Advanced Circuit Breaker Leverages MEMS Switching

Menlo Micro’s Ideal Switch can handle 10 A with a 0.010-Ω contact resistance for power-distribution applications like smart circuit breakers.
Sept. 9, 2025

In this video, Menlo Micro uses its MEMS Ideal Switch architecture in a circuit breaker demonstrator. The company’s high-power MM9200 MEMS switch, when combined with a solid-state switch, can create a hot-switch system that's smaller and lighter while running cooler than legacy solutions.  

The MM9200 targets applications like industrial automation, smart building controls, advanced energy-management systems, and many other space-constrained power-distribution applications. Its scalable design and process technology can address power distribution from microgrid to smart circuit breakers to smart point-of-load switching. 

Ideal Switch technology offers extreme mechanical endurance, typically in the billions of switching cycles, which brings a significantly better lifetime than traditional electromechanical relays. This reliability and its arc-free capability can reduce maintenance and replacement costs. Also, the device’s 10-µs actuation speed, more than 1,000X faster than its electromechanical equivalent, enables new concepts for power switching and protection solutions. 

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About the Author

Alix Paultre

Editor-at-Large, Electronic Design

An Army veteran, Alix Paultre was a signals intelligence soldier on the East/West German border in the early ‘80s, and eventually wound up helping launch and run a publication on consumer electronics for the US military stationed in Europe. Alix first began in this industry in 1998 at Electronic Products magazine, and since then has worked for a variety of publications in the embedded electronic engineering space. Alix currently lives in Wiesbaden, Germany.

Also check out his YouTube watch-collecting channel, Talking Timepieces

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