HPE 800W Hot-Plug Power Supply (P40403-B21) for ProLiant

Equipment Overview

The HPE 800W power supply unit (P40403-B21) is an enterprise-class hot-plug redundant power solution designed for continuous 24×7 operation in server infrastructure. It delivers 800 W of output power and supports hot-swap replacement, enabling maintenance without server downtime. This unit is intended for rack and tower servers requiring reliable, serviceable power delivery in data center environments. The P40403-B21 is suited for deployments that demand high availability and fault tolerance.

Main Parameters

• Part Number (PN): P40403-B21
• Brand: HPE
• Model: HPE 800W
• Power Output: 800 W
• Type: Hot-plug (hot-swappable)
• Class: Enterprise server grade (24×7 operation)
• Redundancy: Supports 1+1 redundant configuration for fault tolerance

Key Advantages

This power supply is selected for enterprise projects due to its hot-plug capability, which allows replacement of a failed unit without powering down the server. The 800 W capacity provides sufficient headroom for typical rack and tower server loads, while the 1+1 redundancy support ensures uninterrupted operation in mission-critical environments. Its enterprise-class design is optimized for continuous duty cycles common in data centers.

Compatibility & Integration

The P40403-B21 is designed for HPE rack and tower servers that accept hot-plug power supplies. Exact server model compatibility must be verified at the time of order. The unit conforms to standard HPE power supply form factors and electrical interfaces used across the supported server portfolio.