Is metal foil resistance stable under temperature changes?

Metal foil resistors exhibit extremely high stability under temperature changes. Here are some key points to illustrate its stability:

1. Extremely low temperature coefficient (TCR): Metal foil resistors have an extremely low temperature coefficient, which is their inherent advantage. At a temperature range of -55 ℃ to+125 ℃ and a reference temperature of+25 ℃, the Z-foil resistor has a typical TCR of ± 0.2 ppm/° C. At a temperature range of 0 ℃ to 60 ℃ and a reference temperature of+25 ℃, the Z-foil resistor exhibits a typical TCR of ± 0.05 ppm/° C.

2. Rapid thermal stability: Metal foil resistors can reach thermal stability within 1 second, which means that they can quickly adapt and maintain a stable resistance value under rapid temperature changes.

3. Load life stability: At an ambient temperature of 70 ℃ and a rated power of 2000 hours, the typical variation value of the resistance value of the metal foil resistor is 25ppm, with a maximum variation value of 200ppm. This indicates that it has extremely high stability under long-term load.

4. Annual stability: The foil resistor uses precision rolled alloy foil with a thickness of about 3 microns, which has natural stability. Using this type of foil material, the stress free standard resistor that has been precision processed has an annual stability of over 0.1ppm, making it the most stable standard resistor in the world.

5. Long term stability test: The stability test results of metal foil resistors over 29 years showed that 50 S102C 10 k Ω resistor samples were continuously tested at a temperature of 70 ° C and a power of 0.1 W, with an average resistance change of only 60 ppm.

6. Shelf life test: The VHP101 series foil resistors provided by the customer have a shelf life test result of over 8 years, with an average resistance change of no more than 1ppm.

In summary, metal foil resistors are very stable in temperature changes, thanks to their extremely low temperature coefficient, rapid thermal stability, excellent load life stability, and long-term stability. These characteristics make metal foil resistors an ideal choice for high-precision and high stability applications.