Resistance: A regulator in the electronic world that acts as an AC resistor and DC resistor in circuits, ensuring that each circuit and electronic component receives the corresponding circuit and voltage, thus making the circuit safer and more reliable.
Resistance, as a fundamental physical quantity in electricity, is a measure of the obstructive effect encountered by current passing through a conductor. This hindering effect enables the control of current in the circuit, thereby achieving the normal operation of various electronic devices. The unit of resistance is ohms (Ω), and its magnitude mainly depends on factors such as the material, length, cross-sectional area, and temperature of the conductor.
Classification and Product Application of Resistors
Resistors can be classified into various types based on their materials, structures, and working principles, each with its specific application scenarios.
Fixed resistance: It has a fixed resistance value and will not change due to changes in current or voltage. Common fixed resistors include carbon film resistors, metal film resistors, and metal oxide film resistors. Carbon film resistors are inexpensive, stable in performance, and widely used in fields such as home appliances and communication equipment; Metal film resistors are commonly used in high-precision measurement circuits due to their high precision and stability; Metal oxide film resistors are suitable for high temperature environments.
Variable resistor: The resistance value can be changed by adjusting the resistance element. Common variable resistors include potentiometers, varistors, and photoresistors. Potentiometers are commonly used for volume control, brightness adjustment, and other applications; Varistors can be used to measure the magnitude of pressure or force; Photoresistors can be used in devices such as photosensitive sensors and light controlled switches.
Temperature sensing resistor: measures temperature based on the temperature coefficient of the resistive material. Common temperature sensing resistors include platinum resistors and thermistors. Platinum resistors are commonly used in fields such as medical equipment and industrial automation; Thermistors are widely used in temperature measurement, constant temperature control, and other applications.
Power resistor: a resistor that can withstand high power, has a large size and heat dissipation capacity, and is suitable for high-power circuits, motor drives, and other fields.
High frequency resistor: a resistor specifically used in high-frequency circuits, with a small size and inductance, which can effectively reduce interference and losses in the circuit.
Anti sulfurization resistor: mainly used for product applications in harsh and humid environments to prevent sulfur dioxide from affecting the stability of the resistor itself. For example, mining lamps, mining lamp power supplies, LEDs, automobiles, and other related products.
Surge resistance: It is mainly a resistance designed to deal with the impact of surge generated during circuit switching or abnormal situations. For example, high-power power supplies, LED lights, rectifiers, and other products.
High voltage resistance: a product that must be used in specific boost circuits or high-voltage circuits. And this type of ultra-high voltage product also needs to meet safety certifications such as UL and VDE. For example, the use of energy storage, household appliances, and other products.
Alloy resistor: a resistor mainly made of alloy materials. Mainly collecting current in the circuit, it is also known as using resistors. Mainly used for devices that require fast charging and discharging, as well as current sampling circuits. For example: power supply, frequency converter, car lights, energy storage, BMS battery management system, etc.
Bare copper shunt resistor. It is also a type of alloy resistor that has higher power and excessive current characteristics than ordinary alloy resistors. Widely used in BMS battery management systems (mainly focused on high current battery packs, such as household energy storage, commercial energy storage, outdoor energy storage, motors, agricultural drones, food delivery vehicles and other mechanical equipment)
The function of resistance
Resistors have a wide range of applications in electronic circuits, mainly including the following aspects:
Current limiting: By connecting resistors in series, the current in the circuit can be limited, protecting other components from damage caused by excessive current.
Voltage division: Series resistors can distribute the power supply voltage to different positions, providing suitable operating voltage for different circuit parts.
Energy dissipation: Resistors convert electrical energy into thermal energy, so resistors usually have a certain power rating. This energy dissipation characteristic makes resistors widely used in heating devices such as electric furnaces and rice cookers.
Filtering: Combined with capacitors to form a filtering circuit, smoothing voltage or current fluctuations, reducing noise and interference.
Matching: In some circuits, such as signal transmission, amplifiers, etc., resistors are used to achieve impedance matching to improve signal transmission efficiency and reduce reflection.
