MicroTCA® is a modular, open standard for building high performance switched fabric computer systems in a small form factor.

At its core are standard Advanced Mezzanine Cards which provide processing and I/O functions. MicroTCA systems are both physically smaller and less expensive than AdvancedTCA systems, although their internal architectures are largely the same.

MicroTCA was originally intended for smaller telecom systems at the edge of the network but has moved into many non-telecom applications, with standardized, ruggedized versions becoming popular in mobile, military, telemetry, data acquisition, and avionics applications.