Differences and advantages and disadvantages between chip resistors and in-line resistors
What are the differences between chip resistors and plug-in resistors? First of all, chip resistors are also called chip resistors. It is a form of metallic glass uranium resistor. Its resistor body is made of high-reliability ruthenium series glass uranium material after high temperature sintering. It is characterized by small size, light weight, high precision, and low temperature. Drift, stability and high frequency performance are good. It is widely used in computer peripherals and power supplies, home appliances, lighting, battery packs, power supplies, etc. It can be said that the application is very wide. Generally speaking, as long as it is a charged electronic device, there will be chip resistors.
Secondly, in-line resistors are also called resistors. In normal life, they are generally referred to as resistors, which are a kind of current-limiting components. It means that the resistance of the resistor is fixed after the resistor is connected to the product circuit. Generally, there are two pins. The function of these two pins is to limit the current of the branch connected through it. The common types of this kind of in-line resistance are varistor, thermistor, photoresistor, humidity sensitive resistor, etc., all of which are in-line resistance. The general application lies in a wide range of applications in the fields of consumer electronics, computers and telecommunications. It is understood that the increase in resistance technology and the increase in the use of high-performance resistance research and development systems have promoted the growth of the in-line resistance market.
The difference between chip resistors and in-line resistors One. Chip resistors
(1) Small size, light weight, easy to store and transport
The commonly used chip resistors 0805 and 0603 packages are much smaller than plug-in resistors. Regardless of the circuit current, the storage space of dozens of plug-in resistors can place thousands to tens of thousands of chip resistors. This volume greatly saves space in circuit design and facilitates the operability of other aspects of the product. Greatly improved.
(2) SMD resistors are easy to weld, disassemble and disassemble
SMD resistors do not need via holes, use less tin, and are easy to disassemble. Even if components with one or two hundred pins are disassembled several times, the circuit board will not be damaged.
(3) Strong stability and high reliability
The stability of the chip resistor is very good, which will greatly improve the stability and reliability of the circuit, reduce the production cost, and increase the productivity.
Two, plug-in resistance
(1) Large volume and large current
Compared with chip resistors, plug-in resistors are larger in volume, but they can withstand larger currents. The plug-in resistors have more stable performance than patches, and are suitable for working in some harsh environments. Generally used for high-power product applications.
(2) The solder is stable and not easy to fall off
Via holes are needed, and the soldering area is large, stable, and stable. There is no need to worry about falling off during use, causing the circuit to be unstable.
Advantages and disadvantages of chip resistors and in-line resistors Advantages of chip resistors
Small size, light weight, easy to store and mail. The volume and weight of chip resistors are only about 1/10 of that of traditional plug-in components. Generally, after using SMT, the volume of electronic products is reduced by 40% to 60%, and the weight is reduced by 60% to 80%. High reliability and strong anti-vibration ability. The defect rate of solder joints is low. Good high frequency characteristics. Reduce electromagnetic and radio frequency interference. It is easy to realize automation and improve production efficiency. Reduce costs by 30%~50%. Save materials, energy, equipment, manpower and time;
For example, the commonly used chip resistor 0805 package or 0603 package is much smaller than the in-line resistor we used before. A bag of dozens of in-line resistors can be filled, but it is enough to hold thousands or even tens of thousands of them if replaced with chip resistors. Of course, this is without considering the maximum current it can withstand;
Disadvantages of chip resistors
The firmness is poor, the requirements for production equipment are relatively high, and the requirements for the quality of the devices are relatively high. For example, in machine production, chip resistors generally require the components to be shipped within one year, otherwise the components will be stored for too long, resulting in oxidation of the pads and poor soldering, especially the smaller the package, the higher the quality requirements;
Advantages of in-line resistance
The advantage of in-line resistors over chip resistors is that the welding process is not very demanding, the heat dissipation is relatively better, and the power is higher;