COVID-19 INFORMATION: Our showroom is open for Click & Collect orders. Click here for details.

Phanteks Eclipse P400A Mid Tower Gaming Case

Phanteks continues its user friendly design chassis with the new Eclipse Series P400A.

CCL Code: CAS3736
Manufacturer Code: PH-EC400ATG_BK01
Manufacturer: Phanteks
Phanteks Eclipse P400A Mid Tower Gaming Case

Key Features:

  • PSU not included
  • 2 x 2.5", 2 x 3.5" HDD Bay(s)
  • Max MB Size: E-ATX
  • Tempered Glass


Sorry, this product has been discontinued. We have found some similar products below.

The Phanteks Eclipse P400A breathes performance with its full metal mesh front panel. Thanks to engineering improvements we have been able to create an Ultra-Fine Performance Mesh that brings the best possible performance while keeping dust from entering the system.

Strength & Performance

Full-Metal Mesh Front Panel

The single-piece front panel is made from an Ultra-Fine Steel Mesh. This mesh catches dust, adds structure and strength, and is part of the P400A's seamless design.

Improved Airflow

The P400A chassis has improved airflow to keep your system cool. The optimised High Air-flow Mesh Front Design offers maximum cooling performance.

Integrated 3-Speed Fan Controller

The built-in Fan Controller balances noise and performance with the push of a button. Choose the right speed for you: Full, Medium or Low.

Cooling Capacity

The Eclipse P400A has a range of possible fan and radiator locations up to 360mm for both 120mm and 140mm fans.

Storage Capacity

The P400A supports 3 x 3.5" HDDs and 2 x 2.5" SSDs out of the box with easy to use trays and vibration dampening. There is space for an additional four drives with the optional PH-HDDKT_02 brackets.


Internal Expansion Bays 2 x 2.5"
2 x 3.5"


Expansion Slots 7 x Full Height


USB Ports 2 x USB 3.0
Headphone Ports 1 x 3.5mm Jack
Microphone In Port 1 x 3.5mm Jack


Cooling System Front: Supports 3 x 120mm or 2 x 140mm fans (1 x 120mm fan included)
Top: Supports 2 x 120mm or 140mm fans
Rear: Supports 1 x 120mm fan (included)
Power Supply ATX Power Supply supported


Form Factor Mid Tower Case
Case Colour Black
Material Powder Coated Steel
Tempered Glass
Motherboard Compatibility E-ATX
Width 210 mm
Depth 470 mm
Height 465 mm
Weight 7 kg


Warranty 5 Years

Key Features

Firewire No
Main Colour Black
Case Type Tower
USB 3.0 Support Yes
Case Form Factor Mid Tower
Power Supply Included No
Optimised for Gaming
80Plus Rated No
PSU Form Factor ATX
Display Model in Showroom No
L.E.D Fan No LED
Internal 3.5" Bay 2
Internal 2.5" Bay 2
Micro-ATX Yes
Cooler Height 160 mm
Built-in Card Reader No
USB Type-C Support No
Front HDMI No
Side Panel Type Tempered Glass
GPU Length 420 mm
PSU Depth 270 mm
Front Audio Type Separate
Maximum Motherboard Size Supported E-ATX

Item Details

Manufacturer Phanteks
Manufacturer Code PH-EC400ATG_BK01
EAN 0886523301653
UPC 886523301653
Condition New

Warranty Information

Warranty 5 Years

Manufacturer Information

Manufacturer Phanteks
Manufacturer Code PH-EC400ATG_BK01

Do you have you a question about the Phanteks Eclipse P400A Mid Tower E-ATX Case in Black with Tempered Glass?

5 / 5 5 reviews


4 weeks ago

Absolutely amazing for 62


last month

Good case with plenty of cooling options. Space for a full length gfx card, acceptable cable management and works well with Asrock B550 motherboard. I dont understand why case manufacturers dont pre-install the io panel. You invariably use it, so why have a separate push in piece?


3 months ago

The price I bought it for was an absolute bargain. The case itself is very very good. Looks great. Great manual. Great airflow. Just very very good

Dave Johnson

4 months ago

A good budget option for a case where airflow is important. Build quality seems decent enough and there's plenty of room to work in along with lots of options for fan placement.


11 months ago

Great case, looks amazing. Lots of room for working on the inside, and the basement definitely helps hide the cables. Slight bit of flex on the front mesh, meaning that when you move it it sometimes bends inwards, but does snap out again. Would have also liked slightly more space behind the motherboard for cables, as the side panel is quite difficult to get back one once you've routed all of your cables. Overall, lovely case and would recommend.

PDF Datasheets and Manuals

Document File type File size
Manual pdf