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PTC heating elements aimed at electric cars

16 Feb 2015

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TDK Corp. has introduced the EPCOS PTC heating elements for electric vehicles. Compared with heating elements for conventional 12V on-board power supplies, the latest components are designed for the considerably higher voltage batteries in electric vehicles, stated the company.

The rated voltages of these heating elements cover the range from 200V to 500V, enabling surface temperatures of up to 250°C to be achieved. Depending on the design, these heating elements are suitable for safe operation at up to 1kV.


Whereas cars with combustion engines can use waste heat for heating the passenger compartment, electric vehicles require electrical heating. PTC heating elements, which are connected in arrays and installed in heat exchangers, represent an ideal solution as they are self-regulating. The flow of current increases not only the temperature of these ceramic elements, but also their resistance, thereby limiting the current and establishing a stable equilibrium. Depending on customer requirements, the EPCOS PTC heating elements can be manufactured in a variety of geometries and with different electrical and thermal properties.

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