| 摘要 |
<p>Provided is a protective device, which is obtained from a PTC element and a first non-resetting contact element electrically connected in parallel thereto, is characterized in that a second non-resetting contact element is electrically connected in series to the PTC element, and when the PTC element is tripped as a result of current being diverted by the opening of the first non-resetting contact element, the heat generated thereby opens the second non-resetting contact element.</p> |
