Description
The Kontron K4021-U mSTX is an upcoming industrial motherboard based on the latest Intel® Core™ Ultra processors, featuring powerful graphics driven by the Intel® Xe architecture. This board introduces a new integrated Neural Processing Unit (NPU) for dedicated AI acceleration, delivering a significant performance-per-watt improvement. It offers exceptional display capabilities, supporting up to four independent 4K displays or two 8K displays through a combination of DisplayPorts, USB-C with Thunderbolt 4, embedded DisplayPort, and LVDS. With four M.2 connectors and a rich set of I/O, the K4021-U is designed for 24/7 continuous operation in an enhanced temperature range up to 60°C, making it a forward-looking solution for various demanding vertical markets.
Key Features
- Based on the latest Intel® Core™ Ultra processors
- Latest DDR5 memory technology for best-in-class system performance
- Powerful Intel® Graphics driven by Intel® Xe architecture
- Supports up to four 4K60 HDR displays or two 8K displays with Thunderbolt 4
- Onboard support for Dual Channel LVDS (24 Bit) and eDP V1.4b (4K)
- New integrated NPU for dedicated AI acceleration
- Designed for 24/7 continuous operation up to 60°C
Specification
|
Processor |
Intel® Core™ Ultra 7 155U |
| Intel® Core™ Ultra 5 125U | |
|
Chipset |
Intel® Meteor Lake U SoC |
|
Main Memory |
DDR5 5600 SDRAM |
| 2x SO DIMM socket, up to 96 GByte memory, non-ECC | |
|
Graphics Controller |
Intel® Graphics driven by Intel® Xe with up to 8 Xe-cores |
|
Display |
Up to 2x DP V1.4b up to 8K |
| 1x TB4 / USB4® DP2.1 up to UHBR20 8K | |
| 1x eDP V1.4b up to 8K, | |
| 1x Dual-Channel LVDS | |
| 1x USB-C with DPoC | |
|
Audio Controller |
1x Realtek RTL8126 |
| 1x Intel® i219LM | |
|
Audio |
Stereo, High Definition Audio Codec |
|
Ethernet |
Intel® i219LM with 10/100/1000 MBit/s, iAMT features |
| Realtek RTL8126 with 10/100/1000/2500/5000 MBit/s, TSN Support | |
|
USB |
1x USB-C 3.2 Gen2 + 1x USB-C with Thunderbolt 4/USB4® support |
| 1x USB 3.2 Gen2 Type-A + 2x USB 3.2 Gen1 Type-A | |
| 4x USB 2.0 (by headers) | |
|
Serial |
2x RS232 (by headers) |
|
Available I/Os |
8 Bit GPIO (by header); WLAN LED support, WLAN enable/disable support |
|
SATA |
2x Serial ATA III 600 Interface (up to 6GBit/s), NCQ, AHCI |
|
Expansion |
1x M.2 2230/2242/2280 (Key-M, PCIe x4/Gen4/NVMe SSD modules) |
| 1x M.2 2230/2242 (Key-M, PCIe x4/Gen4/NVME SSD modules) | |
| 1x M.2 2242 (Key-B PCIe x1/USB2) | |
| 1x M.2 2230 (Key-E, WLAN PCIe and CNVi support/Bluetooth USB modules) | |
|
Power connector |
External/Internal DC-In (DC Jack/4-Pin Micro-Fit) |
|
Input Voltage |
DC Input 12V or 19-28V |
|
BIOS |
AMI Aptio 5.x (UEFI) BIOS |
|
Watchdog |
BIOS POST-/BIOS BOOT-/OS-HW Watchdog |
|
Real Time Clock |
Integrated |
|
Cooling |
2x PWM fan (CPU/System) |
|
Operating System |
MS Windows 10, MS Windows 11, MS Windows 10 IoT, Linux-64 |
| No legacy OS support, no MBR installation (UEFI only) | |
|
Mechanical Dimensions |
Mini-STX: 5.5“ x 5.8“ (140 x 148 mm) |
|
Operating Temperature |
0°C-60°C |
|
Humidity |
5%-85% |
|
Certifications |
Planned: cTÜVus acc. IEC62368-1, CE Class B incl. Industrial Immunity, UKCA, FCC-B verified |
Kontron SMARTCASE Family
Alongside our Kontron industrial motherboard portfolio, we offer the compact and stylish SMARTCASE™ chassis range. Designed for demanding environments such as industrial and digital signage applications, SMARTCASE™ solutions are CE and FCC Class B certified for EMC compliance. This modular IPC chassis family is compact, flexible, and thermally approved for operation up to 45°C, supporting both horizontal and vertical installation.
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Key features include:
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Typical applications:
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👉 This is a selection of Kontron SMARTCASE’s. To find the right SMARTCASE™ solution for your application, speak to our sales team for expert advice and configuration options. If an off-the-shelf chassis does not fully meet your requirements, BVM can also design and develop a custom enclosure tailored to your application, environment, and performance needs.
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| SMARTCASE™ S720: Mini-ITX chassis | SMARTCASE™ S730: Mini-ITX chassis | SMARTCASE™ S501: Mini-STX chassis | SMARTCASE™ S502: Mini-STX chassis | SMARTCASE™ S511: Mini-STX chassis |

















