports to maintain host device cooling. If longer distances or optical isolation are required, choose appropriate fiber or active cabling alternatives.