The controller should then be placed onto the vehicle/panel/heatsink.
It is important that the two surfaces are then rubbed together in order to help transfer the
thermal compound between the two surface.
The entire assembly is then bolted together at all mounting holes.
An example of a good thermal compound spreading can be seen in the photo below:-
How effective the spreading technique is can be checked by removing the controller and
inspecting the paste residue left on the mounting faces. On a well applied paste application, the
controller will be difficult to remove and a rippled surface will be left on the paste surface as
shown (magnified) below:-
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