| 摘要 |
Provided is a circuit protection device that has further increased the likelihood that a circuit can be protected. In a circuit switching element including a bimetallic element as a circuit switching component and a movable terminal, and a circuit protection device including a PTC element: (1) The PTC element and the movable terminal are electrically connected in parallel; (2) The circuit switching element operating at an operational temperature (Top) of the bimetallic element can interrupt a current flowing through the circuit switching element by moving the movable terminal that was positioned so as to allow the current to flow, and a return to a recovery temperature (Tcl) of the bimetallic element allows the current to flow through the circuit switching element by moving the movable terminal that was positioned so as to interrupt the current; (3) The operational temperature (Top) of the bimetallic element is at least 20 degrees Celsius higher than the recovery temperature (Tcl); (4) A trip temperature (Ttr) of the PTC element is at least 10 degrees Celsius higher than the operational temperature of the bimetallic element; and (5) The bimetallic element is positioned between the PTC element and the movable terminal.
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