| About Thermistors > NTC Thermistor Characteristics > Resistance vs. Temperature Characteristics > Resistance/Temperature Ratio |
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| Resistance/Temperature Ratio |
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NTC thermistor manufacturers often define their different material by publishing nominal resistance ratios and ratio tolerances for R0/R50, R0/R70, and R25/R125, whereby "Rt" is the resistance at the corresponding temperature in degrees Celsius. The percent ratio tolerance specified depends on whether the thermistor is used as a broader tolerance point-matched device or a tight tolerance interchangeable device.
For instance, the most commonly specified resistance ratios for a 10,000 ohm Curve D thermistor are as follows: R0/R50 = 9.06 R0/R70 = 18.65 R25/R125 = 29.25 See also: Beta / Resistance Ratios Table |
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