> For the complete documentation index, see [llms.txt](https://docs.hackerfab.org/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hackerfab.org/home/fab-toolkit/smu.md).

# SMU

A **Source Measure Unit (SMU)** is an electronic instrument that combines voltage and current sourcing with precise measurement capabilities. It is widely used for electrical characterization of semiconductor devices and electronic components, allowing current-voltage (I-V) characteristics to be measured under controlled conditions.

SMUs can operate in voltage-source or current-source mode while measuring the corresponding electrical response. They typically provide adjustable compliance limits to protect the device under test (DUT) from excessive current or voltage.

This section documents the design and development of SMU instruments.


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