| 摘要 |
There is provided a circuit protection device with even more possibility of protecting a circuit. In a circuit protection device comprising a circuit switching element which comprises a bimetal element as a circuit switching component and a movable terminal as well as a PTC element, (1) the PTC element and the movable terminal are connected electrically in parallel; (2) the circuit switching element is able to cut off current flowing through the circuit switching element by moving, through the actuation of the bimetal element at its actuating temperature (Top), the movable terminal positioned to pass current, and is able to pass current through the circuit switching element by moving, through the resetting of the bimetal element at its reset temperature (Tcl), the movable terminal positioned to pass current; (3) the actuating temperature (Top) of the bimetal element is at least 20° C. higher than the reset temperature (Tcl) of the bimetal element; (4) a trip temperature (Ttr) or the PTC element is at least 10° C. higher than the actuating temperature of the bimetal element; and (5) the bimetal element is placed between the PTC element and the movable terminal.
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