MIL-PRF-23648-20 Resistor, Thermal \(Thermistor\), Insulated Negative Temperature Coefficient Style Rth44This specification covers the detail requirements for style RTH44 thermistors. This style is available in resistance ratios A, B, and C. The only terminal lead available is S type. Resistance tolerance versus temperature characteristics F, G, J, and K are applicable through the maximum temperature of 125 Degrees C.

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MIL-PRF-23648/20C

FIGURE 2. Derating curve for high ambient temperatures.

3.6 Resistance.

3.6.1 Resistance at 25�C. Standard values shall be as specified in MIL-PRF-23648 except that the 5

percent decade values shall also be used for resistance tolerance F and G. Minimum and maximum

resistance values shall be in accordance with table I.

TABLE I. Minimum and maximum resistance values

(at 25�C) for each available resistance ratio.

Ratio

48.7 (C)

19.8 (A)

29.4 (B)

Ohms

300 min

100 min

15k min

3k max

10k max

500k max

3.6.2 Resistance at temperatures other than 25�C. Factors for determining resistance at

temperatures other than 25�C are determined by multiplying the zero-power resistance at 25�C by the

factors shown in table II for the applicable resistance ratio.