3.5” SubCompact Wide Temperature Embedded Motherboard with Intel® Atom® x5-E3940 Processor, Dual Channel DDR3L memory, 4 x COM , 1 x SATA 6Gb/s, 6 x USB, Temp -40°C to 85°C
  • 3.5’’ SBC
  • Intel® Atom® x5-E3940
  • Dual Channel DDR3L, 2 x SO-DIMMs
  • 2 x GbE LAN Ports
  • 1 x SATA 6Gb/s Port
  • M.2 with SATA 6Gb/s
  • HDMI, VGA, LVDS ports for multiple display
  • 1 x COM Port (RS-232/422/485 & RI/5V/12V)
  • 3 x COM Ports (RS-232)
  • Wide Temperature Embedded Motherboard

QBiP Wide Temperature Series are 3.5" SubCompact Boards designed for applications in harsh environment or extreme temperature conditions.  It supports two temperature ranges : -20°C to 70°C and -40°C to 85°C, with fan-less thermal solutioin, for different level of performance in various operating environments.
QBiP-E3940AT is equipped with Intel® Atom® x5-E3940 low power SoC with 9.5W TDPs, dual channel DDR3L memory up to 8G and rich I/O interfaces of 4 x COM Ports (1 x switchable and 3 x RS-232), 1 x GPIO (8 bits) and 6 x USB etc, for flexible functionality to fulfill versatile industrial requirements.  Furthermore, it provides great expansion with 2242 M.2 M-key slot to support SATA 6Gb/s
 SSD and SIM slot for cellular connection.  

Form Factor

3.5" SBC

146W x 101.7D(mm)


Intel® Atom® x5-E3940 Processor

14nm, 4 cores, 4 threads, up to 1.8 GHz

TDP 9.5W

2M Cache


1 x FCBGA 1296


2 x DDR3L SO-DIMM sockets, Max. Capacity 8 GB

Support Dual channel DDR3L 1866 MHz memory modules


2 x GbE LAN Ports (Intel® I211AT)


Integrated Graphics Processor - Intel® HD Graphics 500:

1 x HDMI 1.4 port, supporting a maximum resolution of 3840x2160 @30Hz

1 x VGA port, supporting a maximum resolution of 2560x1600 @60Hz (with compatible displays)

1 x LVDS port, supporting a maximum resolution of 1920x1080 @60Hz

(3 independent display outputs)


Realtek® Audio Codec


1 x SATA 6Gb/s Port

Expansion Slots

1 x 2242 M.2 M-Key (SATA 6Gb/s)

1 x Full-size Mini PCIe with SIM slot (PCIe x1 + USB2.0) -- support 3G module

Internal I/O

1 x 4-pin box power connector (+9V~36VDC)

1 x SATA Power header

1 x System fan header

1 x Front panel header

1 x 2W Speaker out header

4 x USB 2.0 headers

3 x COM headers (RS-232)

1 x COM header (RS-232/422/485 & RI/5V/12V)

1 x Backlight Control header

1 x AT/ATX mode select jumper

1 x GPIO (8-bits) & SMBUS header

1 x Buzzer header

Rear I/O

1 x Headphone Jack

1 x HDMI

1 x VGA

2 x RJ45 LAN Ports

2 x USB 3.2 Gen 1


1 x TPM header

OS Compatibility

Windows 10 (x64)

Operating Properties

Operating temperature: -40°C to 85°C

Operating humidity: 0-90% (non-condensing)

Non-operating temperature: -40°C to 85°C

Non-operating humidity: 0%-95% (non-condensing)

Packing Content Carton size: 375 x 324 x 293 (mm)
Packing Capacity: 10pcs

Single Box size: 256 x 175 x 59 (mm)

SATA power Cable x 1 (P/N: 25CRI-200B02-K1R)
Fanless Heatsink x 1 (P/N: 25ST1-113103-A7R)
Order Information

9MAPLKASMR-SI1 (Box Packing)

Optional Kit

TPM 2.0 module P/N: 9CTM000NR-00

TPM Cable P/N: 25CRZ-100600-S9R