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Junction Temperature from Thermal Resistance

Online junction temperature from thermal resistance. Single steady-state thermal resistance model; no safety rating inferred.

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junction temperature from thermal resistance calculator online

Use junction temperature from thermal resistance online for ambient C, power W, theta C W. Single steady-state thermal resistance model; no safety rating inferred. Ideal nominal component model. Verify topology, operating range, tolerances and ratings against the actual component datasheet.

How to use it

Enter ambient C. Set power W, theta C W. Select Calculate and check the labeled output. Copy or download the JSON result.

Options and example settings

OptionChoices / valueExample default
ambient CMain input. Signed finite values. 25
power WOption. Zero or positive values. 2
theta C WOption. Positive values. 30

Calculation method

junction_C = ambient_C+power_W*theta_C_W (^ means exponentiation; trig functions ending in d use degrees).

Worked examples

Apply junction temperature from thermal resistance to the case below, keeping the displayed units and assumptions. Single steady-state thermal resistance model; no safety rating inferred.

Junction Temperature from Thermal Resistance — worked case

Settings: power W: 2; theta C W: 30

Input:

25

Calculated result for these inputs:

Output:

{
  "junction_C": 85
}

Choose the right tool

Match the topology before entering values: series and parallel networks, inverting and noninverting stages, and buck and boost converters use different equations. Component ratings, parasitics, protection and measured conditions require separate review.

Limitations and common mistakes

  • Single steady-state thermal resistance model; no safety rating inferred. Ideal nominal component model. Verify topology, operating range, tolerances and ratings against the actual component datasheet.
  • Use the displayed unit in every field. Ratios and percentages are different inputs; percent fields use values such as 25 rather than 0.25.

Frequently asked questions

How can I use junction temperature from thermal resistance calculator online?

Enter ambient C. Set power W, theta C W. Select Calculate and check the labeled output. Copy or download the JSON result.

Technical references

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

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