Characteristics of Resistance
The characteristics of resistance mainly include the following aspects:
Temperature coefficient: Most resistors experience a change in resistance value when the temperature changes. The smaller the temperature coefficient, the less significant the change in resistance with temperature.
Accuracy and stability: The accuracy and stability of resistors determine their application range in high-precision circuits. Metal film resistors and resistors made of certain special materials have high accuracy and stability.
Power rating: The power rating of a resistor determines the maximum power it can withstand. Beyond this value, the resistor may be damaged.
Brand of resistor
There are many well-known brands in the resistor market, among which some representative brands include:
Resistors are one of the basic components in electronic circuits, and there are many brands of them. Here are some well-known resistor brands:
YAGEO Guoju: Established in 1977, it is a leading global supplier of passive component services, specializing in the production of chip resistors and laminated ceramic capacitors. Its products are widely used in the fields of mobile phones, tablets, industrial/power, renewable energy, medical and automotive industries.
UNI-ROYAL, founded in Taiwan in 1978, is a leader in the global chip resistor and plug-in resistor industry. It has a well-established R&D team and manufacturing factory, and its products are distributed worldwide.
Huaxin Technology PSA: Founded in Taiwan in 1992, it provides one-stop product solutions and a fast supply platform. Its product line is rich, including MLCC, chip resistors, RF components, RF antennas, circular capacitors, etc.
Fenghua High Tech FH: Established in 1984, we specialize in the research and production of high-end new electronic components, electronic materials, and electronic specialized equipment, as well as other electronic information basic products. Our products include capacitors, resistors, inductors, semiconductor equipment, and integrated circuits.
Dayi Technology: Established in Taiwan in 1989, it is a global supplier of SMD thick film chip resistors, manufacturing high-quality components with advanced equipment and technology.
VISHAY: Founded in the United States in 1962, it is a large-scale global manufacturer of discrete semiconductors and passive electronic components, providing diodes, various transistors, optoelectronic products, and passive components.
KOA: Established in Japan in 1940, a globally renowned supplier of electronic passive components, our main products include surface mount resistors, low resistance/power shunt resistors, etc.
ROHM: Founded in Japan in 1958, ROHM is a globally renowned semiconductor manufacturer that provides products such as ICs, discrete components, optical components, passive components, modules, and semiconductor applications.
Panasonic Electromechanical: Belonging to Panasonic Group, with rich experience and technology in the field of electronics, we provide comprehensive overall solutions. Our business covers electronic components, automotive electronics, FA machines, control machines, electronic materials, etc.
BOURNS: Founded in 1945 in the United States, it is a world-renowned electronic component manufacturer and one of the earliest companies to produce fine adjustment potentiometers. Its main products include variable resistors, connectors, encoders, diodes, sensors, and more.
Viking Guangjie: Founded in Taiwan, China, China, it is mainly an early product of precision resistance, anti vulcanization resistance, alloy resistance, car gauge resistance, etc. It is an earlier resistor manufacturer in Taiwan, China, China.
Ever Ohms Day 2: Focusing on the research and production of special resistors. For example, anti vulcanization resistance, car gauge resistance, film precision resistance, metal film resistance, fuse fuse resistance, alloy resistance, high voltage resistance, large rear patch resistance, ultra-high power resistance, etc., is the first enterprise in Taiwan, China, China to develop and mass produce patch resistance.
Yineng Ellon: Focused on high-end resistor manufacturers for special products. There are mainly high-power anti sulfurization resistors, high-power anti surge resistors, alloy resistors, metal film precision resistors, alloy sampling resistors, and special product resistors such as wide electrodes.
Huade Walter: Suzhou Huade Electronics mainly produces alloy resistors, metal foil resistors, and bare copper shunt resistors.
These brands have rich experience and advanced technology in the research and development, production, and sales of resistors, making important contributions to the development of the global electronics industry.
In summary, as an important regulator in the electronic world, resistors play a crucial role in the normal operation and implementation of various functions of electronic devices. By understanding its classification, function, characteristics, and brand, we can better understand and apply resistors, and promote the continuous development of electronic technology.