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The MFA7U10-H010 is an active optical splitter cable from NVIDIA Mellanox that breaks one 400G OSFP port into two 200G QSFP56 links over 10 meters of fiber. It suits data center operators who need to fan a 400G switch port out to 200G servers or uplinks without adding switch ports. Active optics carry the signal farther than passive copper DACs, which are typically limited to a few meters at these speeds. It is a niche, vendor-specific part: check that your switch and NICs are on Mellanox's compatibility list before buying.
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This is an NVIDIA Mellanox active optical splitter cable, model MFA7U10-H010. It is a direct attach fiber optic cable that is 10 m long.
It is rated for 400GBase and runs from an OSFP connector to QSFP56 connectors.
