P45693-B21 HPE Transceiver

High-Density 400G OSFP Short-Range Optical Transceiver for Ethernet and InfiniBand Fabrics with P45693-B21

P45693-B21 is an HPE OSFP 400Gbps SR-class transceiver engineered for modern AI and HPC interconnects where deterministic latency and high port density are mandatory. Designed for OSFP-based switching platforms, it enables 400GbE and 400G InfiniBand connectivity that aligns with spine/leaf uplinks, aggregation tiers, and scale-out cluster fabrics requiring consistent optical performance.

By implementing a 400G optical lane architecture over an MTP/MPO interface, P45693-B21 supports short-reach links up to 100 m, helping architects keep high-throughput fabrics within a single row or adjacent racks while maintaining clear cabling discipline. The transceiver’s protocol versatility allows a unified inventory model across Ethernet-based data centre networks and InfiniBand cluster interconnects, reducing integration friction when expanding PCIe-attached GPU nodes, high-core-count CPU servers, or storage gateways that depend on predictable east-west bandwidth.

Why Choose the P45693-B21?

P45693-B21 delivers a practical density-to-performance advantage for 400G deployments by enabling OSFP 400G port expansion without changing switching topologies, while keeping link budgets aligned to short-reach data hall layouts. For enterprise operations, P45693-B21 supports scalable fabric growth with a consistent transceiver profile suitable for rapid capacity additions and standardized spares.

HPE designs optics to integrate cleanly with enterprise data centre standards, emphasizing interoperability within validated platforms, controlled manufacturing tolerances, and operational reliability at scale. This engineering approach supports predictable behaviour across large port counts and repeatable rollouts in production environments.

Key Applications:

• 400G InfiniBand AI/HPC cluster interconnect
• 400GbE spine/leaf uplinks
• High-density switching port expansion
• Data centre aggregation and core connectivity

At Happyware - Server Hardware you benefit from non-binding offers tailored precisely to your needs for P45693-B21-based rollouts, helping you plan standardized optics across Ethernet and InfiniBand fabrics with procurement clarity.