BlueOptics SFP56 Direct Attach Cable 50GBASE-CR passive 0.5 m (compatible with NVIDIA 980-9I876-00G00A)

BlueOptics SFP56 Direct Attach Cable 50GBASE-CR passive 0.5 m is a short-reach copper interconnect designed for direct connection between compatible SFP56 ports and network adapters. The cable supports 50GBASE-CR data rates and offers a fixed length of 0.5 m for rack- and chassis-level connections. It provides low-latency, high-bandwidth connectivity suitable for switches, servers and network interface cards that accept SFP56 passive direct attach cables.

Advantages

This passive direct attach cable delivers a cost-effective physical link for 50 Gbit/s connections with minimal power consumption compared to active optical transceivers. The fixed 0.5 m length reduces signal attenuation and is ideal for short distance links inside racks or between adjacent devices. Plug-and-play compatibility simplifies installation and reduces configuration time when used with SFP56-compliant ports and compatible network adapters.

Suitable for

• Short-reach connections inside server racks and network cabinets
• Direct links between switches and top-of-rack servers
• High-density environments requiring low-latency 50 Gbit/s links
• Upgrading existing copper interconnects to 50GBASE-CR speeds

Key specifications

• Interface: SFP56 direct attach cable (DAC), passive
• Data rate: 50 Gbit/s (50GBASE-CR)
• Length: 0.5 m fixed
• Physical medium: Twinax copper assembly
• Typical use: Short-reach, rack-level interconnects
• Latency: Low, suitable for latency-sensitive applications

How to use

Install the cable by inserting each SFP56 connector into the corresponding port on the devices to be linked until the latch engages. Ensure both devices support passive SFP56 direct attach cables and are powered off or traffic is halted during hot-plug operations if required by the equipment vendor. After insertion, verify link status through device LEDs or management interfaces and confirm 50 Gbit/s link negotiation. No additional configuration is required for basic connectivity; driver or firmware compatibility on the network adapter should be confirmed if the device enforces vendor compatibility lists.

Usage recommendations

For reliable operation, use the cable for short, direct connections within the same rack or between adjacent racks only. Avoid sharp bends and excessive pulling force on the cable assembly. Verify compatibility with your switch or adapter firmware and consult equipment documentation for hot-plug guidelines and supported passive DAC modules.