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Anthony Reed
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High-capacity DC PSU delivered excellent stability.
798099-B21
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HPE 2650W -48VDC Ht Plg PS Kit
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798099-B21
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- HPE 2650W -48VDC Ht Plg PS Kit
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798099-B21 Overview
798099-B21 is a 750W power supply with a non-modular design built in the standard ATX form factor. It is 80 PLUS Gold certified, supports an input voltage range of 100–240V, and employs active PFC to ensure efficient power conversion. The unit is equipped with a robust 120mm fan featuring ball bearings for reliable cooling and stable operation even under heavy loads, and it incorporates essential protections such as OCP, OVP, and SCP.
It comes well-equipped with a complete assortment of cables and connectors, including one ATX 24-pin connector, one EPS (CPU) 4+4 pin, three PCIe (6+2) connectors ideal for modern GPUs, and six SATA power connectors for storage drives. With an impressive efficiency rating of 94%, flat cables for improved airflow and neat cable management, and a design optimized for low noise levels, 798099-B21 is a dependable power solution for high-performance gaming systems, workstations, and enterprise servers.
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798099-B21 Specifications
- Product Type
- Power Supply
- Wattage
- 750W
- Use Case
- Enterprise Server / Workstation / Gaming
- Form Factor
- ATX
- Modularity
- Non-Modular
- 80 PLUS Certification
- Gold
- Rail Configuration
- Single Rail
- Certifications
- 80 PLUS / CE / FCC / UL / ROHS
- Remote Monitoring
- N/A
- Input Voltage
- 100–240V
- Hot-Swap Capable
- No
- PFC (Power Factor Correction)
- Active PFC
- Fan Size
- 120mm
- Fan Bearing Type
- Ball
- Zero RPM Mode
- Yes
- Efficiency Rating
- 94%
- Protections
- OCP / OVP / SCP
- ATX 24-Pin Connectors
- 1
- EPS (CPU) 4+4 Pin
- 1
- PCIe (6+2) Connectors
- 3
- SATA Power Connectors
- 6
- Molex Connectors
- 2
- Floppy Connector
- No
- Cable Type
- Flat
- RGB Lighting
- No
- MTBF (Mean Time Between Failures)
- 150,000 hours
- Operating Temperature
- 50°C
- Product Name
- 798099-B21 750W ATX Power Supply
- Height
- 3.4 inches
- Width
- 5.5 inches
- Depth
- 5.9 inches
- Weight
- 6.5 lbs
798099-B21 Use Case
Telecom Central Office Power Backbone Upgrade with HPE 798099-B21 2650W –48VDC Hot-Plug PS Kit
In a regional telecom central office, the HPE 798099-B21 2650W –48VDC Hot-Plug Power Supply Kit retrofits existing blade-server enclosures to run directly off the –48V battery plant. This solution delivers 99% efficiency, reduces cooling load by 20%, and ensures seamless hot-swap redundancy—minimizing downtime and maximizing network availability.
Hyperscale Data Center DC-Distribution Efficiency Optimization
A hyperscale cloud operator integrates the HPE 2650W –48VDC power kit into its new compute clusters to eliminate AC-DC conversion stages. By distributing –48VDC directly to server nodes, the operator achieves a 12% improvement in PUE (Power Usage Effectiveness), lowers utility costs by 15%, and accelerates capacity deployment with plug-and-play hot-swap capability.
Edge Computing Site Resilience for Remote Industrial Automation
At a remote manufacturing facility, edge-compute racks are powered by a –48V DC solar-battery bank complemented by the HPE 798099-B21 2650W Hot-Plug PS Kit. This configuration provides continuous DC power—even during grid outages—while enabling live PSU replacement. The result is 100% operational uptime, streamlined maintenance workflows, and a 30% reduction in backup generator runtime.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 798099-B21 |  720620-B21 |  798342-B21 |  748287-B21 |  784582-B21 | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 750W | 750W | 850W | 850W | 750W |
| Use Case | Enterprise Server / Workstation / Gaming | Gaming | Gaming | Gaming / Workstation / Server | Gaming / Workstation |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Non-Modular | Semi-Modular | Modular | Modular | Modular |
| 80 PLUS Certification | Gold | Gold | Gold | Gold | Gold |
| Rail Configuration | Single Rail | Multi Rail | Single Rail | Single Rail | Single Rail |
| Certifications | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS | 80 PLUS, CE, FCC, UL, RoHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS |
| Remote Monitoring | N/A | No | No | N/A | No |
| Input Voltage | 100–240V | 100–240V | 100–240V | 100–240V | 110–240V |
| 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 | 135mm | 135mm |
| Fan Bearing Type | Ball | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic |
| Zero RPM Mode | Yes | Yes | Yes | Yes | Yes |
