The Arm Cortex-M403+ MCU is a microcontroller unit developed by Arm Holdings, a British semiconductor and software design company. It belongs to the Cortex-M series, which targets embedded systems and IoT applications. The Cortex-M403+ is designed for industries such as industrial automation, consumer electronics, and automotive, offering high performance, energy efficiency, and real-time processing capabilities. Arm's MCUs are widely used by manufacturers worldwide to power smart devices, sensors, and control systems.