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Thermally Sensitive Resistor (Thermistor) or RTH

Using the MIL-HDBK-217F notice 2 approach to FIT in section 9.1, the formula is as follows:

λ_P= λ_bπ_Tπ_Pπ_Sπ_Qπ_E

Base number	0.0019	0.0019
Upper Temperature Usage (°C) C1:Ea=0.2, C2:Ea=0.08		1
Operating Power (W)		1
Power Stress Factor (Normal % of operating power)		1
Part Grade		1
Environment of use		1

	FIT (Failure in Time = mean in 1E6 hrs)	0.0019
	MTBF (hrs)	526315789.474
	MTBF (yrs)	60081.7111271