L75200-004 HP EliteDesk 800 Series 550W PSU with 92% efficiency

550W PSU for HP 280/ 282/ 285/ 288/ 400/ 480/ 600/ 800/ G3 G4 G5 G6 Power Supply HPN:L75200-004,PCK026,L75200-001

• Brand: HP
• Part #(s): 
• HP Part #: L75200-001,PA-5551-1HA, PCK026
• Manufacturer: Delta Electronics (Delta),Lite-On or Chicony
• Associated OEM model numbers frequently seen are:
• PA-5551-1HA (A common Lite-On model designation)
• PCK026
• DPS-500AB-51A (A Delta model designation)
• Specs:-
• ::Type: Power Supply Unit (PSU)
• ::Wattage: 550W (Watts)-Maximum Continuous Power
• ::80 PLUS Certification: Platinum (often listed as 92% Efficiency)
• ::Output Rating: +12V Rail Output-This high power on the +12V rail is what allows the PSU to support dedicated graphics cards for gaming or professional use
• Compatibility:-
• ::HP EliteDesk 800 Series (G3, G4, G5, G6 generations)
• ::HP ProDesk 600 Series (G3, G4, G5, G6 generations)
• ::HP Z2 Workstations (G4, G5, G6 generations)
• Condition: New
• Warranty: 1 (one) year Tekmart Africa warranty
•  

INT181225PHCN2025

**Eligible for immediate collection / shipping  upon order confirmation*

The SKU:L75200-004 is a part number pointing to an HP 550W Power Supply Unit (PSU).

It is a specific, OEM-equivalent power supply designed for various HP desktop and workstation models, particularly in the Mini Tower (MT) format.

They are primarily designed for and used in the Mini Tower (MT) or Tower (TWR) versions of the following professional HP series:

• HP EliteDesk 800 Series (G3, G4, G5, G6 generations)
• HP ProDesk 600 Series (G3, G4, G5, G6 generations)
• HP Z2 Workstations (G4, G5, G6 generations)
•  

These systems are favoured for this type of upgrade because the Tower chassis provides enough physical space for a larger power supply and a dedicated graphics card.

This option part is used when replacing a failed power supply or upgrading a lower-wattage unit in these above compatible systems.

You will need to use these power supplies in two main scenarios, both related to specific lines of HP desktop computers and workstations.

1.  Replacement/Repair of a Failed PSU

The most common situation is using it as a direct, OEM-equivalent replacement for a failed power supply in a compatible HP desktop model.

• ::Use case: The original PSU (often a 400W or 500W unit) in the computer has stopped working, is making loud noises, or is causing the system to experience random shutdowns due to unstable voltage.

• ::Solution: You purchase one of these and install because they are specifically designed to fit the proprietary chassis, cooling setup, and motherboard connectors (including the unique 4-pin/7-pin power/ID connectors) of these HP systems.

•  

2. Performance Upgrade (Adding a Graphics Card)

This 550W unit is frequently used as an upgrade path when a user wants to install a more powerful component, particularly a dedicated graphics card, into their HP desktop that was originally shipped with a lower wattage PSU (e.g., 250W, 310W, or 400W).

• ::Use Case: You own an HP ProDesk or EliteDesk desktop and wants to use it for gaming, video editing, or CAD work by adding a mid-range dedicated graphics card (like an NVIDIA GeForce RTX 3060, RTX 4060, or equivalent).

• ::Reason: Most mid-to-high-end graphics cards require more power than the standard 250W or 400W PSUs can reliably deliver, and they often require a PCIe power connector (6-pin or 8-pin) which the low-wattage OEM PSUs lack.

• ::Solution: You will install one of these to provide the necessary 550W of power and the required supplemental PCIe power connectors to safely run the new graphics card and other components under heavy load.

•  

While the L75200-004 is the HP spare part number, the power supply itself often has an internal manufacturer model number printed on its label. 

The 80 PLUS Platinum rating signifies that the power supply is extremely efficient.

At a standard 115V input, it must achieve: