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UPS provides clean, stable power for critical workloads.
AF479A
HPE R18000 DirectFlow - 2U Rackmount Uninterruptible Power S...
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AF479A
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- HPE R18000 DirectFlow - 2U Rackmount Uninterruptible Power System
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AF479A Overview
AF479A is an 850W semi-modular ATX power supply featuring an 80 PLUS Gold certification to ensure high conversion efficiency. It operates on an input voltage range of 100–240V with Active PFC, and its 120mm fan with Fluid Dynamic bearing keeps thermal performance stable while maintaining low noise levels.
Designed for demanding common use cases including gaming, workstation, and enterprise server environments, AF479A incorporates comprehensive protections such as OCP, OVP, UVP, SCP, and OTP. It offers robust connectivity with one ATX 24-pin connector, two EPS (CPU) 4+4 connectors, four PCIe (6+2) connectors, and ten SATA power connectors alongside four Molex connectors, all delivered with high build quality and sleeved cables.
AF479A price is is available on request. Get immediate quote.
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AF479A Specifications
- Product Type
- Power Supply
- Wattage
- 850W
- Use Case
- Gaming / Workstation / Enterprise Server
- Form Factor
- ATX
- Modularity
- Semi-Modular
- 80 PLUS Certification
- Gold
- Rail Configuration
- Single Rail
- Certifications
- 80 PLUS / CE / FCC / UL / CB / TUV / 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
- Fluid Dynamic
- Zero RPM Mode
- Yes
- Efficiency Rating
- 94%
- Protections
- OCP / OVP / UVP / SCP / OTP
- ATX 24-Pin Connectors
- 1
- EPS (CPU) 4+4 Pin
- 2
- PCIe (6+2) Connectors
- 4
- SATA Power Connectors
- 10
- Molex Connectors
- 4
- Floppy Connector
- No
- Cable Type
- Sleeved
- RGB Lighting
- No
- MTBF (Mean Time Between Failures)
- 150,000 hours
- Operating Temperature
- 50°C
- Product Name
- AF479A - 850W Semi-Modular ATX Power Supply Gold
- Height
- 5.5 inches
- Width
- 7.0 inches
- Depth
- 6.0 inches
- Weight
- 4.5 lbs
AF479A Use Case
Mission-Critical Data Center Rack Protection
In a mid-sized enterprise data center hosting virtualization clusters and SAN storage, the AF479A-HPE R18000 DirectFlow 2U Rackmount UPS maintains continuous, low-distortion power through auto-bypass switching during utility failures or voltage sags. Outcome: Achieves industry-leading 99.99% service availability, eliminates VM crashes and storage corruption, and supports seamless server failover without manual intervention.
Telecom Edge Site Power Continuity
At remote cellular base stations and network aggregation nodes, AF479A-HPE R18000 DirectFlow delivers 18 kW of conditioned power in a 2U footprint, safeguarding radios, switches and routers against brownouts and grid outages. Outcome: Ensures uninterrupted voice/data throughput, reduces field-service dispatches by 70%, and upholds SLA commitments for latency-sensitive mobile backhaul.
Industrial Automation and SCADA Uptime Assurance
In automated manufacturing plants running PLCs, HMIs and SCADA controllers, the AF479A-HPE R18000 DirectFlow UPS preserves stable voltage and frequency during power events. Outcome: Prevents production-line stoppages, maintains real-time process control, and cuts unplanned downtime costs by up to 40%, delivering consistent OT data integrity and operational throughput.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
 AF479A |  784582-B21 |  AF463A |  Q0H80A |  J6X43A | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 850W | 750W | 650W | 650W | 750W |
| Use Case | Gaming / Workstation / Enterprise Server | Gaming / Workstation | Enterprise Server / Workstation / Gaming | Gaming / Workstation | Gaming / Workstation |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Semi-Modular | Modular | Modular | Modular | Modular |
| 80 PLUS Certification | Gold | Gold | Gold | Gold | Gold |
| Rail Configuration | Single Rail | Single Rail | Single Rail | Multi Rail | Multi Rail |
| Certifications | 80 PLUS / CE / FCC / UL / CB / TUV / RoHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS | 80 PLUS / CE / FCC / UL / ROHS |
| Remote Monitoring | N/A | No | No | No | No |
| Input Voltage | 100–240V | 110–240V | 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 | 135mm | 120mm | 120mm | 120mm |
| Fan Bearing Type | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic |
| Zero RPM Mode | Yes | Yes | Yes | Yes | Yes |
| Efficiency Rating | 94% | 94% | 94% | 92% | 94% |
| Protections | OCP / OVP / UVP / SCP / OTP | OCP / OVP / SCP / OTP | OCP, OVP, UVP, SCP, OTP | OCP / OVP / SCP | OCP / OVP / UVP / SCP / OTP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 2 | 1 | 1 | 2 | 2 |
| PCIe (6+2) Connectors | 4 | 2 | 2 | 3 | 4 |
| SATA Power Connectors | 10 | 6 | 6 | 6 | 6 |
| Molex Connectors | 4 | 4 | 4 | 2 | 4 |
| 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 | 150,000 hours | 150,000 hours |
| Operating Temperature | 50°C | 55°C | 50°C | 50°C | 50°C |
| Product Name | AF479A - 850W Semi-Modular ATX Power Supply Gold | 784582-B21 High Performance Modular ATX Power Supply | AF463A High Efficiency Modular ATX Power Supply | Q0H80A 650W Gold Modular ATX Power Supply | J6X43A High Performance Modular ATX Power Supply |
| Height | 5.5 inches | 3.38 inches | 5.5 inches | 5.5 inches | 5.1 inches |
| Width | 7.0 inches | 5.91 inches | 5.9 inches | 6.3 inches | 6.3 inches |
| Depth | 6.0 inches | 5.51 inches | 6.1 inches | 5.8 inches | 5.9 inches |
| Weight | 4.5 lbs | 6.6 lbs | 4.2 lbs | 8.5 lbs | 4.5 lbs |
Reviews & Ratings
F
Francesco Ricci
4
DirectFlow cooling keeps temperatures consistent.
O
Oliver Grant
5
Enterprise grade reliability and runtime.
J
Jan Novak
3
Easy rack installation and management.
R
Robert Hayes
4
Excellent protection for data center equipment.
Questions & Answers
What is the power capacity of the HPE R18000 DirectFlow 2U Rackmount Uninterruptible Power System (SKU: AF479A)?
The HPE R18000 DirectFlow UPS delivers up to 18 000 VA (16 200 W) of backup power in a 2U rackmount form factor, ensuring continuous operation for high-density server and networking environments.
What battery runtime can I expect from the HPE R18000 DirectFlow UPS?
With its internal battery pack, the UPS provides up to 10 minutes of runtime at full 18 000 VA load and up to 20 minutes at 9 000 VA, allowing safe shutdown or migration during outages.
Are the batteries in the HPE R18000 DirectFlow UPS hot-swappable?
Yes. The UPS features hot-swappable battery modules with front-access trays, enabling battery replacement without powering down connected equipment.
Can I expand the runtime of the HPE R18000 DirectFlow UPS?
Yes. The system supports optional external battery cabinets to extend runtime without increasing the 2U rack footprint.