Q. What is the resistance-temperature characteristic?
Q. What is the characteristic at temperatures other than the sensing temperature?
Q. What is the thermal resistance of "POSISTOR®" with the object to be measured?
Q. Are these Series available in taping packaging?
Q. Are there any precautions to take when packaging "POSISTOR®" with resin?
Q. Are there any precautions to take when soldering "POSISTOR®" leads?
Q. How to select "POSISTOR®" for Over Current Protection?
Q. Is the Series available in taping packaging?
Q. Are there any precautions to take when soldering "POSISTOR®" leads?
Q. Doesn't "POSISTOR®" malfunction due to rush current or surge noise caused when supplying power?
Q. When current has a special waveform (pulse, etc.), how much are the trip and hold currents?
Q. Can this Series be flow-soldered?
Q. Can this Series be reflow-soldered twice or more?
Q. What is the characteristic at temperatures other than the sensing temperature?
Q. Are there any precautions to take when potting "POSISTOR®" with resin?
Refer to "Data on Resistance-Temperature Characteristic Dispersion (1) ".
Refer to "Data on Resistance-Temperature Characteristic Dispersion (1) " mentioned in item "1" above.
The thermal resistance varies depending on the method of mounting "POSISTOR®" to the object to be measured. Since a difference occurs between the sensing temperature of the "POSISTOR®" element and the temperature of the object to be measured, thoroughly evaluate in consideration of the temperature difference, and then contact us.
Heat expands and contracts resin, applying stress to the "POSISTOR®" element. Therefore, elastic resin (resin with high heat conductivity such as those with silicone) must be used. Thoroughly evaluate whether the adhesive agent can be used, and then contact us.
The PTFL Series is available in 5mm lead pitch, inside-crimp taping packaging. The PTFM Series is only available in bulk packaging.
Heat expands and contracts resin, applying stress to the "POSISTOR®" element. Therefore, elastic resin (resin with high heat conductivity such as those with silicone) must be used. Thoroughly evaluate whether the resin can be used, and then contact us.
The "POSISTOR®" element and leads are soldered together. Because of this, solder the leads at a point 5mm or more away from the lead's root while making sure the soldering iron does not come into contact with the element and the resin-coated section of the leads.
Refer to "How to Select "POSISTOR®" for Over Current Protection".
When the operating temperature range is widened, the trip and hold currents are changed. Therefore, although great care must be taken, the range can be widened. For specifications, contact us.
The Series products are available in taping packaging.
The "POSISTOR®" element and leads are soldered together. Because of this, solder the leads at a point 5mm or more away from the lead's root while making sure the soldering iron does not come into contact with the element and the resin-coated section of the leads.
If supplying power is repeated in a short period of time, "POSISTOR®" may malfunction due to rush current or surge noise. Thoroughly evaluate whether "POSISTOR®" can be used for the application, and then contact us.
As for current with a special waveform (pulse, etc.), some people think that the trip and hold currents should be compared using values converted into root-mean-square values. However, this cannot be used in some cases. For details, contact us.
It can be flow-soldered within the range shown in the temperature-time relationship graph given below.
When soldering is repeated twice or more, make sure that the accumulated soldering time does not exceed the range shown in the graph below.
When soldering is repeated, note that the allowable time is the accumulated soldering time.
Refer to "Data on Resistance-Temperature Characteristic Dispersion (2) ".
Heat expands and contracts resin, applying stress to the "POSISTOR®" element. Therefore, elastic resin (resin with high heat conductivity such as those with silicone) must be used. Thoroughly evaluate whether the resin can be used, and then contact us.
This Series can not be flow-soldered.
When soldering is repeated twice or more, make sure that the accumulated soldering time does not exceed the range shown in the graph below.
When soldering is repeated, note that the allowable time is the accumulated soldering time.
Refer to "How to Select "POSISTOR®" for Over Current Protection" in the same way as for the PTGL Series.
When the operating temperature range is widened, the trip and hold currents are changed. Therefore, although great care must be taken, the range can be widened. For specifications, contact us.
Do not use the potting method to seal "POSISTOR®". Since the heat generated from "POSISTOR®" diffuses, it does not increase the resistance even when something abnormal has occurred in the circuit, so "POSISTOR®" may not operate normally.
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