Reliability Toolkit

Junction Temperature & Thermal Resistance Calculator

Check the steady-state semiconductor junction temperature and its margin against your stated limit.

Engineering inputs

Supported range: -100 to 300.

Supported range: 1e-06 to 10000.

Use the effective thermal resistance for the actual PCB, airflow and enclosure. Supported range: 1e-06 to 1000.

Supported range: -100 to 500.

Results

Your calculation

Enter the inputs and select Calculate.

Model notes

One-node, steady-state junction-to-ambient model. Effective θJA depends on board layout, mounting, airflow, enclosure and power distribution; it is not a universal package property.

Further reading

Book References

Practical Reliability Engineering

Patrick D. T. O'Connor and Andre V. Kleyner

5th Edition. Wiley, 2012.

ISBN 9780470979822

Book details