100G QSFP28 Passive DAC Twinax Copper Cable (0.5-5m): 100G-PDAC-QSFP

Our EDGEOPTIC 100G-PDAC-QSFP is a multi-vendor compatible 100G QSFP28 passive direct attach copper cable designed for ultra-high-performance 100 Gigabit Ethernet, Fiber Channel, and InfiniBand applications within modern data center environments. The 100G-PDAC-QSFP cable features point-to-point configuration with QSFP28 connectors on both ends, delivering reliable high-bandwidth connectivity for short-reach interconnects between spine and leaf switches, high-performance servers, and storage systems.

The cable supports multi-rate operation from 44.8 to 112.2 Gbps, accommodating the demanding bandwidth requirements of contemporary data center architectures. For Ethernet deployments, the cable handles 100G Ethernet at 103.125 Gbps, supporting the latest generation of network infrastructure. Fiber Channel support includes 4×32G FC at 112.2 Gbps aggregate throughput, making the cable ideal for high-performance storage area network connectivity in enterprise and hyperscale environments. Additionally, the cable supports InfiniBand EDR at 100 Gbps for high-performance computing clusters and machine learning infrastructure.

As a passive DAC solution, the 100G-PDAC-QSFP requires no external power and introduces zero latency to signal transmission, making it the preferred choice for latency-sensitive applications such as financial trading platforms, real-time analytics, and distributed computing workloads. The cable construction utilizes high-quality twinax copper with optimized wire gauges for each length range: AWG30 for 0.5 to 1.5 meters, AWG28 for 2 to 3 meters, and AWG26 for 4 to 5 meters. This progressive wire gauge selection ensures optimal signal integrity at 25 Gbps per lane while maintaining practical cable flexibility for installation in high-density environments.

The electrical interface conforms to QSFP28 MSA, SFF-8436, and SFF-8665 specifications, ensuring broad compatibility with standard QSFP28 host systems from multiple equipment vendors. Our 100G QSFP28 DAC cables can be encoded for compatibility with over 80 different equipment brands including major networking, server, and storage vendors. The cable incorporates DDM/DOM (Digital Diagnostic Monitoring) functionality, providing real-time diagnostic data including module temperature and supply voltage through the MSA-compatible interface for proactive network monitoring.

Standards compliance includes IEEE 802.3ba alongside QDR InfiniBand specifications. The cable operates within a 0 to 70°C temperature range, suitable for controlled data center environments. With an MTBF rating of 1,000,000 hours, the cable delivers long-term reliability for mission-critical 100G infrastructure deployments.

Typical deployment scenarios include spine-leaf switch interconnects, server-to-ToR connectivity in hyperscale environments, high-performance storage links, and HPC cluster backbones. The passive design eliminates power consumption and reduces overall system power budget compared to active alternatives.

Our 100G QSFP28 passive DAC is CE/RoHS certified and compliant with product safety standards. Because our focus is providing top quality service, we perform comprehensive quality checks before delivery including electrical parameter measurements, connector inspection tests, and QSFP28 EEPROM memory data validation tests.