Lenovo 1M Passive QSFP28 DAC

Experience ultra-fast, reliable intra-rack connectivity with the Lenovo 1M Passive QSFP28 Direct Attach Copper (DAC) cable. Engineered for high-density data centers, this 3.28-foot (1-meter) cable delivers 100 Gbps performance between QSFP28 ports on network devices, servers, and storage systems. Its passive copper design minimizes latency and power consumption, making it an economical, plug-and-play solution for short-reach interconnects that demand low latency, predictable signal integrity, and simplified deployment. Whether upgrading a top-of-rack switch fabric or linking high-performance servers in a dense data-center rack, this Lenovo QSFP28 DAC helps you achieve optimal throughput with dependable reliability.

• High-speed 100 Gbps performance: Supports 100G Ethernet over QSFP28 ports for fast, predictable data transfers. Ideal for bandwidth-intensive workloads such as virtualization, AI/ML workloads, real-time analytics, and high-frequency trading, delivering low-latency communication across your rack.
• 1-meter passive copper DAC design: A true passive Direct Attach Copper solution optimized for short-reach interconnects. No active electronics mean lower power, less heat, and reduced total cost of ownership while maintaining excellent signal integrity in controlled data-center environments.
• Plug-and-play simplicity: Ready to install with no external power or complex configuration. Just insert into QSFP28 ports on compatible devices and you’re operational, enabling rapid deployment and faster time-to-production for new network topologies.
• Durable construction and reliable connectivity: Premium copper conductors paired with robust QSFP28 connectors and secure latching deliver solid mechanical stability and durable performance through extensive plug-unplug cycles and rack life.
• Broad compatibility and space efficiency: Designed to work with Lenovo and other vendors’ devices featuring QSFP28 ports for 100G Ethernet, this cable supports dense port packing and simplifies fabric scalability in modern data centers.

Technical Details of Lenovo 1M Passive QSFP28 DAC

• Length: 1 meter (3.28 feet)
• Cable type: Passive Direct Attach Copper (DAC)
• Connectors: QSFP28 to QSFP28
• Data rate: 100 Gbps (100GBASE-CR4 compatible)
• Transmission: Copper, passive design for low latency and minimal power consumption
• Conductor gauge: Premium copper conductors (commonly 28 AWG in similar 1 m DAC implementations)
• Temperature range: Typical data-center operating range suitable for controlled environments
• RoHS compliance: Yes — environmentally friendly and compliant with industry restrictions
• Certificates and standards: Compatible with QSFP28 ports supporting 100G Ethernet networks

how to install Lenovo 1M Passive QSFP28 DAC

• Power down the devices only if your data-center policy requires it, or verify hot-plug capability for QSFP28 ports on your equipment.
• Remove any protective caps from the QSFP28 ports on both devices and ensure the ports are clean and undamaged.
• Align the DAC so that the QSFP28 connectors fit squarely into the ports; push firmly until the latches engage securely on both ends.
• Route the cable carefully to avoid sharp bends or kinks. Keep the cable in a smooth path with a gentle bend radius to preserve signal integrity and prolong cable life.
• Power on the devices and verify link status. Check port LEDs to confirm a stable 100 Gbps link, and run a quick throughput test to validate performance.
• Label the cable for future maintenance and document the port pairings to simplify network management and troubleshooting.

Frequently asked questions

• Q: What is the length of the Lenovo 1M Passive QSFP28 DAC? A: The cable length is 1 meter (3.28 feet), designed for intra-rack connections where short reach and high density are required.
• Q: Is this cable passive or active? A: It is a passive Direct Attach Copper (DAC) cable with no active electronics, optimized for low latency and energy efficiency.
• Q: What speeds does this cable support? A: It supports up to 100 Gbps (100GBASE-CR4) across QSFP28 ports, suitable for high-speed data-center networks.
• Q: Is the Lenovo 1M Passive QSFP28 DAC compatible with non-Lenovo devices? A: Yes. The cable is designed for QSFP28 ports and is compatible with other vendors’ devices that support 100G QSFP28 interfaces, enabling cross-vendor interconnects in mixed environments.
• Q: Can I use this DAC in hot-plug configurations? A: In most data centers, QSFP28 DAC cables are hot-pluggable. Verify your switch or server specifications and follow your equipment’s hot-plug guidelines before installation.
• Q: What applications benefit most from this DAC? A: Dense rack deployments, high-capacity leaf-spine fabrics, top-of-rack switch interconnects, and short-reach links in server-to-storage or inter-switch connections where low latency and cost efficiency matter.