SFP28 DAC kabel BlueOptics SFP28-DAC-3M-PS-BL 3 m samec/samec

The BlueOptics SFP28-DAC-3M-PS-BL is a 3 meter passive SFP28 direct attach cable (DAC) with SFP28 male connectors on both ends. Designed for short-reach connections in data centers and rack environments, this twinax copper cable supports 25GBase-CR electrical signaling for 25 Gbit/s links between switches, routers, storage systems and other SFP28-capable hardware. The cable is MSA-compliant and built with 30 AWG twinax conductors to provide low latency and low power consumption for high-density network installations.

Advantages

This passive SFP28 DAC offers a straightforward, low-power connection method for short-distance 25G links, minimizing interface complexity and reducing the need for external transceivers. Its direct-attach design yields low latency and predictable electrical performance. Built to MSA specifications with high-quality components and tested compatibility, the cable is suitable for interoperable use across multiple hardware platforms that support SFP28 passive DACs. The 3 m length is suitable for connections within and between adjacent racks while keeping signal integrity and limiting power draw.

Suitable for

• 25G connectivity between switches and top-of-rack devices
• Direct links to storage arrays and servers with SFP28 ports
• Short-reach links inside and between adjacent racks in data centers
• High-density patching in switch aggregation and spine-leaf architectures

Key specifications

• Connector type: SFP28 male to SFP28 male
• Length: 3.0 m
• Data rate: up to 25 Gbit/s (25GBase-CR)
• Cable type: passive twinax copper, 30 AWG
• Power consumption: passive (near 0 W for the cable itself)
• Compliance: MSA SFP28 electrical and mechanical specifications
• Colour: black
• Weight: approximately 0.08 kg

How to use

Install the cable by inserting each SFP28 connector into the corresponding SFP28 port until the latch engages. Ensure both devices support passive DACs and the 25GBase-CR protocol. Avoid sharp bends and maintain the specified minimum bend radius for twinax cable to preserve signal integrity. If the host platform requires vendor validation or specific firmware settings for third-party DACs, follow the device manufacturer's guidance to enable the link. After connection, verify the link status and negotiated speed on both endpoints.

Recommendations

For reliable operation, use this cable for short-distance links (within and between adjacent racks) where passive twinax is supported. Keep the cable routing clear of high-interference power sources, avoid excessive bending or mechanical strain, and confirm hardware compatibility if the platform enforces vendor checks.