Chip resistors deliver resistance values up to 10TΩ for operation at up to 300ºC
The maximum continuous working temperature of standard components with nickel/tin terminals is usually specified as +155ºC (tin has a peak temperature of 230ºC while nickel is limited to 160ºC). By using superior materials, and combining an inner terminal of silver/palladium with a wrap-around of platinum/silver, Riedon is able to offer chip resistors that can work in applications up to 300ºC.
Suitable for silver epoxy attachment which provides the reliability and high temperature performance essential for the temperature probes and pressure monitoring devices used in oil and gas exploration, these chip resistors are completely non-magnetic and can be used in the presence of strong magnetic fields, such as medical CT and MRI scanners. Similarly, no tin avoids the ‘tin-whisker’ problem that can be a concern in aerospace applications. The CHR series of non-magnetic chip resistor provides resistance values from 1 Ohm to 10MΩ with power ratings from 0.05W to 1.5W, depending on package size (from 0402 to 4020). Various resistance tolerances are available, from as low as ±0.5%, along with TCRs (temperature coefficient of resistance) specified from ±50ppm/ºC.
The standard temperature range is -55ºC to +155ºC with the HT version extending to +300ºC. The HVS series of higher value resistors from 100kΩ to 10TΩ are suitable for operation up to 6000V. Again, power-rating options are available up to 1.5W with an HT version provides high temperature operation up to +300ºC. VCR is also specified across the range, starting from as low as 10ppm/V.
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