200G QSFP-DD to 2×100G QSFP28 Passive DAC Breakout Cable: 200G-PDAC-QSFP-DD-2QSFP28

Our EDGEOPTIC 200G-PDAC-QSFP-DD-2QSFP28 is a multi-vendor compatible 200G QSFP-DD to 2x 100G QSFP28 passive direct attach copper breakout cable designed for ultra-high-performance 200 Gigabit Ethernet aggregation applications within modern data center and telecommunications environments. The 200G-PDAC-QSFP-DD-2QSFP28 cable features a 1-to-2 breakout configuration with a single QSFP-DD connector on the host end and two independent 100G QSFP28 connectors on the multi-port end, delivering reliable high-bandwidth connectivity for short-reach 200G-to-100G interconnects between high-density spine switches, ToR aggregation layers, and 100G QSFP28-equipped servers, storage arrays, and routers.

The cable routes data signals from the eight-lane 200G QSFP-DD host port to two independent 100G QSFP28 endpoints, with the first four lanes connecting to one QSFP28 connector and the remaining four lanes connecting to the second QSFP28 connector. The cable operates at 25 to 28 Gbps NRZ per lane, providing 100 Gbps aggregate to each QSFP28 endpoint (4×25G NRZ) and 200 Gbps aggregate on the QSFP-DD host side. For Ethernet deployments, the cable enables a 200GbE QSFP-DD switch port to terminate into two existing 100GbE QSFP28 endpoints, allowing operators to leverage 200G-capable spine and aggregation switches while preserving deployed 100G server, storage, and routing infrastructure. The cable is also suitable for telecommunications applications including central office, cellular infrastructure, and multi-platform service systems.

As a passive DAC solution, the 200G-PDAC-QSFP-DD-2QSFP28 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 tightly coupled HPC workloads. The cable construction utilizes high-quality twinax copper with optimized wire gauges for each length range: AWG30 for 0.5 to 2.5 meters and AWG28 for 3 meters. This progressive wire gauge selection ensures optimal signal integrity at 28 Gbps NRZ per lane while maintaining practical cable flexibility for installation in high-density breakout deployments.

The electrical interface conforms to QSFP-DD MSA and SFF-8636 specifications, ensuring broad compatibility with standard QSFP-DD and QSFP28 host systems from multiple equipment vendors. Our 200G QSFP-DD to 2x100G QSFP28 DAC breakout cables can be encoded for compatibility with over 80 different equipment brands including major networking, server, and storage vendors. The cable incorporates an I2C two-wire interface for 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 802.3bj and IEEE 802.3cd specifications. The cable supports hot pluggability and is engineered with low crosstalk and optimized return loss characteristics for excellent signal integrity across all eight differential pairs. 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 200G breakout infrastructure deployments.

Typical deployment scenarios include 200G QSFP-DD spine-to-100G QSFP28 leaf interconnects, 200G ToR-to-server connectivity preserving existing 100G NICs, hybrid 200G/100G migration topologies, central office and cellular telecommunications aggregation, and 2:1 port density expansion in space-constrained switch deployments. The breakout architecture effectively doubles usable port count on 200G-capable QSFP-DD switches when connecting to 100G QSFP28 endpoints, reducing per-port cost and simplifying cable management compared to running separate 100G cables from dedicated QSFP28 ports.

Our 200G QSFP-DD to 2x100G 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 QSFP-DD/QSFP28 EEPROM memory data validation tests.