Derating Calculation -

Have you ever designed a circuit that worked perfectly on the bench, only to fail catastrophically in the field? The culprit is often not a bad solder joint or a software bug, but heat .

Components have theoretical maximum ratings printed on their datasheets. However, running a resistor at 100% of its rated power at 80°C ambient is a recipe for disaster. This is where comes in. derating calculation

Open your current design. Calculate the actual power/voltage stress at your max operating temperature. If any component is running above 80% of its datasheet max, upgrade it now. Have you ever designed a circuit that worked