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Micro ATX

A3 is a highly expandable Micro-ATX Mini Tower in a strategically compact frame with a modern, minimalistic design. The included slim, silent fan Mercury AM120S complements this small case and keeps your system cool.

  1. Sleek, Minimalistic Design
  2. Supports High-end Graphics Card
  3. Screwless Tempered Glass and Filter Panels
  4. Slim Silent ARGB Fan Mercury AM120S Included


Model A3
Model Number IW-CS-A3BLK-1AM120S
Colors Black
Case Type Micro-ATX Tower
Materials SECC, Tempered Glass, Aluminium, PC-ABS
M/B Compatibility Micro-ATX, Mini-ITX
Expansion Slots 4 x PCI-E
Maximum Compatibility VGA Card Length: 340 mm
CPU Heatsink Height: 162 mm
I/O Ports 1 x USB 3.2 Gen 2x2 Type-C
2 x USB 3.2 Gen 1
HD Audio Combo (CTIA – SPK/Mic)
Internal Drive Bays 2 x 3.5" / 2.5"
1 x 2.5"
Thermal Solution Compatibility

Air Cooling Fans:
Top: 2 x 120 mm
Rear: 1 x 120 mm
Bottom: 2 x 120 mm
(1 InWin Mercury AM120S Fan Included)

Water Cooling Radiator:
Top: 1 x 240 mm

Power Supply Compatibility PSII: ATX12V
- Length between 140 - 200 mm
(PSUs longer than 170 mm will need to build with GPUs 280 mm or shorter)
Product Dimensions
(L x W x H)
401 x 215 x 347 mm
15.8 x 8.5 x 13.7"
Package Dimensions
(L x W x H)
473 x 277 x 422 mm
18.6 x 10.9 x 16.6"
Net Weight 5.24 kg / 11.55 lbs
Gross Weight 6.25 kg / 13.78 lbs
* Number of fans pre-installed may vary based on different regions.
* InWin's products comply with RoHS regulation.
* Specifications may vary based on different regions.
Model Mercury AM120S
Quantity Included Single Pack
Model Number IW-FN-AM120S-1PK
Colors Black
Fan Size 120 x 120 x 20 mm
Materials PBT, PC
Rated Voltage DC 12V
Rated Power 1.8W
Rated Current 0.15A
ARGB Rated Voltage DC 5V
ARGB Rated Power 1.4W
ARGB Rated Current 0.28A
Speed Mode PWM 400 - 2000 +/- 10% RPM
Air Flow 60.71 CFM
Air Pressure 2.72 mm / H2O
LED Addressable RGB
Connector (Fan to Fan) Non-Modular Cables
Connector to M/B 4-Pin (12V, PWM), 3-Pin (5V, ARGB)
Noise Level 17 - 29 dB(A)
Bearing Type Long Lifespan Sleeve Bearing
MTBF >60,000 hrs.
Net Weight 138 g / 0.3 lbs
Gross Weight 184 g / 0.4 lbs
Package Dimension
(L x W x H)
165 x 125 x 25 mm
6.49 x 4.92 x 0.98"
Warranty 3 Years
* InWin’s products comply with RoHS regulations.
* Specifications may vary based on different regions.

Sleek, Minimalistic Design

The A3 features a pristinely clean front panel embellished with a silver InWin logo and a brushed golden aluminium sheet. Showcase your build through the tinted tempered glass window in a modern vibe.

Fit for High-end Graphics Card

Not only is it good looking, it is a small compact case that allows PC builders to assemble 3-slot high-end graphics card.

Powerful Cooling

The A3 allows air and water cooling solutions to keep your system fresh. The top and bottom feature ventilated filter panels to combat dust and heat.

Go Screwless!

The tempered glass, filter, and side panels are all screwless for easy access and cleaning.

Outstanding I/O

The A3 features one USB 3.2 Gen 2x2 Type-C port, two USB 3.2 Gen 1 Type-A ports for fast charging speeds and outstanding data transfer rates and a headset audio jack utilizing the international CTIA standard.

Slim Silent Fan Mercury AM120S

Pre-installed silent ARGB fan AM120S provides powerful cooling performance within a slim 20 mm frame.


A3 chassis x 1
Mercury AM120S Fan x 1
PSU Support Holder x 1
QR Code Card x 1
Accessories Bag x 1

Become a Fan of InWin’s Case Fans!

InWin's case fans are both aesthetically pleasing and practical. There are different series of case fans that meet different user requirements. Some of InWin’s fans are daisy-chainable and some are not. So, take a look and check out which InWin fans match your needs

InWin’s Fans Compatibility Note:
1. Do not chain up your fans with other fans in with different cables types.
2. ARGB fans and RGB fans are not compatible with each other.