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Nomenclature of Resistance

Release time:

Mar 05,2024

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According to the ministerial standard (SJ-73), the naming of resistors and potentiometers consists of the following four parts: the first part (main name); Part II: (material); Part III (classification characteristics); Part IV (serial number). Their models and meanings are shown in the table below.

Example: Naming Meaning of RJ71-0.125-5.1kI Type: R Resistor-J Metal Film -7 Precision -1 Serial Number -0.125 Rated Power -5.1k Nominal Resistance-I Error 5%.

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Nomenclature of Resistance

According to the ministerial standard (SJ-73), the naming of resistors and potentiometers consists of the following four parts: the first part (main name); Part II: (material); Part III (classification characteristics); Part IV (serial number). Their models and meanings are shown in the table below.

2024-03-05

Five Applications of Resistors

In the electronic circuit design is often used in a component is the resistor, we all know that the resistor in the circuit plays the role of voltage limiting. However, in actual use, a special resistor will be used: zero ohm resistor, hence the name. The resistance value of zero ohm resistor is zero. For beginners may have a question: since the resistance is zero, what is the difference with a wire? Why not directly connected? In fact, there is a difference between zero ohm resistance and direct wire connection, and there are many clever uses of zero ohm resistance in circuit design.

2024-03-05

The main performance indicators of resistance

Under the specified ambient temperature and humidity, assuming that the surrounding air is not circulating, the maximum power allowed to be dissipated on the resistor under long-term continuous load without damage or substantial change in performance. In order to ensure safe use, the rated power is generally 1-2 times higher than the power consumed in the circuit. Rated power is divided into 19 grades, commonly used are 0.05W, 0.125W, 0.25W, 0.5W, 1W, 2W, 3W, 5W, 7W, 10W.

2024-03-05

What is the use of resistance

Divider voltage is to divide the required voltage through series resistors, and the size is distributed in proportion to the size of the resistors. A plurality of electrical appliances with different rated currents can be connected to the trunk of the circuit at the same time, and a part of the voltage is shared by the voltage division of the series resistor to ensure that the voltage of the electrical device does not exceed the rated voltage.

2024-03-13

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