Dual Rated AC/DC Circuit Breakers

Standard dual-rated ac/dc circuit breakers may be used in dc system applications and will provide thermal (overload) protection as shown on the ac time-current characteristics curve. These circuit breakers are UL Listed for application in dc systems using the instantaneous trip multiplier for the ac time-current characteristic curve. Standard ac/dc circuit breakers may be used on grounded or ungrounded dc systems.  QO/QOB – Available with dc voltage ratings from 48 Vdc to 125 Vdc.
QOU – Available with dc voltage ratings from 48 Vdc to 125 Vdc
Multi 9 – Available with dc voltage ratings from 60 Vdc to 125 Vdc
FA and LA – Available with dc voltage ratings from 125 Vdc to 250 Vdc
PowerPact® H-frame and J-frame – UL/CSA labeled for applications up to 250 Vdc

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