United States$5,000,000+
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Trevor Miles
5
Low wattage supply worked well for light loads.
J9739A
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HP X331 165W 100-240VAC to 12VDC PS
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Name:
J9739A
- Description:
- HP X331 165W 100-240VAC to 12VDC PS
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- Hpe
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J9739A Overview
J9739A is a 750W power supply that delivers reliable performance with a semi-modular design and an ATX form factor. Featuring an 80 PLUS Gold certification and operating within a 100–240V input range with Active PFC, this unit is engineered for efficient power delivery. It incorporates a 120mm fan with a Fluid Dynamic bearing for quiet and effective cooling, and it comes equipped with essential protections including OCP, OVP, SCP, and OTP.
Built for high-demand environments, J9739A offers a robust configuration with one ATX 24-pin connector, one EPS (CPU) 4+4 pin, two PCIe (6+2) connectors, four SATA power connectors, and two Molex connectors. With a 92% efficiency rating and sleeved cables ensuring enhanced durability, its superior build quality results in low noise levels, making it ideally suited for gaming systems and other performance-driven workstations.
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J9739A Specifications
- Product Type
- Power Supply
- Wattage
- 750W
- Use Case
- Gaming
- Form Factor
- ATX
- Modularity
- Semi-Modular
- 80 PLUS Certification
- Gold
- Rail Configuration
- Single Rail
- Certifications
- 80 PLUS / CE / FCC / UL / CB / RoHS
- Remote Monitoring
- No
- 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
- 92%
- Protections
- OCP / OVP / SCP / OTP
- ATX 24-Pin Connectors
- 1
- EPS (CPU) 4+4 Pin
- 1
- PCIe (6+2) Connectors
- 2
- SATA Power Connectors
- 4
- Molex Connectors
- 2
- Floppy Connector
- No
- Cable Type
- Sleeved
- RGB Lighting
- No
- MTBF (Mean Time Between Failures)
- 150,000 hours
- Operating Temperature
- 50°C
- Product Name
- J9739A High Performance 750W Semi-Modular Gaming Power Supply
- Height
- 5 inches
- Width
- 6 inches
- Depth
- 5.5 inches
- Weight
- 4 lbs
J9739A Use Case
Enterprise Data Center Network Redundancy with J9739A-HP X331 165W 100-240VAC to 12VDC Power Supply
In critical data center environments, the J9739A-HP X331 delivers 165W of stable 12VDC power from 100–240VAC for high-density switches and routers. Its universal AC input and redundant OR-ing capability ensure seamless failover, maximising network uptime and meeting stringent SLAs.
Industrial Automation and PLC Power Management Using J9739A-HP X331 165W 100-240VAC to 12VDC PS
Manufacturing lines rely on the J9739A-HP X331 to supply 165W of precise 12VDC power to PLCs, HMIs and servo drives. Featuring a wide input range, advanced EMI filtering and high efficiency, it safeguards production continuity, minimises downtime and streamlines global deployment under harsh conditions.
Telecom & Remote Wireless Site Backup with J9739A-HP X331 165W 100-240VAC to 12VDC Power Supply
The J9739A-HP X331 supports remote cellular base stations, small-cell access points and satellite terminals with 165W of reliable 12VDC from 100–240VAC. Its compact form factor, high efficiency and universal AC input reduce OPEX, accelerate field installation and maintain uninterrupted connectivity in remote locations.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| J9739A |  798101-B21 |  828735-B21 |  784582-B21 |  867876-B21 | |
|---|---|---|---|---|---|
| Product Type | Power Supply | Power Supply | Power Supply | Power Supply | Power Supply |
| Wattage | 750W | 850W | 850W | 750W | 1500W |
| Use Case | Gaming | Gaming / Workstation | Gaming | Gaming / Workstation | Gaming |
| 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 | Multi Rail | Multi Rail | Single Rail | Single Rail |
| Certifications | 80 PLUS / CE / FCC / UL / CB / RoHS | 80 PLUS / CE / FCC / UL / CB / TUV / 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 | 110–240V | 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 | 135mm | 140mm |
| Fan Bearing Type | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic | Fluid Dynamic |
| Zero RPM Mode | Yes | Yes | Yes | Yes | Yes |
| Efficiency Rating | 92% | 92% | 90% | 94% | 92% |
| Protections | OCP / OVP / SCP / OTP | OCP / OVP / SCP / OTP | OCP / OVP / UVP / SCP / OTP / OPP | OCP / OVP / SCP / OTP | OCP / OVP / UVP / SCP / OTP |
| ATX 24-Pin Connectors | 1 | 1 | 1 | 1 | 1 |
| EPS (CPU) 4+4 Pin | 1 | 1 | 2 | 1 | 2 |
| PCIe (6+2) Connectors | 2 | 2 | 4 | 2 | 4 |
| SATA Power Connectors | 4 | 6 | 8 | 6 | 8 |
| Molex Connectors | 2 | 3 | 4 | 4 | 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 | 50°C | 50°C | 55°C | 50°C |
| Product Name | J9739A High Performance 750W Semi-Modular Gaming Power Supply | 798101-B21 High Performance Modular ATX Power Supply | 828735-B21 High Performance ATX Power Supply | 784582-B21 High Performance Modular ATX Power Supply | 867876-B21 Ultra Performance Power Supply |
| Height | 5 inches | 5.5 inches | 5.5 | 3.38 inches | 5.5 inches |
| Width | 6 inches | 8.5 inches | 5.9 | 5.91 inches | 6.3 inches |
| Depth | 5.5 inches | 7.0 inches | 8.6 | 5.51 inches | 11 inches |
| Weight | 4 lbs | 4.8 lbs | 7 lbs | 6.6 lbs | 4.8 lbs |
Reviews & Ratings
H
Haseeb Anwar
5
Compact and efficient.
