# Thermistors FAQ

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## NTC Thermistors

- Q [NC* Series] If a current that exceeds the allowable maximum operating current passes through this NTC Thermistor, what happens to the thermistor?
- Q [NC* Series] When measuring the resistance of this NTC Thermistor, how much current should be passed through the thermistor?
- Q [NC* Series] What is the thermal time constant of this NTC Thermistor ?
- Q [NXF Series] What is the measurement temperature error at each temperature?
- Q [NXF Series] If a current that exceeds the allowable maximum operating current passes through this NTC Thermistor, what happens to the thermistor?
- Q [NXF Series] When measuring the resistance of this NTC Thermistor, how much current should be passed through the thermistor?
- Q [NXR Series] What is the measurement temperature error at each temperature?
- Q [NXR Series] If a current that exceeds the allowable maximum operating current passes through this NTC Thermistor, what happens to the thermistor?
- Q [NXR Series] When measuring the resistance of this NTC Thermistor, how much current should be passed through the thermistor?

- Q Does Chip NTC Thermistor have waterproof structure?
- Q [NXF Series] Are there any precautions to take when selecting an adhesive agent to fix this NTC Thermistor to the object to be measured?
- Q [NXF Series] Are there any precautions to take when packaging this NTC Thermistor with resin?
- Q [NXF Series] Are there any precautions to take when soldering to the leads of this NTC Thermistor?
- Q [NXR Series] Are there any precautions to take when selecting an adhesive agent to fix this NTC Thermistor to the object to be measured?
- Q [NXR Series] Are there any precautions to take when packaging this NTC Thermistor with resin?
- Q [NXR Series] Are there any precautions to take when soldering to the leads of this NTC Thermistor?

## PTC Thermistors (POSISTOR)

- Q [PTFL/PTFM Series] What is the resistance-temperature characteristic?
- Q [PTFL/PTFM Series] What is the characteristic at temperatures other than the sensing temperature?
- Q [PTGL Series] How to select "POSISTOR" for Over Current Protection?
- Q [PRG Series] How to select "POSISTOR" for Over Current Protection?
- Q [PRG Series] Could this products raise Max. voltage ?
- Q [PRG Series] Can operating temperature range be widened?
- Q [PRG Series] What are the maximum rating wattage values?
- Q [PRG Series] Why dose "Chip type Ceramic PTC Resettable Fuse(Posistor)" be tripped under rating hold current?
- Q [PRG Series] Why dose "Chip type Ceramic PTC Resettable Fuse(Posistor)" be not tripped over rating trip current?
- Q [PRG Series] What are the shrinked current values after this series tripped?
- Q [PRG Series] Do you have more maximum voltage resistance, or more hold current series?
- Q [PRF Series] What are the variation of resistance-temperature characteristics?
- Q [PRF Series] Can operating temperature range be widened?
- Q [PRF Series] What dose mean rating maximum voltage?
- Q [PRF Series] What are the maximum rating wattage values?

- Q [PTGL Series] Though the operating temperature range is specified between -10°C and +60°C, can this range be widened?
- Q [PRG Series] What kind of failure mode of "Chip type Ceramic PTC Resettable Fuse(Posistor)".
- Q [PRG Series] When usage of over rating (voltage, operating temperature range), what kind of failure mode will occur?
- Q [PRG Series] What conditions should I store this series?
- Q [PRG Series] Is a pretreatment required when using "Chip type Ceramic PTC Ressetable Fuse (Posistor)"?
- Q [PRG Series] How is certification of safty standards.
- Q [PRG Series] How is certification of CCC and CQC safety standards of China?
- Q [PRF Series] What kind of failure mode of "PTC thermistor for overheat sensing"?
- Q [PRF Series] When usage of over rating (voltage, current), what kind of failure mode will occur?
- Q [PRF Series] What conditions should I store this series?
- Q [PRF Series] Is a pretreatment required when using "PTC thermistor for overheat sensing"?
- Q [PRF Series] How is certification of safty standards.
- Q [PRF Series] How is certification of CCC and CQC safety standards of China?

- Q [PTFL/PTFM Series] What is the thermal resistance of "POSISTOR" with the object to be measured?
- Q [PTFL/PTFM Series] Are there any precautions to take when selecting an adhesive agent to fix "POSISTOR" to the object to be measured?
- Q [PTFL/PTFM Series] Are there any precautions to take when packaging "POSISTOR" with resin?
- Q [PTFL/PTGL Series] Are there any precautions to take when soldering to the leads of this PTC Thermistor?
- Q [PTFM series] What torque value do you recommend when you moust ths product with screw?
- Q [PTFM series] Are there any precautions to take when soldering to the leads of this PTC Thermistor?
- Q [PRG Series] Can this series be flow-soldered?
- Q [PRG Series] Is a baking process required when soldering of "Chip type Ceramic PTC Ressetable Fuse (Posistor)"?
- Q [PRG Series] What is a MSL level of "Ceramic PTC Ressetable Fuse (Posistor)"?
- Q [PRG Series] What are reflow soldering conditions of this series?
- Q [PRG Series] Can this series be manual solderd? What is manual soldering condition?
- Q [PRG Series] What is the recommended land dimensions?
- Q [PRG Series] Do you take any precautions for flux cleaning?
- Q [PRF Series] Can this series be flow-soldered?
- Q [PRF Series] What is a MSL level of "PTC thermistor for overheat sensing"?
- Q [PRF Series] What are reflow soldering conditions of this series?
- Q [PRF Series] Can this series be manual solderd? What is manual soldering condition?
- Q [PRF Series] What is the recommended land dimensions?
- Q [PRF Series] Do you take any precautions for flux cleaning?

- Q [PRG Series] Please let me know the weight of product?
- Q [PRG Series] Please let me know the weight of a packing material.
- Q [PRG Series] Are there any "Chip type Ceramic PTC Ressetable Fuse (Posistor)" that comply with the European RoHS Directive?
- Q [PRF Series] Please let me know the weight of product?
- Q [PRF Series] Please let me know the weight of a packing material.
- Q [PRF Series] Are there any "PTC thermistor for overheat sensing" that comply with the European RoHS Directive?

- Q [PRG Series] Can this series be coated by resin, or potting?
- Q [PRG Series] Can this series use on AC circuit?
- Q [PRG Series] Can this series use over rating maximum voltage with series connect of products?
- Q [PRG Series] Can this series use over rating hold current with parallel connect of products?
- Q [PRG Series] Can "Chip type Ceramic PTC Ressetable Fuse (Posistor)" use as surge protector?
- Q [PRF Series] Can this series be coated by resin, or potting?
- Q [PRF Series] Can this series use on AC circuit?

- Q [PTFL/PTFM Series] Are these Series available in taping packaging?
- Q [PTGL Series] Is the Series available in taping packaging?
- Q [PRG Series] What is the mechanism of "Chip type Ceramic PTC Ressetable Fuse (Posistor)" ?
- Q [PRG Series] Is there a polar character for "Chip type Ceramic PTC Ressetable Fuse (Posistor)"?
- Q [PRG Series] Is there a marking on product series?
- Q [PRG Series] What is series of "Lead type Ceramic PTC Ressetable Fuse (Posistor)"?
- Q [PRF Series] What is the mechanism of "PTC thermistor for overheat sensing" ?
- Q [PRF Series] Is there a polar character for "PTC thermistor for overheat sensing"?
- Q [PRF Series] Is there a marking on product series?
- Q [PRF Series] What is series of lead type PTC thermsitor for overheat sensing?