One of the critical criteria when selecting miniature circuit breakers is their trip curve. Awareness of these curves will help you select the right breakers for your applications, and diagnose potential nuisance tripping issues. 

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Miniature Circuit Breakers (MCBs) are available with different tripping characteristics, or trip curves, which allow selection of the best protection of cables and different types of loads in different applications. This white paper explains the design and technology of modern, current-limiting MCBs and their trip curves.