400G QSFP112 Passive DAC Twinax Copper Cable (0.5-3m): 400G-PDAC-QSFP112

The EDGEOPTIC 400G-PDAC-QSFP112 is a passive direct attach copper cable designed to work across multiple vendors, making it a flexible choice for modern 400 Gigabit Ethernet and InfiniBand NDR environments. It uses QSFP112 connectors on both ends in a simple point-to-point setup, which makes it ideal for short-distance, high-bandwidth connections inside data centers—such as linking spine and leaf switches, connecting AI/ML clusters, or supporting large-scale cloud infrastructure.

One of its key strengths is its ability to operate across a wide range of data rates, from 106.25 up to 425 Gbps. This means it can easily adapt to different network requirements. For Ethernet use, it supports 100G, 200G, and 400G speeds, helping data centers transition smoothly to higher-performance networks. In InfiniBand setups, it supports NDR, delivering the bandwidth needed for demanding tasks like high-performance computing, AI training, and GPU-intensive workloads where fast and reliable data transfer is essential.

Because it’s a passive DAC cable, it doesn’t require any external power and adds virtually no latency. This makes it a practical and efficient option for environments where speed and responsiveness matter. The cable is built with durable twinax copper using an optimized AWG28 design, which helps maintain strong signal quality while still being flexible enough for dense installations.

It also follows QSFP112 MSA and SFF-8665 standards, ensuring compatibility with a wide range of networking equipment. Built-in DDM/DOM functionality allows users to monitor key parameters like temperature and voltage in real time, which helps with maintenance and system reliability.

The cable meets important industry standards, including IEEE 802.3ck and IEEE 802.3bs, and operates within a typical data center temperature range of 0 to 70°C. With an MTBF of 1,000,000 hours, it’s designed for long-term, dependable use.

In practice, this cable is commonly used for connecting switches in spine-leaf architectures, linking GPU clusters for AI workloads, and supporting high-speed storage networks. Its passive design also helps reduce power consumption, which can contribute to more energy-efficient data center operations.

To ensure quality, each cable is thoroughly tested before delivery, including checks for electrical performance, connector integrity, and EEPROM data accuracy. It is also CE and RoHS certified, meeting global safety and environmental standards.