PTC Thermistors (POSISTOR®) FAQ

Characteristics

[PRG Series] How to select "POSISTOR®" for Over Current Protection?

Item to be checked

Selection criteria

How much (in volts) is the power supply voltage of the circuit in which "POSISTOR®" is used?
(Preventing "POSISTOR®" from being damaged)
Power supply voltage ≦ Maximum voltage of "POSISTOR®"
When the circuit is operating normally, how much (in amperes) is the current that flow through "POSISTOR®"?
(Preventing "POSISTOR®" from malfunctioning)

Normal current ≦ Non-operating current of "POSISTOR®"

When something abnormal such as a short circuit has occurred, how much (in amperes) is the current that flows through "POSISTOR®".
(Ensuring reliable protection)

Abnormal current ≧ Operating current of "POSISTOR®"

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