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APX100
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Suppose supplier of NTC which I am using on my PCB, shut-down the production for thatthe NTC series. In this case if I am unable to find exactly the same component but rather found close match (by comparing B value @ R25/R100), then what are the parameters I should look in the new component so that it can best fit in my project without any glitch.

I saw in the datasheet R-T curve and temperature coefficient of resistance (alpha). However, I could not understood how alpha values were derived. I made several attempts to calculate alpha based on (https://www.ametherm.com/thermistor/ntc-thermistor-calculating-the-temperature-coefficient-of-a-thermistor) but I failed to get values mentioned in datasheet (NCP03XH103J05RL).

I tried to plot R-tT curve using given resistor value and tried to derive ADC value also and compared both but not sure if this is the correct way!

Example of NTC circuit:

schematic

simulate this circuit – Schematic created using CircuitLab

Suppose supplier of NTC which I am using on my PCB, shut-down the production for that NTC. In this case if I am unable to find exactly the same component but rather found close match (by comparing B value @ R25/R100), then what are the parameters I should look in the new component so that it can best fit in my project without any glitch.

I saw in the datasheet R-T curve and temperature coefficient of resistance (alpha). I tried to plot R-t curve using given resistor value and tried to derive ADC value also and compared both but not sure if this is the correct way!

Example of NTC circuit:

schematic

simulate this circuit – Schematic created using CircuitLab

Suppose supplier of NTC shut-down the production for the NTC series. In this case if I am unable to find exactly the same component but rather found close match (by comparing B value @ R25/R100), then what are the parameters I should look in the new component so that it can best fit in my project without any glitch.

I saw in the datasheet R-T curve and temperature coefficient of resistance (alpha). However, I could not understood how alpha values were derived. I made several attempts to calculate alpha based on (https://www.ametherm.com/thermistor/ntc-thermistor-calculating-the-temperature-coefficient-of-a-thermistor) but I failed to get values mentioned in datasheet (NCP03XH103J05RL).

I tried to plot R-T curve using given resistor value and tried to derive ADC value also and compared both but not sure if this is the correct way!

Example of NTC circuit:

schematic

simulate this circuit – Schematic created using CircuitLab

Source Link
APX100
  • 71
  • 2
  • 8

What factors/parameters shall be considered (or compare with original) while replacing NTC resistor?

Suppose supplier of NTC which I am using on my PCB, shut-down the production for that NTC. In this case if I am unable to find exactly the same component but rather found close match (by comparing B value @ R25/R100), then what are the parameters I should look in the new component so that it can best fit in my project without any glitch.

I saw in the datasheet R-T curve and temperature coefficient of resistance (alpha). I tried to plot R-t curve using given resistor value and tried to derive ADC value also and compared both but not sure if this is the correct way!

Example of NTC circuit:

schematic

simulate this circuit – Schematic created using CircuitLab