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Reliable 500W PSU with smooth hot-swap capability.
865408-B21
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HPE 500W FS PLAT HT PLG LH PWR SPLY KIT PL-SI
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Name:
865408-B21
- Description:
- HPE 500W FS PLAT HT PLG LH PWR SPLY KIT PL-SI
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- Hpe
- Condition:
- Warranty:
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- List Price:
$351.04
- Price:
$105.3270% off
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1
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865408-B21 Overview
865408-B21 is an 850W, Modular ATX power supply featuring Gold 80 PLUS certification and a wide input voltage range of 100–240V. It is engineered with Active PFC, a 120mm fan using a Fluid Dynamic bearing, and comprehensive protections including OCP, OVP, and SCP, ensuring reliable performance for high-demand applications.
The unit offers robust connectivity with 1 ATX 24-Pin connector, 2 EPS (CPU) 4+4 Pin connectors, 2 PCIe (6+2) connectors, and 6 SATA power connectors, paired with an efficient 94% performance rating. Built with high-quality sleeved cables for reduced noise levels, it is ideally suited for gaming and workstation environments where stability and low acoustic output are paramount.
865408-B21 price is $105.32, a 70% saving from the Hpe list price of $351.04. 865408-B21 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for 865408-B21 for additional pricing. Browse the full Hpe Power Supplies series or explore all Hpe products.
865408-B21 Specifications
- Product Type
- Power Supply
- Wattage
- 850W
- Use Case
- Gaming / Workstation
- Form Factor
- ATX
- Modularity
- Modular
- 80 PLUS Certification
- Gold
- Rail Configuration
- Multi Rail
- Certifications
- 80 PLUS
- Remote Monitoring
- No
- Input Voltage
- 100–240V
- Hot-Swap Capable
- No
- PFC (Power Factor Correction)
- Active PFC
- Fan Size
- 120mm
- Fan Bearing Type
- Fluid Dynamic
- Zero RPM Mode
- Yes
- Efficiency Rating
- 94%
- Protections
- OCP / OVP / SCP
- ATX 24-Pin Connectors
- 1
- EPS (CPU) 4+4 Pin
- 2
- PCIe (6+2) Connectors
- 2
- SATA Power Connectors
- 6
- Molex Connectors
- 2
- Floppy Connector
- No
- Cable Type
- Sleeved
- RGB Lighting
- No
- MTBF (Mean Time Between Failures)
- 150,000 hours
- Operating Temperature
- 50°C
- Product Name
- 865408-B21 High Performance Modular ATX Power Supply
- Height
- 5.5 inches
- Width
- 4.3 inches
- Depth
- 6.0 inches
- Weight
- 7.5 lbs
865408-B21 Use Case
High-Availability Virtualization Cluster with HPE 500W Hot-Plug Power Supply
In large enterprise data centers running VMware or Hyper-V clusters, the HPE 500W FS PLAT HT PLG LH Power Supply Kit (865408-B21) delivers redundant, hot-swappable power without interrupting virtual machine workloads. Benefits: • Zero downtime maintenance—swap failed units under full load • SLA compliance—continuous operation for business-critical applications • Simplified capacity planning—500W headroom for burst CPU/GPU demands
Edge-Site Retail Server Reliability for Point-of-Sale and Inventory Management
Retail chains deploying HPE ProLiant servers at remote or branch locations use the 865408-B21 kit to ensure stable power in constrained racks. Benefits: • Compact, full-height form-factor—fits small cabinets • Hot-plug replacement—minimizes store downtime during peak hours • Predictable failover—maintains POS transactions, inventory sync and customer experience
Rapid Mean Time to Repair (MTTR) in Remote Data Center Environments
Colocation facilities and telecommunications shelters rely on the HPE 500W Platinum efficiency power supply to reduce MTTR when field failures occur. Benefits: • Tool-less, front-accessible insertion—accelerates on-site service • Platinum efficiency—lowers cooling costs in harsh environments • Standardized spare inventory—streamlines logistics and support contracts
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 865408-B21 |  Q0H80A |  JG137A |  J9405B |  JL086A | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 850W | 650W | 750W | 850W | 650W |
| Use Case | Gaming / Workstation | Gaming / Workstation | Gaming / Workstation / Rack Server | Workstation / Gaming | Gaming / Workstation / Server |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Modular | Modular | Modular | Semi-Modular | Modular |
| 80 PLUS Certification | Gold | Gold | Gold | Gold | Gold |
| Rail Configuration | Multi Rail | Multi Rail | Single Rail | Multi Rail | Single Rail |
| Certifications | 80 PLUS | 80 PLUS | 80 PLUS / CE / FCC / UL | 80 PLUS / CE / FCC / UL / CB / TUV / RoHS | 80 PLUS / CE / FCC / UL / ROHS |
| Remote Monitoring | No | No | PMBus | No | No |
| Input Voltage | 100–240V | 100–240V | 100–240V | 100–240V | 100–240V |
| Hot-Swap Capable | No | No | No | No | No |
| PFC (Power Factor Correction) | Active PFC | Active PFC | Active PFC | Active PFC | Active PFC |
| Fan Size | 120mm | 120mm | 120mm | 120mm | 120mm |
| Fan Bearing Type | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Dual Ball | Fluid Dynamic |
