NVIDIA Mellanox MFA7U20-H050 HDR Active Optical Splitter Cable, OSFP to 4×QSFP56, 400Gb/s to 4×100Gb/s, 50m LSZH: This is a 50-meter active optical splitter cable (AOC) engineered for InfiniBand HDR fabrics. The single OSFP twin-port end aggregates 400Gb/s of bandwidth and breaks out to four QSFP56 ports each carrying HDR100 (100Gb/s). It is not a passive copper DAC, not an Ethernet-only cable, and not a 1:1 point-to-point AOC. Condition: New.
Engineering Context: Aggregate bandwidth is 400Gb/s on the OSFP source side (2×HDR 200Gb/s lanes), splitting into 4×100Gb/s HDR100 connections on the QSFP56 destination side. At 50 meters, copper DAC is not viable for HDR signaling — active optical fiber maintains signal integrity end-to-end. The cable is bus-powered through the OSFP and QSFP56 hosts (no external supply) and uses a Low Smoke Zero Halogen (LSZH) jacket suitable for high-density data center plenums.
Deployment & Use Cases: Connecting an NVIDIA Quantum HDR switch OSFP port to four ConnectX-6 HDR100 adapters in a 4-way fan-out topology; expanding HDR fabric port density across rows in HPC clusters; AI training fabrics where one switch port serves four compute nodes; storage interconnect for parallel filesystems (Lustre, GPFS) over IB HDR.
- MPN: MFA7U20-H050
- Cable Type: Active Optical Cable (AOC) — splitter / breakout
- Connectors: 1× OSFP (twin-port) → 4× QSFP56
- Aggregate Data Rate: 400Gb/s (source) → 4×100Gb/s HDR100 (destinations)
- Protocol: InfiniBand HDR / HDR100
- Length: 50 meters
- Fiber: Multimode optical fiber, factory-terminated
- Jacket: LSZH (Low Smoke Zero Halogen)
- Power: Bus-powered from OSFP / QSFP56 host ports
- Condition: New
Compatibility & Constraints: Compatible with NVIDIA Quantum HDR switches with OSFP twin-port outputs and ConnectX-6 HDR100 adapters on the QSFP56 side. Not compatible with NDR (400G/800G) or EDR-only systems, not a substitute for a 1:1 OSFP-to-QSFP56 cable, and not intended for QSFP-DD or pure-Ethernet 100GbE/400GbE deployments. The four QSFP56 legs cannot be operated independently as separate physical cables — they share a single OSFP source port.
Why TES: Each unit is electrically and optically tested, EEPROM/link integrity verified, and shipped from T.E.S IT-SOLUTIONS with 1–3 business day handling and worldwide tracked delivery.