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Home > Thermistor > F.A.Q. > PTC Thermistors
How to Select "POSISTOR" for Overcurrent Protection


square Item to be checked space square Selection criteria
How much (in volts) is the power supply voltage of the circuit in which "POSISTOR" is used?
(Preventing "POSISTOR" from being damaged)
arrow Power supply voltage <= Maximum voltage of "POSISTOR"
arrow space space
When the circuit is operating normally, how much (in amperes) is the current that flow through "POSISTOR"?
(Preventing "POSISTOR" from malfunctioning)
arrow Normal current <= Non-operating current of "POSISTOR"
arrow space space
When something abnormal such as a short circuit has occurred, how much (in amperes) is the current that flows through "POSISTOR".
(Ensuring reliable protection)
arrow Abnormal current >= Operating current of "POSISTOR"
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