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Front to back airflow suited our racks.
JPSU-850W-DC-AFO
850W DC POWER SUPPLY FOR QFX5100-96S PSU-SIDE AIRFLOW
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JPSU-850W-DC-AFO
850W DC POWER SUPPLY FOR QFX5100-96S PSU-SIDE AIRFLOW
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JPSU-850W-DC-AFO delivers a robust 850W output in a reliable ATX form factor with a non-modular design, ensuring straightforward installation and maintenance. It boasts an 80 PLUS Gold certification, a wide input voltage range of 100–240V with Active PFC, and a high-quality 120mm fan utilizing a ball bearing, complemented by multiple protections including OCP, OVP, UVP, and SCP for secure operation.
Engineered for high-performance applications, JPSU-850W-DC-AFO provides versatile connectivity with one ATX 24-pin connector, two EPS (CPU) 4+4 pin connectors, three PCIe (6+2) connectors, eight SATA power connectors, and four Molex connectors. With a 92% efficiency rating, premium sleeved cables, low noise levels supported by a zero RPM mode, and an MTBF of 150,000 hours, this power supply is perfectly suited for gaming, workstation, and server environments.
JPSU-850W-DC-AFO price is $3,670.00, a 39.6% saving from the Juniper list price of $6,075.00. JPSU-850W-DC-AFO is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for JPSU-850W-DC-AFO for additional pricing. Browse the full Juniper Power Supplies series or explore all Juniper products.
In ultra-low-latency trading environments, the JPSU-850W-DC-AFO-850W DC power supply delivers 850W of stable DC power to Juniper QFX5100-96S switches with PSU-side airflow. This redundant power setup ensures 99.999% network uptime, minimizes cooling overhead, and accelerates transaction processing, reducing operational risk and supporting real-time market data delivery.
Telecom operators deploy the JPSU-850W-DC-AFO-850W DC power supply to feed QFX5100-96S switches in 5G remote and outdoor shelters. Engineered for PSU-side airflow and extended temperature ranges, it optimizes thermal management, lowers field maintenance, and guarantees continuous backhaul throughput, improving service reliability for latency-sensitive applications.
Manufacturing plants integrate the JPSU-850W-DC-AFO-850W DC power supply with QFX5100-96S switches to power IIoT networks in harsh factory environments. The compact design and efficient PSU-side airflow deliver sustained 850W output, enhance network resilience, and reduce downtime for robotic control and real-time analytics, driving higher throughput and predictive maintenance insights.
To get the detailed certification, please go to the Compliance Center.
 JPSU-850W-DC-AFO |  JPSU-850W-AC-AFI |  JPSU-350-AC-AFO |  QFX3100-PWRAC-560A |  JPSU-400W-AC | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 850W | 850W | 400W | 550W | 400W |
| Use Case | Gaming / Workstation / Server | Gaming / Workstation | Gaming / Workstation / General Use | Gaming / Workstation / Enterprise Server | Gaming / Workstation |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Non-Modular | Modular | Non-Modular | Modular | Non-Modular |
| 80 PLUS Certification | Gold | Gold | Bronze | Gold | 80 PLUS |
| Rail Configuration | Single Rail | Multi Rail | Single Rail | Single Rail | Single Rail |
| Certifications | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS | 80 PLUS / CE / FCC / UL / ROHS |
| Remote Monitoring | No | No | No | 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 | 80mm | 120mm | 120mm |
| Fan Bearing Type | Ball | Fluid Dynamic | Sleeve | Fluid Dynamic | Fluid Dynamic |
| Zero RPM Mode | Yes | Yes | Yes | Yes | Yes |
| Efficiency Rating | 92% | 90% | 87% | 90% | 87% |
| Protections | OCP / OVP / UVP / SCP | OCP / OVP / UVP / SCP / OTP | OCP / OVP / SCP / OTP | OCP / OVP / SCP / OTP | OCP / OVP / SCP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 2 | 2 | 1 | 1 | 1 |
| PCIe (6+2) Connectors | 3 | 3 | N/A | 2 | 2 |
| SATA Power Connectors | 8 | 6 | 2 | 8 | 4 |
| Molex Connectors | 4 | 4 | 1 | 4 | 2 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Sleeved | Sleeved | Flat | Sleeved | Sleeved |
| RGB Lighting | No | No | No | No | No |
| MTBF (Mean Time Between Failures) | 150,000 hours | 150,000 hours | 100,000 hours | 150,000 hours | 100,000 hours |
| Operating Temperature | 40°C | 50°C | 50°C | 50°C | 50°C |
| Product Name | JPSU-850W-DC-AFO | JPSU-850W-AC-AFI | JPSU-350-AC-AFO Power Supply Unit | QFX3100-PWRAC-560A | JPSU-400W-AC Power Supply |
| Height | 3.4 inches | 3.4 inches | 3.5 inches | 5 inches | 3.38 inches |
| Width | 5.9 inches | 5.9 inches | 5.5 inches | 6 inches | 5.9 inches |
| Depth | 5.5 inches | 5.5 inches | 5.9 inches | 11 inches | 5.51 inches |
| Weight | 8 lbs | 8.8 lbs | 3.5 lbs | 8 lbs | 6.6 lbs |
Front to back airflow suited our racks.
Stable DC power delivery.
Installed without issues.
Reliable PSU option.
Good performance.
The JPSU-850W-DC-AFO is an 850 W DC power supply designed for Juniper QFX5100-96S switches, delivering high-efficiency, PSU-side airflow cooling in a compact hot-swap form factor.
Yes. The JPSU-850W-DC-AFO is fully compatible with Juniper QFX5100-96S chassis, meeting all mechanical, electrical and thermal requirements for seamless integration.
It accepts a -40 to -72 V DC input range (nominal -48 V), ensuring stable operation in telecom and data-center environments.
PSU-side airflow directs intake and exhaust exclusively through the power-supply module, optimizing chassis cooling and reducing system hot spots for reliable operation.