Alloy resistors mainly play a role in current detection in electronic circuits, and the current between them is fed back to the power chip to achieve circuit protection. Because alloy resistors play an important role in circuit detection, the product parameters of alloy resistors require very high requirements, especially in electronic circuits where the stability and reliability of product use vary with temperature and environmental changes, which is necessary to ensure the normal operation of the circuit. Below is a general explanation of the main product parameters of alloy resistors.
The main core selection parameters for alloy resistors are as follows:
1. Volume: It is necessary to choose a suitable volume for PCB and circuit use. The main common volumes of alloy resistors are as follows: 12062010251227284527, etc. With the rapid development of portable products, the trend of low power consumption, high current, and product miniaturization has led to the addition of many miniaturized products, such as 0201040206030805, which are mainly used in laptops, wearables, mobile phone batteries, etc. So there are still many products with special requirements for the product, such as frequency converters, controllers, vehicles, new energy, energy storage, etc. The products also have various needs, as well as alloy sampling resistors with special solder pads, such as 061212530105008 side electrode resistors, four terminal Kelvin alloy resistors with special solder pads and high current shunt resistors in special application fields, bare copper shunt alloy resistors such as 251239205930, as well as copper bars and bus bar jumper alloy resistors for special applications.
2. Resistance value: Resistance value is an important parameter in alloy resistors. The function of a resistor is to prevent direct current from flowing through AC, and the current flowing through the resistor is controlled by its resistance value. Therefore, in sampling circuits, the range of resistance values is extremely wide. Many times, in order to meet product needs, special resistance values need to be developed and customized. Currently, the resistance value range of alloy resistors is between 0.1mR and 4R, and different volumes will have different resistance value ranges.
3. Rated power: Rated power is also one of the very important parameters to consider in alloy resistors. The magnitude of power directly affects the stability of the product. The higher the power, the more stable the product performance, and it can also reduce the temperature rise of the resistor itself. The rated power of alloy resistors is generally based on 70 ℃ as a reference point. When the ambient temperature or usage temperature exceeds 70 ℃, the power will decay and the resistor body will heat up, thereby reducing the flow of current and affecting the stability of the circuit. The main reason that affects temperature changes is due to large quantities, one of which is the ambient temperature, but the current through the resistor itself. Therefore, rated power is very important.
4. Resistance accuracy: Alloy resistors are very important and critical components in circuits, so the general resistance accuracy is 0.1%, 0.5%, and 1%. However, resistors are bound to produce defective products during the production process, and even in situations where circuit requirements are not high, resistors with a precision of 5% will be used.
5. Temperature coefficient, also known as temperature drift value, refers to the change in resistance value with temperature. Therefore, when selecting alloy resistors, reference should also be made to the operating environment temperature and the temperature generated by the current of the product itself. At the same time, the lower the TCR value of the product itself, the smaller the change in product resistance with temperature. Therefore, the temperature characteristic of the resistor, the smaller the TCR value, the better and more stable it is.
6. Material: There are many types of materials for alloy resistors, such as manganese copper alloy, nickel copper alloy, constantan alloy, Kama alloy, iron chromium aluminum alloy, etc. These are currently widely used alloy materials, and different materials have different characteristics, such as resistivity, temperature resistance, corrosion resistance, and parasitic inductance. Choose different materials according to different usage environments.
7. Brand: The products of electronic components are constantly developing, so the brand advantage is also constantly strengthening. Big brands and universal brands are the most recommended because the market has already verified them, so there is no need to worry about product quality issues. In addition, there is industry accumulation, so providing industry solutions will be faster and more comprehensive.
Shunhai Technology is a professional distributor and solution provider of alloy resistors. The product series and models are very complete. Shunhai recommends the following brands of alloy resistors for you: Walter, Tian'er, Yageo, Viking, Liz, ELLON, Vishay, Fenghua, Dayi, Sart, Rohm, KOA, Wangquan, etc. The products are very rich.
Alloy resistors, as an important component of electronic components, play a crucial role in modern electronic devices. It occupies an irreplaceable position in the field of resistance with its unique material combination and manufacturing process. This article will provide a detailed analysis of the material properties, manufacturing processes, performance advantages, and application areas of alloy resistors, aiming to provide readers with comprehensive knowledge of alloy resistors.
Material characteristics of alloy resistors
The main material of alloy resistors is an alloy composed of multiple metal elements. These metal elements usually include copper, nickel, chromium, etc., which are mixed in specific proportions and processes to form alloy materials with excellent conductivity and stability. The characteristics of alloy resistance materials are mainly manifested in the following aspects:
Alloy resistance materials have high conductivity, which can effectively reduce resistance values and minimize power losses in circuits.
Alloy resistance materials can maintain good performance stability in harsh environments such as high temperature, low temperature, and humidity, ensuring the long-term reliable operation of circuits.
Alloy resistor materials have excellent corrosion resistance, which can resist various chemical corrosion and improve the service life of resistors.
Manufacturing process of alloy resistors
The manufacturing process of alloy resistors mainly includes material preparation, alloying, forming, heat treatment, testing, and other stages. Among them, alloying is one of the key steps, which determines the performance and quality of the resistance material. By precisely controlling the proportion of each metal element and the melting temperature, alloy materials with excellent properties can be obtained. The forming process processes the alloy material into corresponding resistor components based on the shape and size requirements of the resistor. The heat treatment process further optimizes the performance of the resistance material by controlling the temperature and time. Finally, through rigorous testing procedures, ensure that the performance indicators of each alloy resistor meet the design requirements.
Performance advantages of alloy resistors
Compared to other types of resistors, alloy resistors have the following significant performance advantages:
The resistance accuracy of alloy resistors can reach ± 0.01%, meeting the requirements of precision measurement and control.
The resistance of alloy resistors changes little with temperature and has good temperature stability, making them suitable for various environments with large temperature changes.
Alloy resistors can withstand high currents and power, making them suitable for high load circuits.
Alloy resistors have excellent corrosion resistance, wear resistance, and vibration resistance, and can operate reliably in harsh environments for a long time.
Application fields of alloy resistors
Alloy resistors are widely used in various electronic devices due to their excellent performance. Here are some typical application areas:
As communication equipment, alloys can be used in signal processing circuits and power amplification circuits, and their high precision and stability help ensure accurate transmission and processing of communication signals.
Like medical equipment, alloy resistors are used in various precision measurement and control circuits. The performance of alloy resistors in devices such as electrocardiographs and blood pressure monitors directly affects the accuracy and reliability of medical equipment.
Like industrial automation, alloy resistors are widely used in various sensors and controllers. Its high precision and stability help improve the control accuracy and operational stability of industrial equipment.
In aerospace, alloy resistors are widely used in various key circuits due to their excellent high-temperature resistance and radiation resistance. Such as satellite communication systems, missile guidance systems, etc.
