P49762-B21 HPE Transceiver

High-Density 400G OSFP SR Multimode Transceiver for Ethernet and InfiniBand Fabrics with the P49762-B21

The P49762-B21 is an HPE OSFP short-reach optical transceiver engineered for 400GbE and 400G InfiniBand links in modern leaf/spine networks and GPU-cluster fabrics. By using 850nm SR multimode optics, the P49762-B21 targets low-latency, high-throughput connectivity within rows or between adjacent racks where predictable link budgets and repeatable deployment are required.

Designed for high-port-density switches and fabric nodes, the P49762-B21 supports consolidated 400G uplinks and switch-to-switch trunks without changing the broader platform architecture. Its OSFP mechanical profile aligns with current 400G switching ecosystems, while the MTP/MPO interface simplifies parallel-fiber cabling strategies typical for SR optics. For AI/HPC environments, the P49762-B21 enables bandwidth scaling across InfiniBand domains that interconnect GPU servers, reducing oversubscription risk and keeping east-west traffic on high-speed optical paths. With up to 50m reach on multimode, the P49762-B21 is optimized for structured cabling in short-reach data centre topologies.

Why Choose the P49762-B21?

The P49762-B21 delivers a practical density-to-performance profile for 400G fabrics by focusing on short-reach multimode links where power, latency, and operational simplicity matter. It supports scalable build-outs for spine uplinks and cluster interconnects, helping standardize optics across Ethernet and InfiniBand segments while maintaining enterprise-grade deployment consistency.

HPE designs optics to integrate cleanly with data centre networking standards, emphasizing interoperability within validated platforms, controlled component quality, and predictable lifecycle behavior. This engineering approach supports reliable fabric operations and aligns with structured cabling, change-control, and serviceability expectations in enterprise environments.

Key Applications:

• AI and GPU cluster InfiniBand interconnects
• 400GbE leaf/spine uplinks
• Switch-to-switch fabric trunks
• Short-reach within-row optical links

At Happyware - Server Hardware you benefit from non-binding offers tailored to your deployment plan for the P49762-B21 and the option to extend the warranty up to 6 years to protect long-lived fabric investments.