What is thermal resistance in heatsink

     When talking about thermal heatsink, we often hear a word - thermal resistance, which is the resistance encountered by the heat flow dissipated by  electronic devices in the transmission process (through a certain medium), and a comprehensive parameter reflecting the ability to prevent heat transfer.

  We use R  Indicates the thermal resistance, in ℃ / W; Its characteristics are similar to that of resistance, which is related to the thermal conductivity, volume, density, structure, surface area, color, geometric size and cooling conditions of dielectric materials. Before thermal equilibrium, the thermal resistance is a function of time (thermal reactance), but after thermal stability, the thermal resistance has nothing to do with time.

    R= Δ T/ P。 R Is the thermal resistance between the media, Δ T is the temperature difference between the media and P is the power input.