Jonsbo A4 is a premium tower-style SFF PC case launched in 2019. At 15.6L volume, it uses quality materials, and features great front IO and wide hardware compatibility: big GPU, tall CPU cooler, 240mm AIO radiator and SFX/SFX-L PSU. Now in version 1.1, it is a great option of compact PC case


Lead time: up to 1 week


Product warranty: 180 days





Improvements from v1.0 to v1.1:  Front IO (USB-C added), enhanced quality control, better accessories, increased warranty, and other small fixes



High quality: 1.5-3mm powder coated aluminum, 3mm tempered glass, made by Jonsbo

Small/Compact: Only 15.6L volume, tower-style, fits in most travel bags

Powerful: Supports the best available SFF hardware, low noise, great airflow

Flexible/Innovative: 3 colors to choose, many different hardware options

Widely tested: Thousands of units shipped worldwide, launched in 2019, multiple reviews available online

And more...



Version: 1.1

Dimension: 340mm(L) * 169mm(W) * 273mm(H)

Material: Top plate 3mm aluminum magnesium alloy

Front/back/bottom plate 2mm aluminum magnesium alloy

Hardware 1.5mm all black steel plate

Side plate 3mm all tempered glass

Motherboard: Mini ITX

Drive Bay: 2* 2.5” + 1* 3.5”

System Fan: Top: 2* 120mm (optional), Bottom: 2* 120mm (optional)

Max. CPU Cooler Height: 71mm

Radiator Support: Top 240x30mm

Max. Display Card Length: 325mm

Front I/O Port: 1* POWER, 1* USB3.1 Gen2 Type-C, 1* USB3.1 Gen1 Type-A

PCI Expansion Slot: 2

PSU Support: SFX/SFX-L

Colors: Black, Grey, Silver


Weight: ~5500g (12.1lb)


What's included: Chassis, ADT PCIe cable, internal power cable extender, front IO, screws, standoffs, case feet


If you need a good CPU cooler for this case, check our Cryorig C7 Plus

You can also find other cool SFF PC products at our Shop

Jonsbo A4 v1.1

Case color
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We've been absent since mid 2020, but will be back now with regular updates.

Z-CASES got discontinued from SFFTEC in early 2021. For that reason, related orders were being refused since then.
Website is now updated accordingly, with some other changes.

The few pending orders from 1st batch will be contacted in the next 6 weeks.
We deeply apologize again for the situation, more info will be provided soon. If any questions, email us at