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Power Resistor Heatsinks Slide 8

In summary, power resistors often require heatsinks to maintain operating temperature. Required thermal resistance needs to be calculated. Finally, there are a few things to consider when working with heatsinks: convection cooling requires thermal grease or pad and proper pressure, heatsink thermal resistance depends on the surface area in contact with ambient air and if the heatsink is too large, a fan can be used or a resistor with a lower thermal resistance can be utilized.

PTM Published on: 2011-05-03