Which of the following is NOT a type of polymer PTC (positive temperature coefficient) thermistor?
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A.
Monoswitch
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B.
Semifuse
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C.
Multifuse
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D.
Polyswitch
Correct Answer:
A. Monoswitch
Explanation:
Monoswitch is not a type of polymer PTC (positive temperature coefficient) thermistor. While PolySwitch, Multifuse, and Semifuse are recognized trade names or series for these resettable fuses, Monoswitch is not categorized among them. Polymer PTC devices, often referred to as PPTCs, consist of a plastic matrix mixed with conductive carbon particles. They function as resettable fuses by rapidly increasing resistance during overcurrent events and returning to a low-resistance state once the fault is cleared and the device cools down.
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