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CiT S503 Desktop Case - Black

CiT S503 Desktop Case - Black

CCL Code: CAS2667

£34.99 inc VAT

  • CiT S503 Desktop Case - Black
  • CiT S503 Desktop Case - Black
  • CiT S503 Desktop Case - Black
  • CiT S503 Desktop Case - Black
  • CiT S503 Desktop Case - Black
  • CiT S503 Desktop Case - Black

Get 5% off when you buy 5 or more different components using code: BUY5GET5

Get 5% off this item using code: CASE5OFF

CiT S503 Desktop Case - Black


£34.99 inc VAT

Available for delivery from Saturday 9th December

Hurry, only 1 left!

Buying in bulk? Contact our business team.

Key Features:

  • PSU not included
  • 1 x 5.25" External Bay(s)
  • 1 x 2.5" Drive(s) Max
  • 1 x 3.5" Drive(s) Max
  • Max MB Size: Micro-ATX

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CCL Code: CAS2667

The CIT S503 slim desktop case is notably strong for its modest size, creating the perfect case for System Integrators. The CIT S503 features a full tool-less design, with 2 x USB 2.0 and 2 x USB 3.0 and a quick release ODD/HDD housing system for fast installation with minimal effort. The included base allows for vertical installation of the S503, the CIT S503 supports Micro ATX or Mini ATX form factor motherboards and with its low profile body and sleek styling, the S503 blends seamlessly into any environment as a silent PC, versatile Home Theater PC or a powerful workstation.


  • Max PSU length: 174mm

Case Specifications

  • Form Factor: Desktop, Micro ATX
  • Motherboard Support: Micro ATX, Mini ITX
  • PSU Support: Flex
  • PSU Location: Top
  • Gaming Case: No
  • Water Cooling: Not Water Cooling Ready
  • Body Material: 0.6mm SGCC
  • Front Bezel Material: Plastic
  • Side Panel: Blank
  • External Bays: 1 x 5.25” External, 1 x 3.5” External
  • Internal Bays: 1 x 3.5” Internal, 1 x 2.5” Internal
  • Expansion Slots: 4 x Half-Height
  • Cooling Front: Space for 1 x 80mm fan (inc.)
  • Cooling Top: None
  • Cooling Rear: None
  • Cooling Side: None
  • Cooling Bottom: None
  • IO Ports: 2 x USB 3.0, 2 x USB 2.0, 1 x HD Audio, 1 x Microphone
  • GPU Max Length: 190mm
  • CPU Cooler Maximum Height: 82mm
  • Front Bezel Colour: Black/Grey
  • Body Colour: Black
  • PSU Included: No

General Specifications

  • Manufacturer Part Number: CITS503
  • EAN Number: 5055492404510
  • Has Mains Plug: No
  • Colour: Black
  • What's In The Box: Case, Screws, Manual, ODD mounting bracket, 3.5" mounting bracket
  • Unit (Product) Dimensions (mm): 332mm x 101mm x 380mm (W x H x D)
  • Packaging Dimensions (mm): 410mm x 468mm x 181mm (W x H x D)
  • Net Weight (KGs): 3.1 KGs
  • Gross Weight (KGs): 3.4 KG

Main Features

  • Full tool-less designed chassis
  • Ultra thin desktop micro ATX case, supports various micro M/B
  • Put both vertical or horizontal
  • Quick release side panel
  • Pad lock, Kensington lock, Alarm Switch optional


Get 5% off components when you buy 5 or more*

For a limited time, buy at least 5 different components from different qualifying categories and get 5% off those items at checkout.

 *Terms & Conditions apply.




Promotional Period: From 2023-09-25 till stocks last.

Terms and Conditions

It can't be combined with any other offer. UK residents only. Offer available on products in qualifying categories. Discount will apply to five or more items bought from separate categories (e.g. one CPU, one motherboard) in one basket. If will not apply to multiples from categories (e.g. two CPUs). Discount will be applied to the five or more items in your basket - please double-check your basket to ensure the offer applies correctly. Offer does NOT apply to systems that have such components. CCL reserve the right to end this offer at any time. Offer may not be substituted, exchanged, sold, or redeemed for cash or other goods or services. Offer only available on orders placed on - offer is not available via telephone or our eBay or Amazon stores.

Promotional Period: From 25th of September, 2023 till 9th of October, 2023.


*For a limited time, purchase a qualifying case and you can get 5% off this item by using code "CASE5OFF" in the basket.

Terms & Conditions apply.


Promotional Period: From September 7th, 2023, till stocks last.

Terms and Conditions

Offer available on qualifying cases Offer is not valid on systems containing a qualifying case. You must have an account and be logged in in order to use a discount code. Offer may not be substituted, exchanged, sold, or redeemed for cash or other goods or services. This code is an exclusive discount and cannot be mixed with other discounts or promotions. Offer is available on orders placed on - offer is not valid on orders placed via telephone or our eBay or Amazon stores.



External Expansion Bays 1 x 3.5 inch • 1 x 5.25 inch
Internal Expansion Bays 1 x 2.5 inch • 1 x 3.5 inch


Expansion Slots 4


USB Ports 2 x USB 2.0 • 2 x USB 3.0
Microphone In Port 1


Cooling System Cooling Front: Space for 1 x 80mm fan (inc.)


Form Factor Desktop Case
Case Colour Black
Motherboard Compatibility Micro ATX • Mini ITX
In The Box Case • Screws • Manual • ODD mounting bracket • 3.5 inch mounting bracket

Key Features

Firewire No
Max Motherboard Width 244 mm
Max Motherboard Height 244 mm
Main Colour Black
Case Type Desktop
USB 3.0 Support Yes
Case Form Factor Desktop
Power Supply Included No
Optimised for Home
80Plus Rated No
PSU Form Factor TFX
Display Model in Showroom No
L.E.D Fan No LED
Max 3.5" Drives 1
External 5.25" Bay 1
Max 2.5" Drives 1
Micro-ATX Yes
Cooler Height 82 mm
Built-in Card Reader No
USB Type-C Support No
Front HDMI No
Side Panel Type Solid
GPU Length 190 mm
PSU Depth 174 mm
Front Audio Type Separate
Maximum Motherboard Size Supported Micro-ATX
Total 2.5" + 3.5" drive bays 2
Power Requirement (auto) 3 W
USB2.0 ports 2
USB3.0 ports 2
Low profile expansion Yes


Warranty 1 Year

Item Details

Manufacturer CiT
Manufacturer Code CITS503
EAN 5055492404510
Condition New

Warranty Information

Warranty 1 Year

Manufacturer Information

Manufacturer CiT
Manufacturer Code CITS503

Do you have you a question about the CiT S503 Micro ATX Desktop Case?

Q: What is the maximum size mb this case will fit?
Post Answer
Q: The 'Specification' page says this will fit an ATX PSU. Is this true?
Answer by Website User on 5th March 2020
The listing was incorrect and has now been corrected. - Kristian N
0 customers found this answer helpful.
Post Answer
Q: CiT S503 Desktop Black Case - what psu fits this case ?
Answer by Website User on 16th February 2018
This fits a FLEX form factor PSU but we do not sell these.
1 customer found this answer helpful.
Answer by kevin on 31st March 2018
This is not true. i purchased a flex psu based on this info and it is far too small. You need a TFX psu.
5 customers found this answer helpful.
Answer by Website User on 27th August 2021
I used GameMax GT-300W 300W 80+ Bronze PSU
0 customers found this answer helpful.
Post Answer
No reviews have been received for this product yet

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