HP P24h G4 FHD Monitor 7VH44AS – 23.8" IPS Full HD Business Monitor
HPE 881457-B21 2.4TB 10K RPM SAS 12Gb/s SFF Hard Drive
HPE 865408-B21 500W Flex Slot Platinum Hot-Plug Low-Halogen Power Supply Kit
HPE 865408-B21 500W Flex Slot Platinum Hot-Plug Low-Halogen Power Supply Kit
The HPE 865408-B21 is a 500W Flex Slot Platinum hot-plug power supply kit designed for compatible HPE ProLiant server platforms. Featuring a high-efficiency Platinum-rated design, Flex Slot form factor, hot-plug capability, and a low-halogen construction, it provides reliable and efficient power delivery for enterprise server environments, replacement requirements, and data-center maintenance.
Description
The HPE 865408-B21 is a 500W Flex Slot Platinum Hot-Plug Low-Halogen Power Supply Kit engineered for use in compatible HPE ProLiant server systems. It is designed to provide efficient, dependable power delivery while supporting the serviceability and high-availability requirements of modern enterprise data centers.
Using the HPE Flex Slot form factor, this power supply is designed for HPE server platforms that support Flex Slot power supplies. Its Platinum efficiency rating helps reduce energy losses and operating costs compared with lower-efficiency power supply designs.
The hot-plug architecture allows the power supply to be replaced or serviced in supported redundant configurations without requiring the entire server to be powered down, helping minimize service interruptions and simplify data-center maintenance.
Key Features
- HPE Part Number: 865408-B21
- Product: HPE 500W Flex Slot Platinum Power Supply
- Power Output: 500W
- Form Factor: HPE Flex Slot
- Efficiency Rating: 80 PLUS Platinum
- Installation: Hot-Plug
- Construction: Low-Halogen
- Product Type: Server Power Supply Kit
- Application: HPE ProLiant enterprise servers
- Primary Use: Server replacement, expansion, maintenance, and spare-parts inventory
500W Power Capacity
With a rated output of 500 watts, the 865408-B21 is designed to supply the electrical power required by compatible HPE server configurations.
The 500W capacity makes it suitable for server configurations with moderate power requirements, while the Flex Slot design allows the PSU to integrate into compatible HPE server chassis without requiring a conventional ATX-style power supply.
Actual available power and system compatibility depend on the specific HPE server model and configuration.
Platinum Efficiency
The HPE 865408-B21 features a Platinum efficiency rating, helping minimize electrical energy lost as heat during operation.
Higher-efficiency power supplies can provide several advantages in data-center environments:
- Reduced energy waste
- Lower heat generation
- Improved power utilization
- Potentially lower cooling requirements
- Better overall data-center energy efficiency
For servers operating continuously, efficient power conversion can contribute to reduced operating costs over the equipment’s service life.
HPE Flex Slot Design
The Flex Slot architecture provides a compact power-supply format developed for supported HPE ProLiant servers.
Flex Slot power supplies are designed to provide flexibility in server configuration and power capacity while maintaining a standardized physical form factor across supported platforms.
Important: Flex Slot power supplies are intended for compatible HPE server systems and should not be treated as universal replacement PSUs. Always verify the exact server model and supported PSU options before installation.
Hot-Plug Capability
The hot-plug design is intended for supported HPE server configurations with redundant power supplies.
In a properly configured redundant server, a failed PSU can be replaced while the remaining power supply continues supplying the required system power.
This capability is particularly valuable in:
- Data centers
- Enterprise server rooms
- High-availability environments
- Mission-critical applications
- Server clusters
- Continuous-operation infrastructure
Hot-plug operation depends on the server chassis, redundancy configuration, and system design.
Low-Halogen Construction
The 865408-B21 is specified as a low-halogen power supply, supporting HPE’s environmental and material-design objectives.
Low-halogen construction can be particularly relevant for enterprise customers with environmental procurement standards, corporate sustainability policies, and data-center material requirements.
Enterprise Server Applications
The HPE 500W Flex Slot Platinum Power Supply is designed for professional server environments rather than consumer desktop systems.
Potential applications include:
- HPE ProLiant server maintenance
- Enterprise data-center infrastructure
- Server PSU replacement
- Redundant power configurations
- Hardware refurbishment
- IT spare-parts inventory
- Server upgrades
- Data-center equipment lifecycle management
Replacement Power Supply
The 865408-B21 is particularly useful as a replacement component when an existing compatible HPE server experiences a failed or degraded power supply.
Replacing only the affected PSU can help organizations restore server redundancy without replacing the complete server.
For critical systems, maintaining a spare power supply can also reduce recovery time in the event of a PSU failure.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | HPE |
| Part Number | 865408-B21 |
| Product Type | Server Power Supply Kit |
| Power Output | 500W |
| Form Factor | Flex Slot |
| Efficiency | Platinum |
| Hot-Plug | Yes |
| Low-Halogen | Yes |
| Application | Compatible HPE ProLiant Servers |
| Primary Use | Replacement / Maintenance / Redundant Power |
| Installation | HPE Flex Slot-compatible systems |
Designed for Enterprise Reliability
Server power supplies operate continuously and play a critical role in maintaining system stability. The HPE 865408-B21 is designed specifically for supported HPE server platforms and enterprise operating environments.
Its combination of 500W output, Platinum efficiency, Flex Slot architecture, and hot-plug capability makes it a practical choice for maintaining compatible HPE ProLiant infrastructure.
