Thermal resistance

Thermal resistance is the temperature difference between two specified points divided by the rate of heat flow through that path.

Other learning contexts (12)

In context

Its unit is K/W or °C/W; a larger value gives a larger temperature difference for the same heat flow. Specify the start and end points and measurement or boundary conditions.

Example

In a simple steady-state model, 20 W passing through a 0.5 K/W path produces a temperature difference of 10 K. This does not mean every actual package has only this single path.

Key distinction

Read a thermal resistance value together with the two points it connects and the associated conditions.

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