Lenovo 44T1364 0.5M MELLANOX QSFP Passive DAC Cable-sys

Lenovo 44T1364 0.5M QSFP Passive Direct-Attach Copper Cable

Overview

The Lenovo 44T1364 is a 0.5-meter passive direct-attach copper (DAC) cable with QSFP connectors on both ends, designed for short-reach, high-density interconnects inside a rack or between adjacent racks. At half a meter, it covers top-of-rack switch-to-server links where twinax copper outperforms optical in both cost and power draw — no transceivers to manage, no SFP inventory to maintain. The 44T1364 is specified for Mellanox-based switching and adapter infrastructure, making it the natural choice when you're cabling Lenovo servers or storage nodes back to a Mellanox (now NVIDIA) switch fabric.

Compatibility

Qualified for use with Mellanox QSFP-port switches and Lenovo server platforms equipped with QSFP-capable adapters. Typical deployment targets include Lenovo ThinkSystem servers paired with Mellanox SN-series or ConnectX adapter cards. The QSFP interface supports 40GbE and 56GbE signaling in standard passive DAC configurations — confirm your switch and HCA firmware supports passive DAC at the target line rate before ordering. Not suitable for runs beyond 0.5m; passive DAC copper has strict length limits tied to signal integrity, so step up to an active cable or optical transceiver for distances beyond 1–3m depending on your switch's passive DAC support matrix.

Installation Notes

Passive DAC cables require no power negotiation and insert directly into QSFP cages — no configuration required. Verify cage compatibility: QSFP+ (40G) and QSFP28 (100G) are physically similar but electrically distinct; the 44T1364 is rated for the Mellanox QSFP ecosystem, so confirm port type on both ends before seating. Country of origin is Mexico. Cable weight is 5.00 lb — factor this into cable management planning for dense top-of-rack deployments where cumulative cable weight loads strain relief brackets.