NTC 20k β3950 thermistor chart: resistance table (°C)
Resistance in ohms of an NTC thermistor with R₂₅ = 20kΩ and β = 3950 K, calculated with the Beta model from -40 °C to 125 °C. Real parts follow their manufacturer’s R/T table, which can differ from the Beta model by a few percent far from 25 °C; use these values for design estimates and check critical points against the datasheet.
Each row is a 10-degree step; the column adds the units digit (subtracts it in rows below zero). Example: 100 + 5 → 105 °C.
| °C | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|
| -40 | 803720 | |||||||||
| -30 | 400410 | 428190 | 458160 | 490500 | 525420 | 563150 | 603950 | 648090 | 695870 | 747620 |
| -20 | 210770 | 224220 | 238660 | 254140 | 270770 | 288630 | 307840 | 328490 | 350710 | 374630 |
| -10 | 116490 | 123360 | 130680 | 138510 | 146860 | 155800 | 165350 | 175570 | 186500 | 198220 |
| -0 | 67241 | 70911 | 74810 | 78955 | 83363 | 88052 | 93044 | 98359 | 104020 | 110060 |
| 0 | 67241 | 63786 | 60532 | 57466 | 54575 | 51849 | 49277 | 46850 | 44559 | 42394 |
| 10 | 40349 | 38416 | 36588 | 34859 | 33223 | 31674 | 30208 | 28818 | 27502 | 26254 |
| 20 | 25071 | 23948 | 22883 | 21872 | 20912 | 20000 | 19134 | 18310 | 17527 | 16783 |
| 30 | 16074 | 15400 | 14759 | 14148 | 13566 | 13011 | 12483 | 11979 | 11498 | 11040 |
| 40 | 10603 | 10186 | 9787.3 | 9406.8 | 9043.5 | 8696.3 | 8364.5 | 8047.3 | 7744 | 7453.9 |
| 50 | 7176.4 | 6910.8 | 6656.6 | 6413.2 | 6180.1 | 5956.9 | 5743 | 5538 | 5341.4 | 5153 |
| 60 | 4972.3 | 4799 | 4632.7 | 4473.1 | 4319.9 | 4172.7 | 4031.5 | 3895.8 | 3765.4 | 3640.1 |
| 70 | 3519.7 | 3403.9 | 3292.6 | 3185.5 | 3082.5 | 2983.4 | 2888 | 2796.2 | 2707.8 | 2622.6 |
| 80 | 2540.6 | 2461.7 | 2385.5 | 2312.2 | 2241.5 | 2173.3 | 2107.6 | 2044.2 | 1983.1 | 1924.1 |
| 90 | 1867.2 | 1812.2 | 1759.2 | 1708 | 1658.5 | 1610.7 | 1564.6 | 1520 | 1476.9 | 1435.3 |
| 100 | 1395 | 1356.1 | 1318.5 | 1282.1 | 1246.9 | 1212.8 | 1179.9 | 1148 | 1117.1 | 1087.2 |
| 110 | 1058.3 | 1030.3 | 1003.1 | 976.83 | 951.35 | 926.67 | 902.75 | 879.57 | 857.1 | 835.31 |
| 120 | 814.18 | 793.69 | 773.81 | 754.53 | 735.82 | 717.67 |
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