Chip resistors are quite widely used in modern electrical engineering.
They are an absolute analogue of the usual output resistors, but have an important advantage - the size. It is using these devices that allows you to create a modern computing and radio-electronic technique.
They apply to SMT technology, which is characterized by the highest automation of the installation of printed circuit boards.
To create chip resistors, use thin-film or thick-gligration technology, and the devices themselves have different levels of resistance error. The most common values are 5% or 1%, and more accurate about 0.01%.
They are used in medical and measuring equipment, automotive and consumer electronics, various telecommunication devices, power supplies, and other equipment. There is a huge number of devices of different purposes, among them:
- Tolstopnoe;
- low-voltage used to determine current force;
- precision film with stable characteristics;
- Corrosive;
- variables;
- assembly;
- Overwhelming voltage emissions.
Features marking chip resistors
To navigate in the presented assortment of chip resistors, it is necessary to take into account their marking. Almost all resistors, with the exception of the sizes of 0402, are marked.
Small devices do not have labeling, because they are simply there is no place where it is possible to put it. If the size exceeds 0805, the labeling is installed on the resistor, which contains 3 digits.
It is known that chip resistors with a tolerance of 10%, 5%, as well as 2% labeled first three digits. Each number has a strict meaning. The last number on the marking indicates the number of Omms.
Whereas the first two numbers express Mantissa. To designate the decimal point, sometimes the letter R. is added to the meaningful numbers. It turns out that marking 242 denotes the nominal 24x102 Ohm, and this is 2.4 com.
Depending on the resistance tolerance, the rates can be separated into several Rows E6, E12, as well as E24. If the tolerance of resistance is small, in a number more than the denominations.
The maximum voltage of chip resistors is 200V. This maximum also possess standard resistors for simple installation. That is why when transmitting a significant voltage, for example 500V, it is worth putting several resistors that are connected in series.
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