What is the difference between a mechanical and solid-state circuit breaker?

Solid-state technology guarantees an extremely fast interruption and clears a fault in a few microseconds. In comparison, a mechanical circuit breaker with the same frame size takes a few milliseconds. ABB’s solid-state circuit breaker can detect and respond to a short circuit fault 100 times faster than a mechanical circuit breaker.

What is a solid-state circuit breaker?

Solid-state circuit breakers are faster, can be dynamically adjusted and can be connected to the intelligent network and monitored remotely. They can be used in various applications, including residential, commercial and industrial AC systems.

Are electro-mechanical circuit breakers replaced by intelligent solid-state devices?

In multiple applications, conventional Electro-mechanical circuit breakers are now replaced by intelligent solid-state devices with increased performance in term of control and protection capabilities. Read more Would you like a guided tour to discover ST's new look? Click on each block to learn more about ST's offers.

How fast can a solid state circuit breaker detect a short circuit?

ABB’s solid-state circuit breaker can detect and respond to a short circuit fault 100 times faster than a mechanical circuit breaker. Energy storage systems and their corresponding electrical grid services are strongly affected by the downtime in case of an internal fault.

Are sic FETs a good choice for solid-state circuit breakers?

Interest in solid-state circuit breakers is rising, and normally-off SiC FETs in a dual-gate setup offer a simplified path to high-current DC and AC protection solutions. 10BASE-T1S is set to replace traditional interfaces, while being faster and only using single twisted pair.

Why are solid-state circuit breaker variants gaining a bigger market share?

With advancements in the wide-bandgap semiconductor technology, solid-state circuit breaker variants are taking on a bigger market share. Wide-bandgap semiconductor switches have lower on-state losses and higher efficiency during normal operation compared to silicon-based semiconductors.