Reliability Toolkit
Norris-Landzberg Thermal Cycling Acceleration Factor Calculator
Compare field and test thermal-cycling profiles for solder-joint fatigue using the classical Norris-Landzberg model.
Engineering inputs
Results
Your calculation
Enter the inputs and select Calculate.
Results use the selected model and supplied parameters. RDT test-time results are rounded up to 0.001 of the selected time unit.
Model notes
Classical SnPb coefficients: 1.9 for excursion, 1/3 for frequency and 1414 K for maximum temperature. Acceleration is cycle-based; maximum temperature is the solder-joint temperature. Applicability depends on alloy and assembly.
Further reading