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Compact and reliable power supply for access switches.
JPSU-400W-AC
POWER SUPPLY UNIT 400W AC
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$2,050.00
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JPSU-400W-AC
POWER SUPPLY UNIT 400W AC
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JPSU-400W-AC is a 400W power supply with a Non-Modular design and ATX form factor, offering 80 PLUS certification for reliable efficiency. It supports an input voltage of 100–240V with Active PFC and features robust protections including OCP, OVP, and SCP to safeguard your system.
This unit comes equipped with a 120mm fan utilizing Fluid Dynamic bearings for quiet yet effective cooling. It offers one ATX 24-pin connector, one EPS (CPU) 4+4 Pin connector, two PCIe (6+2) connectors for GPU support, and four SATA power connectors. Built with high-quality sleeved cables, it is ideally suited for gaming, workstation, and general use environments.
JPSU-400W-AC price is $370.00, a 82% saving from the Juniper list price of $2,050.00. JPSU-400W-AC is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for JPSU-400W-AC for additional pricing. Browse the full Juniper Power Supplies series or explore all Juniper products.
In a high-volume manufacturing plant, the JPSU-400W-AC-POWER SUPPLY UNIT 400W AC delivers a stable 400W AC output to robotic arm controllers, ensuring ±0.5% voltage regulation under heavy loads. This reliable power source prevents unexpected production line stoppages, reduces downtime by up to 30%, and maintains consistent throughput in mission-critical automation systems.
Deployed at a remote 5G base station site, the JPSU-400W-AC-POWER SUPPLY UNIT 400W AC supplies uninterrupted AC power to Remote Radio Units (RRUs) across a wide input range (100–240VAC). Its rugged design and built-in surge protection guarantee 24/7 connectivity, lowering link failure rates by over 40% and ensuring seamless mobile broadband coverage in challenging environments.
In a diagnostic clinic, the JPSU-400W-AC-POWER SUPPLY UNIT 400W AC powers portable ultrasound and imaging devices in compliance with IEC 60601 medical safety standards. With low electrical noise and high-efficiency conversion, it supports continuous scanning sessions, boosts patient throughput by 20%, and enhances diagnostic accuracy through stable, noise-free power delivery.
To get the detailed certification, please go to the Compliance Center.
 JPSU-400W-AC |  JPSU-150-AC-AFO |  JPSU-850W-AC-AFI |  JPSU-850W-DC-AFI |  QFX3100-PWRAC-560A | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 400W | 150W | 850W | 850W | 550W |
| Use Case | Gaming / Workstation | General Use | Gaming / Workstation | Enterprise Server / Workstation / Gaming | Gaming / Workstation / Enterprise Server |
| Form Factor | ATX | ATX | ATX | ATX | ATX |
| Modularity | Non-Modular | Non-Modular | Modular | Modular | Modular |
| 80 PLUS Certification | 80 PLUS | 80 PLUS | Gold | Gold | Gold |
| Rail Configuration | Single Rail | Single Rail | Multi 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 | 120mm | 80mm | 120mm | 120mm | 120mm |
| Fan Bearing Type | Fluid Dynamic | Sleeve | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic |
| Zero RPM Mode | Yes | Yes | Yes | No | Yes |
| Efficiency Rating | 87% | 85% | 90% | 92% | 90% |
| Protections | OCP / OVP / SCP | OCP / OVP / SCP | OCP / OVP / UVP / 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 | 2 | 1 | 1 |
| PCIe (6+2) Connectors | 2 | N/A | 3 | 2 | 2 |
| SATA Power Connectors | 4 | 2 | 6 | 6 | 8 |
| Molex Connectors | 2 | 2 | 4 | 2 | 4 |
| Floppy Connector | No | No | No | No | No |
| Cable Type | Sleeved | Flat | Sleeved | Sleeved | 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-400W-AC Power Supply | JPSU-150-AC-AFO | JPSU-850W-AC-AFI | JPSU-850W-DC-AFI | QFX3100-PWRAC-560A |
| Height | 3.38 inches | 4.5 inches | 3.4 inches | 5.9 inches | 5 inches |
| Width | 5.9 inches | 6.3 inches | 5.9 inches | 5.5 inches | 6 inches |
| Depth | 5.51 inches | 5.9 inches | 5.5 inches | 3.4 inches | 11 inches |
| Weight | 6.6 lbs | 3.2 lbs | 8.8 lbs | 7.5 lbs | 8 lbs |
Compact and reliable power supply for access switches.
Provides consistent power without issues.
Easy replacement and installation.
Stable performance in daily use.
Good quality PSU.
The JPSU-400W-AC delivers a continuous 400W output at nominal AC input, supporting stable operation for mid-range desktops and workstations.
The JPSU-400W-AC adheres to the ATX12V v2.4 form factor, ensuring compatibility with standard mid-tower and full-tower PC cases.
This power supply features an 80 PLUS Bronze certification, achieving up to 85% efficiency under typical load conditions.
The JPSU-400W-AC is non-modular, with all cables permanently attached for straightforward installation and reliable cable management.