A circuit protection device includes a solid-state resettable switch, a
first terminal in electrical communication with a first portion of the
switch, the first terminal configured to be connected to a load. A second
terminal is placed in electrical communication with a second portion of
the switch, the second terminal configured to be connected to a power
source. A controller is configured to enable the switch to be opened if
an accumulated energy meets or exceeds a preset I.sup.2t rating, the
accumulated energy based on a current sensed from an electrical point
between one of (i) the load and the switch or (ii) the voltage source and
the switch.