SFP28 DAC kabel BlueOptics SFP28-DAC-1M-PS-BL 1 m samec/samec

The BlueOptics SFP28-DAC-1M-PS-BL is a 1 meter passive SFP28 direct attach cable (DAC) with SFP28 male connectors on both ends, designed for short-reach 25G data links. It implements 25GBase-CR electrical signalling over twinax copper with 30 AWG conductors and is MSA-compliant. The cable is intended for connecting servers, switches and storage within racks or between adjacent racks where 1 m length and direct-attach twinax copper is appropriate. The product is supplied in a black jacket and has a lightweight construction suited for dense rack environments.

Advantages

This SFP28 DAC cable provides a simple, low-latency electrical connection at 25 Gbit/s without active electronics in the cable, resulting in low power consumption and a compact form factor. MSA compliance ensures mechanical and electrical interoperability with equipment that supports SFP28 passive DACs. The passive twinax design reduces complexity and potential points of failure compared with active optical links for short distances. The 1 m length is optimized for short interconnects in rack and adjacent-rack setups.

Suitable for

• Connecting SFP28 ports on switches and servers within the same rack
• Adjacent-rack interconnects where 1 m cable length is sufficient
• 25GBase Ethernet, FCoE and other 25 Gbit/s electrical protocols supported by SFP28
• High-density rack deployments requiring low-power, low-latency links

Key specifications

• Nominal length: 1 meter
• Connector type: SFP28 male to SFP28 male
• Data rate: up to 25 Gbit/s per link
• Cable type: passive twinax copper (30 AWG)
• Compliance: MSA SFP28 electrical/mechanical compatibility
• Colour: black jacket
• Weight: approximately 0.08 kg

How to use

Insert each SFP28 connector firmly into the corresponding SFP28 port on the devices to be linked, observing the correct orientation and ensuring both host interfaces support passive DAC operation at 25G. Avoid sharp bends; maintain the cable bend radius recommended for twinax copper to preserve signal integrity. For reliable operation, confirm connected equipment is configured for the intended 25G protocol (Ethernet, FCoE, etc.) and check link status LEDs on the devices after insertion.

Recommendations

Use this 1 m passive SFP28 DAC for short-distance rack and adjacent-rack connections where low latency and low power are required. Verify device compatibility with passive twinax cables before deployment and route the cable to avoid excessive bending or mechanical strain. For environments requiring longer reach or optical isolation, consider fiber-based QSFP/SFP optics instead.