Detailed explanation of commonly used SMT resistor resistance values - Basic knowledge of electronic components

In the field of electronic engineering, understanding commonly used electronic components is very important. Among them, SMT resistors are a common component used to limit current and share voltage. This article will provide a detailed introduction to the relevant knowledge of SMT resistors, including their common resistance values and their applications in circuits

1、 Common resistance values of SMT resistors

The resistance value of SMT resistors is usually expressed in ohms (Ω). The following are some common SMT resistance values:

1 10 Ω: This is one of the most common SMT resistors used for filtering, voltage division, and other low-power applications

2 1k Ω: This type of resistor is commonly used in switching power supplies, motor control, and other high current applications

3 10k Ω: The SMT resistor with this resistance value is suitable for medium current applications, such as sensor signal processing

4 100k Ω: This type of resistor is mainly used for current limiting, protecting other components from the influence of excessive current

5 1M Ω: SMT resistors with this resistance value are commonly used in precision instruments and testing equipment

6 10M Ω: This type of resistor is used for high current applications such as power filtering and motor drive

7 100M Ω: This is a larger SMT resistor used in applications that require high current resistance

8 1k Ω to 10M Ω: SMT resistors with these resistance values are commonly used in matching networks in integrated circuits to achieve accurate impedance matching

2、 The application of SMT resistors

SMT resistors have a wide range of applications in various electronic devices. The following are some main application scenarios:

1 Current limiting: Chip resistors can be used to limit current and protect other components from the influence of excessive current. For example, in LED drivers, chip resistors can be used to limit current and prevent LED overheating or damage

2 Partial voltage: SMT resistors can be used to reduce voltage, making the circuit easier to operate. For example, in a charger, patch resistors can be used to share the voltage of the battery to protect the charger and battery from the impact of high voltage

3 Filtering: SMT resistors can be used to filter high-frequency noise and improve circuit stability. For example, in a radio receiver, patch resistors can be used to filter out high-frequency noise and improve signal quality

4 Sensor signal processing: SMT resistors can be used to adjust the strength of the sensor output signal, making it more suitable for subsequent circuit operation. For example, in temperature sensors, patch resistors can be used to adjust the resistance value of the output signal in order to convert it into a level signal that is easy to read

5 Protective component: SMT resistors can be used as protective components to protect other components from the influence of high voltage or current. For example, in power circuits, SMT resistors can be used to protect sensitive semiconductor components from the influence of abnormal voltages

Understanding the commonly used SMT resistance values and their applications is crucial for electronic engineers. By selecting and using SMT resistors correctly, the stability and reliability of the circuit can be ensured, and the performance and service life of the equipment can be improved. I hope this article can provide you with useful information about SMT resistors