Generally, the tolerance of high-precision resistors should be less than 65438 0%, such as 0.5%, 0.65438 0%, 0.065438 0%, or the temperature coefficient is low. For example, 25PPM, 10PPM, 5PPM and so on.
In addition, small resistors, such as 10 milliohms, are also precision resistors.
Second, the highest precision of patch resistance is Jabisen patch resistance, with an accuracy of 0.0 1%, that is, one in ten thousand.
Third, there are few precision resistor manufacturers. There is high precision resistor of Jebusine Company in Shenzhen. Please search your own contact information.