200G QSFP-DD to 4×50G QSFP28 Active Optical Breakout Cable: 200G-AOC-QSFP-DD-4QSFP28

Our EDGEOPTIC 200G-AOC-QSFP-DD-4QSFP28 is a multi-vendor compatible 200G QSFP-DD to 4x 50G QSFP28 active optical breakout cable designed for ultra-high-performance 50/200 Gigabit Ethernet aggregation applications requiring extended reach beyond copper cable limitations. The 200G-AOC-QSFP-DD-4QSFP28 features a 1-to-4 breakout configuration with a single QSFP-DD connector on the host end and four independent 50G QSFP28 connectors on the multi-port end, utilizing embedded parallel multimode fiber optic technology to deliver reliable high-bandwidth connectivity up to 100 meters for 200G-to-50G interconnects between high-density spine switches, ToR aggregation, and 50G-equipped servers, NICs, and storage endpoints.

The cable routes data signals from the eight-lane 200G QSFP-DD host port to four independent 50GBASE-SR2 QSFP28 endpoints, with two lanes connecting to each QSFP28 connector. Each lane operates at 25.78125 Gbps NRZ, providing 50 Gbps aggregate to each QSFP28 endpoint and 200 Gbps aggregate on the QSFP-DD host side. For Ethernet deployments, the cable enables a 200G QSFP-DD switch port to terminate into four 50GBASE-SR2 QSFP28 endpoints, maximizing port utilization for high-density 50G server fan-out. The integrated CDR (Clock and Data Recovery) circuit on each lane regenerates clean signals across the optical link, supporting reliable transmission across all four breakout channels.

The 200G-AOC-QSFP-DD-4QSFP28 operates at 850nm wavelength, utilizing an 8-channel VCSEL (Vertical-Cavity Surface-Emitting Laser) array for transmission and an 8-channel PIN photodiode array for receiving. The embedded multimode fiber supports distances up to 70 meters over OM3 fiber and extends to 100 meters over OM4 fiber, providing deployment flexibility based on available infrastructure. Because the optical fiber is permanently terminated within the cable assembly, there are no exposed fiber connectors to clean or protect, simplifying installation and reducing maintenance requirements compared to traditional optical patch cables with separate transceivers.

The cable requires host-based Forward Error Correction (FEC) for error-free transmission at a pre-FEC BER of 5×10⁻⁵, ensuring robust signal integrity across the full reach of the assembly. Active optical cables offer inherent immunity to electromagnetic interference, making them ideal for environments with significant electrical noise. The lightweight and flexible construction allows for easier cable routing in congested pathways and improved airflow compared to copper bundles, which is particularly valuable in high-density 4-way breakout deployments where thermal management is critical.

The cable operates from a +3.3V single power supply with maximum power consumption of 4W on the QSFP-DD end and 2.5W on each QSFP28 end. The electrical interface conforms to QSFP-DD MSA V5.0, QSFP28 MSA, CMIS V4.0, and SFF-8636 specifications, ensuring broad compatibility with standard QSFP-DD and QSFP28 host systems from multiple equipment vendors. Our 200G QSFP-DD to 4x50G QSFP28 AOC cables can be encoded for compatibility with over 80 different equipment brands.

The cable incorporates built-in DDM/DOM (Digital Diagnostic Monitoring) functionality, providing real-time diagnostic data including transmitted and received optical power levels, module temperature, bias current, and supply voltage through the MSA-compatible management interface. The cable supports hot pluggability and operates within a 0 to 70°C case temperature range with an MTBF rating of 1,000,000 hours, delivering long-term reliability for mission-critical 200G breakout infrastructure deployments.

Our 200G QSFP-DD to 4x50G QSFP28 active optical cable 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 optical parameter measurements, connector inspection tests, and QSFP-DD/QSFP28 EEPROM memory data validation.