Power Redundancy
When installed in a server supporting multiple Flex Slot power supplies, the 865408-B21 can be used as part of a redundant power configuration.
A redundant configuration can help protect against single-PSU failures by allowing the remaining PSU or PSUs to continue powering the system.
This is especially important for servers supporting:
- Business-critical applications
- Databases
- Virtualization
- Enterprise workloads
- Network services
- Storage services
- Continuous-operation environments
The exact redundancy capabilities depend on the host server and installed PSU configuration.
Installation and Compatibility
Before purchasing or installing the HPE 865408-B21, verify the following:
- The target server supports HPE Flex Slot power supplies.
- The server supports a 500W Platinum PSU configuration.
- The PSU wattage is sufficient for the complete server configuration.
- The existing power supply has the appropriate physical and electrical specifications.
- The server supports hot-plug operation.
- Any required power cords or accessories are available.
Compatibility should be confirmed against the exact HPE server model before purchase.
The HPE product page identifies the 865408-B21 specifically as the HPE 500W Flex Slot Platinum Hot-Plug Low Halogen Power Supply Kit.
Ideal for
The HPE 865408-B21 is suitable for:
- Enterprise IT departments
- HPE ProLiant server administrators
- Data-center operators
- Server repair specialists
- IT hardware resellers
- System integrators
- Server refurbishment businesses
- Spare-parts inventories
- Enterprise infrastructure maintenance
Product Benefits
500W Enterprise Power
Provides up to 500 watts of power capacity for compatible HPE server configurations.
Platinum Efficiency
High-efficiency power conversion helps reduce energy losses and heat generation.
Flex Slot Compatibility
Uses the HPE Flex Slot form factor for supported ProLiant server platforms.
Hot-Plug Design
Supports convenient replacement in compatible redundant server configurations.
Low-Halogen Construction
Designed with low-halogen materials in accordance with HPE’s product specifications.
Ideal Replacement Component
Provides a practical replacement option for failed or aging Flex Slot power supplies.
Data-Center Ready
Designed for professional server environments where power reliability and serviceability are important.
What’s Included
Recommended listing contents:
- 1 × HPE 865408-B21 500W Flex Slot Platinum Hot-Plug Low-Halogen Power Supply Kit
Power cords and additional accessories should only be listed as included if they are physically supplied with your inventory.
Important Compatibility Notice
The 865408-B21 is not a universal computer power supply. It is an HPE Flex Slot server PSU intended for compatible HPE ProLiant platforms.
Customers should verify the exact server model and HPE-supported power-supply configuration before ordering.
The 500W rating describes the PSU’s maximum rated output and should not be interpreted as the server’s actual power consumption.
Product Summary
The HPE 865408-B21 500W Flex Slot Platinum Hot-Plug Low-Halogen Power Supply Kit is an enterprise server power component designed for compatible HPE ProLiant systems.
With 500W output, Platinum efficiency, Flex Slot form factor, hot-plug functionality, and low-halogen construction, it provides an efficient and serviceable power solution for enterprise server environments.
It is an excellent choice for server replacement, redundant power configurations, data-center maintenance, hardware refurbishment, and enterprise spare-parts inventory.
Brand: HPE
Part Number: 865408-B21
Power: 500W
Form Factor: Flex Slot
Efficiency: Platinum
Hot-Plug: Yes
Low-Halogen: Yes
Product Type: Server Power Supply Kit
Application: Compatible HPE ProLiant Servers
Primary Use: Replacement / Maintenance / Redundant Power
Related products
-
Oracle 7082782 770W Power Supply Unit (PSUS_A) – Fujitsu/Oracle M10-1
Read more
Oracle 7082782 770W Power Supply Unit (PSUS_A) for Fujitsu/Oracle M10-1
The Oracle 7082782 770W Power Supply Unit (PSUS_A) is an enterprise server power supply designed for the Fujitsu/Oracle SPARC M10-1 platform. This 770W PSU provides reliable power conversion for compatible server configurations and is an ideal replacement component for server maintenance, repair, refurbishment, and data-center spare-parts inventory.
Quick View -
HP 3PAR M6720 580W Internal Power Supply – 682373-001
Read more
HP 3PAR M6720 580W Internal Power Supply – 682373-001
Genuine HP/HPE 3PAR 580W internal power supply designed for M6720 and compatible 3PAR StoreServ storage systems. Featuring hot-pluggable and redundant operation, internal active-fan cooling, and 110–115V input, the 682373-001 is an ideal replacement power module for maintaining reliable storage infrastructure.
Quick View -
HPE 684530-201 1500W Common Slot Platinum Power Supply
Read more
HPE 684530-201 1500W Common Slot Platinum Hot-Plug Redundant Power Supply
HPE 1500W Common Slot Platinum power supply designed for compatible HPE ProLiant server and HPE infrastructure configurations. Featuring 200–240V input, 50–60Hz operation, hot-plug functionality, redundant power support, and Platinum-class efficiency, it provides reliable, high-capacity power delivery for demanding enterprise server environments.
Quick View -
Dell L180ES-01 180W Power Supply for Dell OptiPlex 5050
Read more
Dell L180ES-01 180W Power Supply for Dell OptiPlex 5050
Power your Dell OptiPlex 5050 with the genuine Dell L180ES-01 180W OEM power supply. Engineered for reliable, energy-efficient operation, this original replacement PSU delivers stable power output and seamless compatibility with supported Dell OptiPlex systems. Ideal for replacing a faulty power supply or restoring your desktop to factory performance.
Quick View
