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Front to back airflow matched our switch design.
JPSU-350-AC-AFO
350W AC PWR SUP FRONT TO BACK AIRFLOW FOR EX4300
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JPSU-350-AC-AFO
350W AC PWR SUP FRONT TO BACK AIRFLOW FOR EX4300
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JPSU-350-AC-AFO is a 400W power supply designed with robust build quality and reliability in mind. Engineered in the ATX form factor and backed by an 80 PLUS Bronze certification, it delivers powerful performance on an input voltage of 100–240V with Active PFC for efficient power conversion.
Built as a non-modular unit, the JPSU-350-AC-AFO features an 80mm fan with a sleeve bearing that ensures effective cooling while maintaining low noise levels. It comes equipped with comprehensive protections—including OCP, OVP, SCP, and OTP—and offers a variety of connectors such as one ATX 24-pin, one EPS 4+4 pin, and two SATA power outputs, making it ideally suited for gaming, workstation, and general use systems.
JPSU-350-AC-AFO price is $125.20, a 75% saving from the Juniper list price of $500.76. JPSU-350-AC-AFO is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for JPSU-350-AC-AFO for additional pricing. Browse the full Juniper Power Supplies series or explore all Juniper products.
A global financial services firm deploys the JPSU-350-AC-AFO-350W AC PWR SUP in EX4300 core switches to achieve N+1 power redundancy and front-to-back airflow alignment in its primary data center. Outcome: 350W efficient power delivery, seamless failover and consistent cooling ensure 99.999% network uptime and simplified maintenance.
A multi-campus university standardizes on EX4300 switches with JPSU-350-AC-AFO-350W AC PWR SUP to enforce front-to-back airflow in hot-aisle/cold-aisle branch closets. Outcome: 15% reduction in power usage effectiveness (PUE), uniform cooling across 10 sites and streamlined PSU replacement protocols.
A colocation provider outfits high-density racks of EX4300 switches with JPSU-350-AC-AFO-350W AC PWR SUP to optimize thermal performance and power efficiency at scale. Outcome: 20% higher rack density, 10% lower cooling costs and reliable front-to-back airflow under peak load.
To get the detailed certification, please go to the Compliance Center.
 JPSU-350-AC-AFO |  JPSU-150-AC-AFO |  QFX3100-PWRAC-560A |  JPSU-650W-AC-AFI |  JPSU-850W-DC-AFI | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 400W | 150W | 550W | 650W | 850W |
| Use Case | Gaming / Workstation / General Use | General Use | Gaming / Workstation / Enterprise Server | Gaming | Enterprise Server / Workstation / Gaming |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Non-Modular | Non-Modular | Modular | Semi-Modular | Modular |
| 80 PLUS Certification | Bronze | 80 PLUS | Gold | Gold | Gold |
| Rail Configuration | Single Rail | Single 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 | 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 | 80mm | 80mm | 120mm | 120mm | 120mm |
| Fan Bearing Type | Sleeve | Sleeve | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic |
| Zero RPM Mode | Yes | Yes | Yes | Yes | No |
| Efficiency Rating | 87% | 85% | 90% | 92% | 92% |
| Protections | OCP / OVP / SCP / OTP | OCP / OVP / SCP | OCP / OVP / SCP / OTP | OCP / OVP / UVP / SCP / OTP / OPP | OCP, OVP, UVP, SCP, OTP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 1 | 1 | 1 | 1 | 1 |
| PCIe (6+2) Connectors | N/A | N/A | 2 | 2 | 2 |
| SATA Power Connectors | 2 | 2 | 8 | 6 | 6 |
| Molex Connectors | 1 | 2 | 4 | 2 | 2 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Flat | Flat | Sleeved | Mixed | Sleeved |
| RGB Lighting | No | No | No | No | No |
| MTBF (Mean Time Between Failures) | 100,000 hours | 100,000 hours | 150,000 hours | 150,000 hours | 150,000 hours |
| Operating Temperature | 50°C | 40°C | 50°C | 50°C | 50°C |
| Product Name | JPSU-350-AC-AFO Power Supply Unit | JPSU-150-AC-AFO | QFX3100-PWRAC-560A | JPSU-650W-AC-AFI | JPSU-850W-DC-AFI |
| Height | 3.5 inches | 4.5 inches | 5 inches | 5.5 inches | 5.9 inches |
| Width | 5.5 inches | 6.3 inches | 6 inches | 5.9 inches | 5.5 inches |
| Depth | 5.9 inches | 5.9 inches | 11 inches | 8.5 inches | 3.4 inches |
| Weight | 3.5 lbs | 3.2 lbs | 8 lbs | 4.5 lbs | 7.5 lbs |
Front to back airflow matched our switch design.
Stable power delivery since deployment.
Easy to install and replace.
Reliable PSU for EX series.
Meets expectations.
The JPSU-350-AC-AFO is a 350 W AC power supply module with front-to-back airflow, engineered for Juniper EX4300 series switches.
This power supply is fully compatible with all Juniper EX4300 models, including EX4300-24T, EX4300-48P, and Virtual Chassis configurations.
The JPSU-350-AC-AFO provides front-to-back airflow to ensure optimal cooling within the EX4300 chassis.
It accepts 100–240 VAC at 50–60 Hz, enabling global deployment without manual voltage switching.