Heatsink Junction To Case Resistance
Calculate junction-to-case thermal resistance from junction and case temperatures under steady dissipated power; junction temperature must be no lower than case temperature.
Description
Calculate junction-to-case thermal resistance from junction and case temperatures under steady dissipated power; junction temperature must be no lower than case temperature.
Heatsink Junction To Case Resistance: Calculate junction-to-case thermal resistance from junction and case temperatures under steady dissipated power; junction temperature must be no lower than case temperature.
When to use Heatsink Junction To Case Resistance
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.
- Junction Temperature (°C) (°C)
- Required number input.
- Case Temperature (°C) (°C)
- Required number input.
- Dissipated Power (W) (W)
- Required number input.
How Heatsink Junction To Case Resistance works
Calculate junction-to-case thermal resistance from junction and case temperatures under steady dissipated power; junction temperature must be no lower than case temperature. 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
- Thermal Resistance (K/W) (K/W)
- The resulting thermal resistance (k/w) returned as a number.
Limitations and assumptions
- Thermal-resistance arithmetic assumes the stated heat path, steady state, reference temperatures, and approximately linear properties. Interface materials, airflow, orientation, spreading resistance, transient thermal impedance, nearby heat sources, mounting torque, and enclosure temperature can dominate junction temperature.
- 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
-
Thermal conductance and resistance — Wikipedia contributors
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