ALLNET 25G SFP28 Direct Attach Copper Cable, 3m (ALL4779-3)

High-density data center links often suffer from bulky optical transceivers and fragile fiber, driving up cost and complexity. The ALLNET ALL4779-3 solves this with a 3-meter passive Direct Attach Copper (DAC) cable that delivers a full 25 Gbit/s link between SFP28 ports using robust twinax copper.

Who is it for

Network engineers and data center operators who need reliable, low-latency 25 Gigabit Ethernet connections between switches, servers, and storage systems within a rack or adjacent racks. Ideal for high-performance computing and enterprise core deployments where short-reach copper is preferred over optical.

Main features

• Passive SFP28 to SFP28 direct attach copper cable
• Supports 25 Gigabit Ethernet (IEEE 802.3by)
• 3-meter length for flexible rack-level connectivity
• Hot-swappable and MSA compliant for broad compatibility
• Low power consumption (< 0.1 W) – no transceiver power needed
• Full-duplex operation at 25 Gbit/s

Specifications

• Cable type: Direct Attach Copper (DAC), passive twinax
• Connectors: SFP28 (both ends)
• Data rate: 25 Gbit/s
• Length: 3 m
• Impedance: 100 Ohm
• Operating temperature: 0°C to 70°C
• Storage temperature: -40°C to 85°C
• Compliance: MSA, IEEE 802.3by

Tips

Use this DAC for direct connections between SFP28 ports on switches and servers within the same rack or adjacent racks. For longer distances or higher port density, consider active optical cables (AOCs) or optical transceivers with fiber.