NVIDIA Mellanox InfiniBand Twin-Port HDR 400Gb/s to 4x100Gb/s OSFP Active Optical Splitter Cable 15m - MFA7U20-H015
This active optical splitter cable is the NVIDIA Mellanox MFA7U20-H015, an OSFP-to-4xQSFP56 AOC that splits a single twin-port 400 Gb/s InfiniBand HDR link into four independent 100 Gb/s HDR100 channels over a 15-meter reach. This is a refurbished unit, professionally tested and validated by T.E.S IT-SOLUTIONS. It is NOT a passive copper DAC cable. It is NOT compatible with NDR or EDR InfiniBand speeds.
Engineering Context
The MFA7U20-H015 uses VCSEL-based (850 nm) optics with PAM4 modulation to split a twin-port 400 Gb/s HDR OSFP signal into four QSFP56 HDR100 outputs at 100 Gb/s each. The cable uses multimode fiber (MMF) with an LSZH (Low Smoke Zero Halogen) jacket. The 15-meter reach enables long-distance rack-to-rack connectivity that exceeds the physical limits of passive copper DAC cables. Each QSFP56 end provides an independent HDR100 link.
Deployment and Use Cases
The MFA7U20-H015 is deployed in InfiniBand HDR fabrics where a single twin-port 400 Gb/s OSFP switch port must fan out to four separate HDR100 host channel adapters across distances up to 15 meters. This topology enables 4:1 oversubscription from NVIDIA Quantum HDR switches to ConnectX-6 HDR100 adapters in HPC clusters and AI training environments. The 15-meter reach covers inter-rack and cross-pod distances in large-scale data centers.
Technical Specifications
Model: MFA7U20-H015
Cable Type: Active Optical Splitter Cable (AOC)
Connector: OSFP to 4x QSFP56
Data Rate: 400 Gb/s (twin-port HDR) to 4x 100 Gb/s (HDR100)
Protocol: InfiniBand HDR / HDR100
Signaling: PAM4
Length: 15 meters
Fiber Type: Multimode Fiber (MMF)
Optics: VCSEL (850 nm)
Jacket: LSZH
Condition: Refurbished
Compatibility and Hard Constraints
The MFA7U20-H015 requires one OSFP twin-port HDR port upstream and four QSFP56 HDR100 ports downstream. It is NOT compatible with InfiniBand NDR (800 Gb/s) or EDR (100 Gb/s) equipment. It is NOT compatible with QSFP28 ports (different connector and signaling). The downstream QSFP56 ends are NOT OSFP. It does NOT support Ethernet protocols. Compatible switches include NVIDIA Quantum HDR switches with OSFP twin-port HDR ports. Compatible adapters include ConnectX-6 HDR100 series (MCX653105A-HDAT, MCX653106A-ECAT).
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS provides this MFA7U20-H015 as a professionally refurbished unit with signal integrity testing and connector inspection. Technical consultation is available. Global shipping with 1-3 business day handling time.