ALLNET 25G SFP28 Direct Attach Copper Cable, 1m, Passive Twinax, ALL4779-1

This ALLNET DAC module offers a direct-attach copper link for 25 Gigabit Ethernet, eliminating the need for separate transceivers and fiber. The 1-meter passive twinax cable connects two SFP28 ports, providing a low-latency, low-power interconnect for short-reach applications in data centers and high-performance computing clusters.

Highlights

• 25 Gbps data rate (25GBASE-CR) over passive twinax copper
• SFP28 to SFP28 connectors, hot-swappable
• 1 meter length, 30 AWG, 100 Ohm impedance
• Compliant with SFF-8402 and SFF-8431, supports IEEE 802.3by
• Power consumption under 0.1 W

In daily use

The cable plugs directly into SFP28 cages on switches, NICs, and servers. Its passive design draws no additional power and introduces minimal latency, making it ideal for top-of-rack connections and storage networks. The PVC jacket and 0°C to 70°C operating range ensure reliable performance in typical data center environments.

Full specifications

• Cable Type: Direct Attach Copper (DAC)
• Data Rate: 25 Gbps (25GBASE-CR)
• Connector A: SFP28
• Connector B: SFP28
• Cable Length: 1 meter
• Cable Material: Twinax Copper
• Wire Gauge: 30 AWG
• Active/Passive: Passive
• Impedance: 100 Ohm
• Jacket Material: PVC
• Operating Temperature: 0°C to 70°C
• Storage Temperature: -40°C to 85°C
• Power Consumption: < 0.1 W
• Protocol Support: IEEE 802.3by (25GBASE-CR)
• Compliance: SFF-8402, SFF-8431, RoHS
• Application: Data Center Interconnect, HPC, Enterprise Networking

Final note

A short-reach 25G link that keeps power and latency low while simplifying cabling.