Lenovo 4X97B00142 2 m 400G QSFP112 DAC | Direct Attach, Enterprise

Maintain high-speed connectivity where distance is measured in rack units, not meters. Lenovo’s 2 m Passive 400G QSFP112 DAC is designed for short-reach 400G interconnects that favor low latency, lower power draw, and straightforward deployment. By using passive copper instead of optical modules, it removes the need for separate transceivers on both ends while keeping cabling simple in tightly packed infrastructure. This cable is a strong fit for adjacent-rack switching, top-of-rack to end-of-row links, and other short-span 400G paths where signal integrity and predictable behavior matter more than reach. The QSFP112 interface aligns with modern 400G ports, helping infrastructure teams standardize on a direct attach option for dense environments. For organizations building around performance per rack unit, passive DACs remain a disciplined choice: fewer components, less heat, and fewer points of failure than optical alternatives in the same distance class. Lenovo’s 2 m length gives enough slack for clean routing without inviting excess cable management overhead. When the design goal is to sustain 400G throughput across short distances with minimal complexity, this cable fits the brief.