HPE 800W Hot-Plug Power Supply P40399-B21

Usage Area

The HPE 800W power supply unit (P40399-B21) is designed for deployment in rack-mount and tower enterprise servers operating in continuous 24×7 data center environments. It provides redundant power delivery for mission-critical server infrastructure, supporting hot-swap maintenance without service interruption. This unit is suitable for configurations requiring fault-tolerant power with 1+1 redundancy architecture to ensure high availability.

Construction Features

• Hot-plug (hot-swappable) form factor enabling live replacement without powering down the server
• Enterprise-class construction rated for continuous round-the-clock operation in server rooms
• Redundancy support (1+1) for improved system uptime and fault tolerance
• Compatible with standard server power bays designed for HPE hot-plug PSUs
• Modular design with direct AC input and DC output for server power distribution
• Built for high-efficiency power conversion to meet enterprise thermal and electrical demands

Technical Parameters

• Part number (PN): P40399-B21
• Manufacturer: HPE
• Model: HPE 800W
• Power output: 800 W
• Type: Hot-plug (hot-swappable)
• Class: Enterprise server grade (24×7 operation)

Standards & Certification

The unit complies with HPE corporate-class quality and safety standards for server power supplies. It is engineered for deployment in enterprise data centers, meeting industry requirements for hot-swap redundancy and continuous-duty operation. Compatibility with specific server models should be verified against HPE platform documentation prior to installation.