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Multifuse devices act as circuit protection components by limiting dangerous current surges, such as short circuits, in electrical equipment. They provide protection as they react to an over-current event by changing from a very low resistive state to a very high resistive state. This is known as the positive temperature coefficient effect or PTC effect. What makes these devices special, is that once the over-current surge has passed, the Multifuse device will reset to its low resistive state again and allow the equipment to resume operation. Therefore, they are known as resettable fuses.
PTM Published on: 2008-03-03
