FIT Failure Rate
Convert a constant failure rate in failures per hour to FIT (failures per billion device-hours). FIT=λ×10⁹; it is an expected population rate, not a prediction of an individual device's failure date.
Description
Convert a constant failure rate in failures per hour to FIT (failures per billion device-hours). FIT=λ×10⁹; it is an expected population rate, not a prediction of an individual device's failure date.
FIT Failure Rate: Convert a constant failure rate in failures per hour to FIT (failures per billion device-hours). FIT=λ×10⁹; it is an expected population rate, not a prediction of an individual device's failure date.
When to use FIT Failure Rate
Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.
- Failure rate (1/h)
- Required number input.
How FIT Failure Rate works
Convert a constant failure rate in failures per hour to FIT (failures per billion device-hours). FIT=λ×10⁹; it is an expected population rate, not a prediction of an individual device's failure date. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.1
- fit
- The resulting fit returned as a number.
Limitations and assumptions
- A constant failure rate or FIT conversion applies only within the assumed part of a reliability model. Infant mortality, wear-out, confidence bounds, environment, duty cycle, screening, repair, common-cause failures, and population heterogeneity need separate treatment.
- Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.
Alternative or Complementary approaches
Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.
References
-
Failure rate — Wikipedia contributors
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