HPE 865408-B21 – 500W Flex Slot Platinum Hot Plug Power Supply Kit
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HPE 865408-B21 – 500W Flex Slot Platinum Hot Plug Power Supply Kit
Overview
The HPE 865408-B21 is a 500W Flex Slot Platinum hot-plug power supply kit designed for HPE ProLiant and Apollo enterprise server platforms. It provides efficient and redundant power delivery for server environments requiring reliable uptime and serviceable power infrastructure.
The unit delivers up to 94% efficiency with 80 PLUS Platinum certification, helping reduce power loss and thermal output in enterprise data center deployments. Its compact Flex Slot architecture also improves airflow and enables simplified hot-plug maintenance.
This power supply is commonly deployed in virtualization hosts, application servers, and enterprise compute environments where efficient power management and redundancy are required. It supports hot-plug replacement without interrupting server operation.
The module integrates into HPE Gen9, Gen10, and selected Gen11 server ecosystems using compatible Flex Slot power supply architecture and redundant server configurations.
Typical Deployment Scenarios
Used in HPE ProLiant DL20, DL360, DL380, DL385, ML30, and ML350 server environments requiring redundant hot-plug power supplies. Common in enterprise virtualization clusters, business application servers, and high-availability infrastructure deployments.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | HPE |
| Part Number | 865408-B21 |
| Product Type | Power Supply Kit |
| Power Output | 500W |
| Power Supply Type | Flex Slot |
| Certification | 80 PLUS Platinum |
| Efficiency Rating | Up to 94% |
| Input Voltage | 100–240V AC |
| Input Frequency | 50–60 Hz |
| Hot Plug Support | Yes |
| Form Factor | Plug-in module |
| Compliance | Low Halogen |
| Cooling Type | Integrated fan cooling |
| Installation Type | Internal server power supply |
| Server Compatibility | HPE ProLiant Gen9/Gen10/Gen11 |
Compatibility / Ecosystem
Compatible with HPE ProLiant DL20, DL160, DL180, DL325, DL360, DL380, DL385, ML30, ML350, and selected Apollo server platforms supporting Flex Slot power architecture. Designed for enterprise environments requiring redundant hot-plug power delivery.
Additional information
| Weight | 1.36 kg |
|---|---|
| Dimensions | 22.53 × 6.80 × 4.04 cm |







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