| Zero RPM Mode | Yes | Yes | Yes | No | Yes |
| Efficiency Rating | 94% | 92% | 92% | 92% | 92% |
| Protections | OCP / OVP / SCP | OCP / OVP / SCP | OCP / OVP / SCP | OCP / OVP / UVP / OTP | OCP / OVP / SCP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 2 | 2 | 2 | 1 | 1 |
| PCIe (6+2) Connectors | 2 | 3 | 3 | 2 | 2 |
| SATA Power Connectors | 6 | 6 | 6 | 8 | 4 |
| Molex Connectors | 2 | 2 | 4 | 4 | 2 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Sleeved | Sleeved | Sleeved | Sleeved | Sleeved |
| RGB Lighting | No | No | No | No | No |
| MTBF (Mean Time Between Failures) | 150,000 hours | 150,000 hours | 150,000 hours | 100,000 hours | 100,000 hours |
| Operating Temperature | 50°C | 50°C | 50°C | 50°C | 50°C |
| Product Name | 865408-B21 High Performance Modular ATX Power Supply | Q0H80A 650W Gold Modular ATX Power Supply | JG137A High Performance Modular Power Supply | J9405B High-Performance ATX Power Supply | JL086A High-Efficiency Modular ATX Power Supply |
| Height | 5.5 inches | 5.5 inches | 5.5 inches | 5.5 inches | 5 inches |
| Width | 4.3 inches | 6.3 inches | 7.0 inches | 5.3 inches | 6 inches |
| Depth | 6.0 inches | 5.8 inches | 6.0 inches | 7.1 inches | 7 inches |
| Weight | 7.5 lbs | 8.5 lbs | 8 lbs | 5 lbs | 8 lbs |
Reviews & Ratings
R
Rizwan Malik
4
Consistent power delivery under load.
D
Daniel Fox
5
OEM unit fit without issues.
S
Sami Ullah
4
Good performance for production servers.
J
Johan Nilsson
5
Dependable power option.
Questions & Answers
What is the HPE 865408-B21 500W FS Platinum Hot-Plug Power Supply Kit?
The HPE 865408-B21 is a 500-watt, full-form factor, Platinum-efficient, hot-plug server power supply kit designed for enhanced performance and reliability in HPE ProLiant systems.
Which HPE ProLiant servers are compatible with the 865408-B21 power supply?
The 865408-B21 is compatible with select HPE ProLiant DL and ML Gen8 and Gen9 rack-mount servers, including DL380, DL360, ML350, and related chassis requiring a Platinum 500W FS module.
What input voltage range does the HPE 865408-B21 support?
This power supply supports a universal input voltage of 100–240 VAC at 50–60 Hz, allowing seamless operation in global data-center environments.
What efficiency rating does the 500W FS Platinum power supply offer?
The 865408-B21 is 94% efficient under typical load conditions, meeting 80 PLUS Platinum standards to reduce energy consumption and lower operating costs.
Can I hot-swap the HPE 865408-B21 power supply without shutting down my server?
Yes, the 865408-B21 is hot-plug capable, enabling you to replace or add a power supply module without powering off the server or interrupting workloads.
Does the 865408-B21 support redundant power configurations?
The module supports N+1 and 2+1 redundancy when paired with identical HPE Platinum power supplies, ensuring uninterrupted operation during individual supply failures.
What form factor and dimensions does the HPE 865408-B21 have?
This full-form factor power supply measures 3.6 x 5.0 x 9.5 inches (W x H x D) and weighs approximately 2.1 pounds, fitting standard HPE server bays.
Which connectors are included with the HPE 865408-B21 power supply?
The unit features a C14 AC inlet for input power and supports integrated server board connectors for direct chassis installation without additional cabling.
What certifications does the HPE 500W Platinum power supply hold?
The 865408-B21 is certified to UL, CB, CE, FCC, RoHS, and REACH standards, ensuring global safety and environmental compliance.
How does the 865408-B21 improve server reliability?
With Platinum-level efficiency, active power factor correction, and fault-tolerant hot-swap design, this module minimizes downtime and prolongs server lifespan.
How do I install or replace the HPE 865408-B21 power supply kit?
Slide the hot-plug module into the designated server bay until it clicks, secure the lever, and verify status LEDs to confirm proper installation.
What warranty does HPE provide for the 865408-B21 power supply?
HPE backs the 865408-B21 with a one-year limited hardware warranty, with options to extend through HPE Care Pack services.
Where can I purchase a genuine HPE 865408-B21 replacement power supply?
You can buy the 865408-B21 through authorized HPE resellers, HPE’s online storefront, or certified distribution partners to ensure authentic parts and warranty coverage.
How much power does the HPE 500W FS Platinum module deliver to my server components?
It provides a continuous 500 watts of output power with stable voltage rails to support CPUs, memory, and storage under peak workloads.
Is technical support available for installing the 865408-B21 power supply?
Yes, HPE offers 24x7 technical support and online documentation to guide you through installation, configuration, and troubleshooting.
What differentiates the 865408-B21 from HPE 750W or 1.2KW power supplies?
The 500W Platinum kit is optimized for midrange systems and balanced energy usage, while 750W and 1.2KW models deliver higher power density for larger server configurations.