DAC passive 25G SFP28 direct attach cable Zyxel DAC25G-3M-ZZ0101F 3 m

Passive 25G SFP28 direct attach copper cable by Zyxel, 3 m long, provides a straightforward way to connect SFP28 ports in switches, routers and servers for short-range, high-speed links. The cable is intended for rack-level and data center interconnects where low latency and reliable 25 Gigabit throughput are required. As a direct attach cable, it eliminates the need for separate optical transceivers and plugs directly into compatible SFP28 cages for immediate operation.

Advantages

This passive SFP28 direct attach cable offers a cost-effective method to establish a 25 Gigabit link with minimal power consumption and latency. Its 3 m length is optimized for top-of-rack and adjacent-rack connections, reducing cable clutter while maintaining signal integrity. The integrated SFP28 connectors simplify installation and remove the additional complexity of module handling, making it a practical choice for dense deployments in data center environments.

Suitable for

• Short-range connections between SFP28 ports in switches and routers
• Server-to-switch links within the same rack or neighboring racks
• Top-of-rack and leaf-spine data center interconnects

Key specifications

• Interface: SFP28 to SFP28 direct attach copper
• Data rate: 25 Gigabit per second
• Link type: Passive copper DAC (no external power required)
• Cable length: 3 meters
• Use case: Short-reach, rack-level connectivity

How to use

Power down is not required in most hot-pluggable systems; insert each SFP28 connector into the corresponding SFP28 cage on your switch, router or server until it clicks into place. Ensure both ends are fully seated and verify link status via the device management interface or status LEDs. For best results, use the cable for direct connections between adjacent or nearby racks and avoid sharp bends or excessive tension on the cable during installation.

Recommendations

Verify compatibility with your network equipment vendor’s SFP28 DAC support matrix before installation. Route the cable to minimize electromagnetic interference and maintain bend radius guidelines; avoid running alongside high-power AC lines. For environments requiring longer reach or fiber isolation, consider optical transceivers and fiber cabling instead of a passive DAC.