About us

Our company was first mentioned in a document in 1482 as a copper smelter on the Nanzenbach. From 1728 onwards, our current name was also used when the company became the property of Princess Isabella Charlotte zu Nassau. Since 1827, Isabellenhütte has been owned by the eighth generation of the Heusler family. Today, we manufacture high-tech products for current measurement in the form of alloys, resistors and measurement technology, which are used worldwide by leading manufacturers in industries such as mobility, aerospace, industrial applications, medical technology and many more.

500 years of evolution: from coppersmith to innovation leader

On our journey from a traditional copper smelter to a manufacturer of high-precision alloys, resistors and measurement technology, we have constantly reinvented ourselves as a company. What began over 500 years ago with the smelting of copper has evolved over the years into the development and manufacture of high-tech products of international importance.
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Today, we are driven by the precise measurement of electrical currents

Isabellenhütte is one of the world's leading manufacturers of electrical resistance materials and thermoelectric materials for temperature measurement as well as passive components for the automotive, electrical and electronics industries.

The precision measurement technology division sets standards in the measurement of current, voltage and temperature in cars and trucks, as well as in hybrid and electric vehicles and in industrial and renewable energy generation systems.

Made in Germany

As a global technology leader, we remain true the Dillenburg location.

Germany is an attractive location for us, both historically and in the future, and not just for traditional reasons - as a family-owned company that has a high level of product expertise as well as in-depth manufacturing know-how and must continue to do so in the future. The production of alloys, resistors and sensors at our company headquarters represents a globally unique value chain.

From the foundry to the wire mill and clean room production, all the key production steps in the value chain are concentrated here. This enables us to guarantee the highest possible quality, as development, quality management and assurance as well as technical expertise are completely in our own hands.

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How we work