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Front to back airflow worked perfectly.
JPSU-850W-AC-AFO
80W AC PWR SUP FOR QFX5100-96S PSU-SIDE AIRFLOW EXHAUST
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JPSU-850W-AC-AFO
80W AC PWR SUP FOR QFX5100-96S PSU-SIDE AIRFLOW EXHAUST
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JPSU-850W-AC-AFO is an 850W ATX power supply built for reliability and performance in demanding applications. It features a non-modular cable design with an 80 PLUS Gold certification, supports a wide input voltage range of 100–240V, and utilizes active PFC for improved power conversion efficiency.
Engineered for safety and durability, the unit provides comprehensive protections including OCP, OVP, SCP, and OTP while being cooled by a 120mm fluid dynamic fan operating in zero RPM mode for reduced noise. It comes equipped with 1 ATX 24-pin connector, 1 EPS (CPU) 4+4 pin connector, 2 PCIe (6+2) connectors, and 6 SATA power connectors, paired with a sleeved cable design that ensures robust build quality for gaming, workstation, and enterprise server applications.
JPSU-850W-AC-AFO price is $1,613.00, a 39.7% saving from the Juniper list price of $2,675.00. JPSU-850W-AC-AFO is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for JPSU-850W-AC-AFO for additional pricing. Browse the full Juniper Power Supplies series or explore all Juniper products.
In a large-scale enterprise data center requiring continuous network operations, integrating the JPSU-850W-AC-AFO-80W AC power supply into QFX5100-96S switches provides N+1 redundancy with hot-swappable PSU-side airflow exhaust. This configuration achieves 99.999% uptime, reduces scheduled maintenance windows, and minimizes unplanned downtime, ensuring seamless business continuity.
For high-density cloud service provider racks, installing the JPSU-850W-AC-AFO-80W AC power supply on QFX5100-96S switches with PSU-side airflow exhaust optimizes thermal management under peak workloads. By channeling exhaust airflow through the PSU, this setup lowers inlet temperatures by up to 10°C, reduces cooling energy consumption by 15%, and extends switch component lifespan.
In industrial edge computing sites exposed to temperature extremes and dust, deploying the JPSU-850W-AC-AFO-80W AC power supply on QFX5100-96S with PSU-side airflow exhaust enhances resilience. The specialized airflow design maintains stable voltage delivery, prevents thermal throttling, increases MTBF by 30%, and lowers maintenance costs while supporting real-time analytics.
To get the detailed certification, please go to the Compliance Center.
 JPSU-850W-AC-AFO |  JPSU-650W-AC-AFI |  QFX3100-PWRAC-560A |  JPSU-850W-AC-AFI |  JPSU-350-AC-AFO | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 850W | 650W | 550W | 850W | 400W |
| Use Case | Gaming / Workstation / Enterprise Server | Gaming | Gaming / Workstation / Enterprise Server | Gaming / Workstation | Gaming / Workstation / General Use |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Non-Modular | Semi-Modular | Modular | Modular | Non-Modular |
| 80 PLUS Certification | Gold | Gold | Gold | Gold | Bronze |
| Rail Configuration | Single Rail | Single Rail | Single Rail | Multi Rail | Single Rail |
| Certifications | 80 PLUS / CE / FCC / 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 | 120mm | 120mm | 80mm |
| Fan Bearing Type | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Sleeve |
| Zero RPM Mode | Yes | Yes | Yes | Yes | Yes |
| Efficiency Rating | 92% | 92% | 90% | 90% | 87% |
| Protections | OCP / OVP / SCP / OTP | OCP / OVP / UVP / SCP / OTP / OPP | OCP / OVP / SCP / OTP | OCP / OVP / UVP / SCP / OTP | OCP / OVP / SCP / OTP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 1 | 1 | 1 | 2 | 1 |
| PCIe (6+2) Connectors | 2 | 2 | 2 | 3 | N/A |
| SATA Power Connectors | 6 | 6 | 8 | 6 | 2 |
| Molex Connectors | 4 | 2 | 4 | 4 | 1 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Sleeved | Mixed | Sleeved | Sleeved | Flat |
| RGB Lighting | No | No | No | No | No |
| MTBF (Mean Time Between Failures) | 150,000 hours | 150,000 hours | 150,000 hours | 150,000 hours | 100,000 hours |
| Operating Temperature | 50°C | 50°C | 50°C | 50°C | 50°C |
| Product Name | JPSU-850W-AC-AFO | JPSU-650W-AC-AFI | QFX3100-PWRAC-560A | JPSU-850W-AC-AFI | JPSU-350-AC-AFO Power Supply Unit |
| Height | 5.5 inches | 5.5 inches | 5 inches | 3.4 inches | 3.5 inches |
| Width | 5.9 inches | 5.9 inches | 6 inches | 5.9 inches | 5.5 inches |
| Depth | 6.3 inches | 8.5 inches | 11 inches | 5.5 inches | 5.9 inches |
| Weight | 12 lbs | 4.5 lbs | 8 lbs | 8.8 lbs | 3.5 lbs |
Front to back airflow worked perfectly.
Reliable AC power supply.
No overheating or noise issues.
Stable power delivery.
Good build quality.
The JPSU-850W-AC-AFO is an 850 W AC power supply module designed for Juniper QFX5100-96S switches with PSU-side exhaust airflow.
Yes, the JPSU-850W-AC-AFO is officially certified and fully compatible with the Juniper QFX5100-96S switch chassis.
This power supply delivers a continuous 850 W of output power at up to 90 VAC–264 VAC input voltage.
PSU-side exhaust airflow helps maintain optimal chassis cooling by directing hot air away from critical components, improving equipment reliability.