HPE 800W Hot Plug Power Supply (P40402-B21) for ProLiant

Equipment Overview

The HPE 800W P40402-B21 is an enterprise-class server power supply unit designed for continuous 24×7 operation in data center and server room environments. This hot-plug PSU delivers 800W of power to supported rack and tower servers, enabling redundant power configurations for enhanced system availability. The unit is engineered for corporate infrastructure requiring reliable, serviceable power delivery without scheduled downtime. It is suitable for deployment in virtualized environments, business-critical applications, and high-availability server clusters.

Main Parameters

• Part Number (PN): P40402-B21
• Manufacturer: HPE
• Model: HPE 800W
• Power Output: 800 W
• Type: Hot-plug (hot-swappable)
• Class: Enterprise server grade (24×7 operation)

Key Advantages

This power supply supports hot-swap replacement and 1+1 redundancy, allowing maintenance or replacement of a failed unit without powering down the server. The hot-plug design minimizes service time and maximizes uptime for mission-critical workloads. Its enterprise-class construction is rated for continuous operation, making it a dependable choice for managed hosting, corporate data centers, and private cloud infrastructure.

Compatibility & Integration

The P40402-B21 is compatible with select HPE rack and tower server models that accept hot-plug redundant PSUs. Exact server model compatibility must be verified at the time of order. The unit integrates into standard HPE server power backplanes and supports industry-standard hot-plug redundancy configurations.