Precision resistor for small electrically operated applications

19th October 2018
Posted By : Alex Lynn
Precision resistor for small electrically operated applications

With the BVF precision resistor, Isabellenhütte Heusler has developed a precision resistor that not only impresses with its overall size 1213 (3.1x3.3mm), but also with its high load capacity and precision in use. Smaller electrically-operated applications in particular benefit from the properties of the high-performance component that Isabellenhütte has now included in its series repertoire.

The temperature coefficient of the BVF precision resistor is just under 70ppm/K. The thermal resistance is also extremely low at 10K/W. This results in the high load capacity of the BVF of three watts at up to a temperature of 145°C at the contact point. The component is suitable for a temperature range from -65 to +175°C and is therefore above the current required limits for typical automotive applications.

The application of the ISA-WELD procedure developed by Isabellenhütte in conjunction with the material NOVENTIN allows for maximum design flexibility, resulting in the small overall size and the stepped shape of the BVF.

The resistance alloy NOVENTIN newly developed by Isabellenhütte ensures that the sophisticated BVF is stable on the one hand and still delivers accurate measurement results on the other hand, even after 2,000 hours with only slight deviations of less than one percent at a contact point temperature of 145°C. The combination of the small overall size with the simultaneously high performance capability with very good stability values across the entire temperature range is currently unique on the international market.

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