G
Gareth Owens
4
Easy to deploy.
N
Nils Bergstrom
5
Reliable operation.
A
Adam Cole
5
Met specifications.
Questions & Answers
What is the HP X331 165W 100-240VAC to 12VDC power supply (SKU: J9739A)?
The HP X331 (J9739A) is an external AC-DC adapter that converts 100-240VAC input to 12VDC output at 13.75A, delivering 165W of reliable power for HP networking devices.
Which HP devices are compatible with the J9739A 165W power supply?
The J9739A HP X331 165W power supply is compatible with HP 3800 series switches, HP 2920 and 1930 series switches, and other HP ProCurve network appliances requiring 12VDC, 165W.
What input voltage range does the HP X331 165W PSU support?
The HP X331 (J9739A) accepts a universal input voltage range of 100–240VAC at 50–60Hz, enabling seamless worldwide operation without manual voltage selection.
What are the output specifications of the HP X331 165W adapter?
The HP X331 (J9739A) provides a fixed 12VDC output at a maximum current of 13.75A for a total power delivery of 165W, ensuring stable operation under full load.
Is the HP J9739A hot-swappable in HP switch chassis?
Yes, the HP X331 165W power supply (J9739A) supports hot-swap capability in compatible HP switch chassis, allowing replacement without network downtime.
Does the HP X331 165W power supply include built-in protection features?
The HP X331 (J9739A) incorporates overload, overvoltage, short-circuit and thermal protection to guard your HP networking equipment against electrical faults.
What certifications does the HP J9739A power adapter have?
The HP X331 165W adapter (J9739A) is certified to UL, CE, FCC and RoHS standards and meets ENERGY STAR efficiency guidelines for reduced power consumption.
How do I install the HP X331 165W power supply?
To install, connect the AC power cord to the J9739A adapter, attach the 12VDC output plug firmly into the device’s power inlet, and switch on the network device.
Can I use the HP 165W PSU in different countries?
Yes, the HP X331 165W adapter auto-senses 100–240VAC, 50–60Hz input, making it suitable for global deployment with the appropriate local AC power cord.
What are the physical dimensions and weight of the HP X331 PSU?
The HP X331 (J9739A) measures 5.1 x 2.4 x 1.2 inches and weighs approximately 0.9 pounds, offering a compact footprint for rack or shelf installation.
How energy-efficient is the HP J9739A power supply?
The HP X331 165W PSU meets ENERGY STAR efficiency requirements with >90% typical efficiency, reducing operational costs and heat generation in network environments.
What warranty does the HP X331 165W adapter come with?
The HP X331 (SKU: J9739A) includes a standard one-year limited hardware warranty backed by HP support and replacement services.
Where can I purchase an authentic HP J9739A power supply?
You can purchase the genuine HP X331 165W power supply (J9739A) through HP authorized resellers, the official HP Store, or certified network hardware distributors.
How do I troubleshoot common issues with the HP X331 165W PSU?
Check secure AC/DC connections, verify outlet power, inspect for LED status indicators, and replace with a known-good adapter if no output is detected.
Is the HP J9739A adapter compatible with third-party power cords?
Yes, the HP X331 accepts standard IEC C13/C14 power cords rated for 100–240VAC, but HP’s approved cords ensure proper grounding and safety compliance.
What return policy applies to the HP X331 165W power supply?
HP-authorized sellers typically offer a 30-day return window for unused J9739A units, subject to original packaging and proof of purchase.