400W ENT18 EPA92 Platinum Power Supply for HP 280 288 480 600 800 G3 G4

400W 80 PLUS Platinum internal power supply for compatible HP business and consumer desktop systems requiring the ENT18 EPA92 12V three-output architecture. This proprietary non-modular PSU includes a 7-position P2 connector with six populated wires, two 4-pin +12V connectors, and one 6+2-pin PCIe graphics-power connector. It is intended only for systems requiring the same enclosure, mounting points, wiring, connector layout, and cable lengths.

Technical Specifications

• Primary Part Number: 942332-001
• Manufacturer Model: PA-3401-1 / PA-3401-1 (HA)
• HP Assembly Reference: L29870-001
• Power Supply Family: 400W ENT18 EPA92
• Part Type: Internal desktop power supply
• Maximum Output Power: 400W
• Efficiency Rating: 80 PLUS Platinum
• Typical Efficiency at 50% Load: 92.84%
• Form Factor: Proprietary microtower / tower desktop PSU
• Dimensions: Approx. 95mm x 75mm x 167mm
• Dimensions in Inches: Approx. 3.74" x 2.95" x 6.57"
• AC Input Voltage: 100-240V~
• AC Input Current: 5.2A
• Input Frequency: 50-60Hz
• DC Output +12.1V Main: 16A
• DC Output +12.1V CPU: 16A
• DC Output +12.1V Graphics: 16A
• Maximum Combined Output: 400W
• P2 System Connector: 1x proprietary 7-position inline connector with six populated wires
• P2 Cable Length: Approx. 3.5"
• 4-Pin +12V Connectors: 2x 4-pin connectors
• 4-Pin Cable Lengths: Approx. 18" and 28.5"
• PCIe Graphics Connector: 1x 6+2-pin PCIe connector
• PCIe Cable Length: Approx. 16"
• Direct SATA Power Connectors: None
• Cable Design: Non-modular with permanently attached cables
• AC Power Inlet: IEC 60320 C14
• Required AC Cable: IEC C13 power cord
• Cooling: Integrated internal fan
• Installation Type: Internal chassis-mounted desktop power supply

The individual +12.1V rail limits must not be added together. Total combined power-supply output remains limited to 400W.

Interchangeable / Replacement Part Numbers

942332-001, L29870-001, PA-3401-1, PA-3401-1HA

PA-3401-1HA is also printed and marketed as PA-3401-1 (HA). These references identify the 400W ENT18 EPA92 version with the six-wire P2 connector and matching fixed cable set.

⭐ Recommended Accessory - C13 AC Power Cord

This power supply uses a standard IEC C14 AC inlet. Add the cable below if the original AC power cord is missing, damaged, or not included.

⭐ 5120P - 6FT 125V NEMA 5-15P to IEC C13 Power Cord - Grounded North American AC cable for connecting the power supply to a standard wall outlet. Sold separately.

✅ Confirmed Compatibility

Please note that different power-supply and P2 wiring revisions were used within these desktop families. This page applies only to systems requiring the exact 400W ENT18 EPA92 PA-3401-1 configuration with a six-wire 7-position P2 connector, two 4-pin connectors, one 6+2-pin PCIe connector, and matching dimensions and cable lengths.

✔️ HP 280 Pro Microtower: HP 280 Pro G3 MT, HP 280 Pro G4 MT configurations requiring the listed 400W power-supply family
✔️ HP 288 Pro Microtower: HP 288 Pro G3 MT, HP 288 Pro G4 MT configurations requiring the listed 400W power-supply family
✔️ HP ProDesk Microtower: ProDesk 480 G3 MT, ProDesk 480 G4 MT, ProDesk 600 G3 MT, ProDesk 600 G4 MT, ProDesk 600 G5 MT, ProDesk 680 G4 MT
✔️ HP EliteDesk Microtower and Tower: EliteDesk 705 G4 MT, EliteDesk 800 G3 Tower, EliteDesk 800 G4 Tower configurations requiring the same 400W ENT18 cable layout
✔️ HP Pavilion Desktop: Pavilion 590-p0000 series and Pavilion 595-p0000 series configurations using the matching Lincs or Sunflower motherboard power architecture
✔️ HP Pavilion Gaming Desktop: Pavilion Gaming 690-0000 series and Pavilion Gaming 790-0000 series configurations originally equipped with 942332-001 or PA-3401-1
✔️ HP ENVY Desktop: ENVY 795-0000 series configurations requiring the listed 400W ENT18 power supply and matching six-wire P2 connector

☑️ Key Features

☑️ 400W maximum output for compatible desktop systems
☑️ 80 PLUS Platinum efficiency certification
☑️ Compact 95mm x 75mm x 167mm proprietary enclosure
☑️ Six-wire 7-position P2 system-board connector
☑️ Two fixed 4-pin +12V power connectors
☑️ One 6+2-pin PCIe connector for compatible graphics cards
☑️ Wide-range 100-240V AC input
☑️ Three dedicated +12.1V output rails
☑️ Permanently attached non-modular cable set
☑️ Standard IEC C14 inlet accepts an IEC C13 AC power cord

⚙️ Fit Notes

✓ This is a proprietary power supply and does not use a standard 24-pin ATX motherboard connector.
✓ Confirm that the P2 connector has six populated wires. Do not substitute PA-3401-6HY or another version using a three-wire P2 connector, even if a marketplace listing associates it with 942332-001.
✓ Match the original part number, 95mm x 75mm x 167mm enclosure, mounting points, connector wiring, and all cable lengths before ordering.
✓ The PSU does not have direct SATA power connectors. Hard drives and optical drives receive power through separate system-board-connected drive cables.
✓ Later 400W CDT20 EPA90 supplies such as PA-3401-2HA and L76557-001 are not included in this exact interchangeable family because their dimensions, output ratings, and cable lengths differ.
✓ The single 6+2-pin PCIe connector does not make every graphics card compatible. Verify the card’s total power requirement, physical clearance, cooling needs, and system BIOS support.
✓ Do not assume compatibility with SFF, Desktop Mini, or All-in-One models based only on the 280/288/480/600/800 series name.
✓ The AC power cord is not included unless shown. Disconnect AC power and allow the system to discharge before replacing the PSU.