| Efficiency Rating | 94% | 92% | 92% | 94% | 94% |
| Protections | OCP / OVP / SCP | OCP/OVP/UVP/SCP/OTP | OCP, OVP, UVP, SCP, OTP | OCP, OVP, UVP, SCP, OTP, Surge | OCP / OVP / SCP / OTP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 1 | 1 | 2 | 2 | 1 |
| PCIe (6+2) Connectors | 3 | 2 | 4 | 3 | 2 |
| SATA Power Connectors | 6 | 6 | 8 | 8 | 6 |
| Molex Connectors | 2 | 2 | 4 | 4 | 4 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Flat | 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 | 150,000 hours | 150,000 hours |
| Operating Temperature | 50°C | 50°C | 50°C | 50°C | 55°C |
| Product Name | 798099-B21 750W ATX Power Supply | 720620-B21 High-Efficiency Semi-Modular ATX Power Supply | 798342-B21 High Performance Modular ATX Power Supply | 748287-B21 High-Performance Modular ATX Power Supply | 784582-B21 High Performance Modular ATX Power Supply |
| Height | 3.4 inches | 3.4 inches | 5.5 inches | 5.5 inches | 3.38 inches |
| Width | 5.5 inches | 5.9 inches | 8.6 inches | 6.3 inches | 5.91 inches |
| Depth | 5.9 inches | 5.5 inches | 6.3 inches | 10.2 inches | 5.51 inches |
| Weight | 6.5 lbs | 5 lbs | 4.5 lbs | 5.8 lbs | 6.6 lbs |
Reviews & Ratings
S
Shoaib Anwar
4
Handled peak loads without issues.
P
Paul Simmons
5
OEM unit installed smoothly.
N
Naeem Ashraf
5
Strong power output.
J
Jari Virtanen
5
Reliable DC solution.
Questions & Answers
What is the HPE 2650W -48VDC Hot Plug Power Supply Kit (SKU: 798099-B21)?
The HPE 2650W -48VDC Hot Plug Power Supply Kit (798099-B21) is a high-efficiency DC power module designed for HPE BladeSystem enclosures, delivering 2650W of redundant, hot-pluggable -48VDC power for mission-critical environments.
Which HPE systems are compatible with the 798099-B21 power supply kit?
The 798099-B21 power supply kit is compatible with HPE BladeSystem c7000 and c3000 enclosures, as well as select ProLiant carrier-grade servers that require -48VDC input.
What are the input and output specifications of this power supply?
This power supply accepts a -48VDC input and delivers 2650W of DC output with an efficiency rating up to 94%, supporting continuous operation in telecom and data-center deployments.
Is the HPE 2650W -48VDC power supply hot-pluggable?
Yes. The HPE 2650W -48VDC power supply is fully hot-pluggable, allowing safe installation and removal without shutting down the system.
How does this kit improve data center power efficiency?
With up to 94% efficiency and DC-to-DC conversion, the -48VDC kit minimizes energy losses, lowers cooling requirements, and reduces operational costs in high-density racks.
Does the power supply support redundant configurations?
Yes. It supports N+1 and N+N redundancy, enabling continuous operation by automatically switching to backup modules if a primary supply fails.
What safety and compliance standards does it meet?
The kit is UL and CSA listed, CE marked, and compliant with IEC 60950-1 and RoHS directives, ensuring certified safety and environmental performance.
How do I install the HPE 2650W -48VDC power supply?
Slide the module into an available power bay until it clicks, ensure proper -48VDC bus connection, and verify the LED status turns green before full operation.
What warranty coverage does this power supply include?
HPE provides a standard one-year limited hardware warranty with this kit, including parts and labor support from certified technicians.
Can I use the 798099-B21 kit in remote or outdoor telecom shelters?
Yes. Its wide operating voltage tolerance and -48VDC design make it ideal for remote and outdoor telecom installations when housed in a suitable enclosure.
What is the operating temperature range?
The HPE 2650W -48VDC kit operates reliably from 0°C to 40°C, with storage tolerance from -20°C to 70°C, meeting standard data center environmental requirements.
How does a -48VDC power supply differ from an AC model?
A -48VDC model eliminates AC-to-DC conversion, reducing energy loss and heat generation, which is critical for telecommunications and high-efficiency data environments.
Is the 798099-B21 backward compatible with previous-generation enclosures?
Yes. It supports HPE BladeSystem c7000 and c3000 enclosures from G6 through Gen10 when -48VDC input is required.
What should I do if a power supply fails?
Confirm LED error codes, reseat the module, swap with a redundant supply, and check system logs; if issues persist, contact HPE support for RMA or on-site service.
How do I source replacement parts or service kits?
Order genuine HPE replacement modules and service kits through HPE authorized channel partners, HPE Support Center, or your preferred certified reseller.
Where can I find detailed product documentation and firmware updates?
Access the HPE Support Center online, search for SKU 798099-B21, and download user guides, installation instructions, and the latest firmware releases.