The special design features of these metal strip resistors offer a series of advantages compared to the known axially capped wirewound resistors due to the use of a technologically differently designed resistance element. This is punched as a meander from a metal strip (special alloy of Ni / Cr / Fe / Cu). The connecting wires (DUMET wires) are welded to the metal strip without using any caps.
Thus, the two-dimensional structure has only a minimal inductive resistance. The negative effect of the strong temperature drop from the „hotspot zone“ in the middle of the resistor to the two ends, which is sufficiently known from axial and capped resistors, does not occur with MPC resistors since the connecting wires have a substantially smaller surface than the element and no caps. The consistent temperature distribution over the element, which is thus largely been achieved, is additionally supported by housing the element in a hermetically sealed ceramic housing. Spaces are lined with ceramic powder before closing with special cement.
Due to the almost consistent heat dissipation across the entire housing, there is even the possibility of a multiple increase in the power rating by putting a suitable heat sink over the housing.
