Choosing the appropriate capacitor is a key step in ensuring the stable operation of electronic circuits. Here are some detailed selection methods and parameters to pay attention to:

1、 Clarify circuit requirements

Firstly, it is necessary to clarify the specific requirements of the circuit, including the functions of the required capacitors (such as filtering, coupling, energy storage, etc.), operating frequency, voltage range, etc. This will provide a basic basis for selecting suitable capacitors.

2、 Focus on key parameters

1. * * Capacity * *:

-Capacity is the ability of a capacitor to store charge, measured in Farads (F), but more commonly used units are microfarads (uF), nanofarads (nF), and picofarads (pF).

-Select the appropriate capacitance value according to the circuit requirements. An excessively large capacitance value may increase costs and occupy more space, while an excessively small capacitance value may not meet circuit requirements.

2. Voltage Rating:

-Voltage resistance refers to the maximum voltage that a capacitor can safely withstand. The selected withstand voltage value should be greater than or equal to the maximum voltage that may occur in the circuit to ensure the safe and stable operation of the capacitor.

3. * * Tolerance * *:

-The error range represents the allowable deviation between the actual capacity and the nominal capacity of a capacitor. Select the appropriate error range based on the requirements of the circuit for capacitor accuracy. High precision circuits require the selection of capacitors with smaller error ranges.

4. * * Temperature Coefficient * *:

-The temperature coefficient represents the degree to which the capacitance of a capacitor changes with temperature. Select capacitors with lower temperature coefficients according to the working environment of the circuit to ensure the stability of capacitance values under different temperature conditions.

5. Equivalent series resistance (ESR):

-ESR is the value of the equivalent series resistance inside a capacitor, which affects the loss and temperature rise of the capacitor. Choosing capacitors with lower ESR values can reduce energy loss and temperature rise in the circuit.

6. * * Frequency response * *:

-For circuits that require operation at high frequencies or specific frequencies, capacitors suitable for that frequency need to be selected. The performance of different types of capacitors may vary at high frequencies, and suitable capacitors need to be selected according to circuit requirements.

3、 Consider the type of capacitor

Select the appropriate capacitor type based on circuit requirements. Common types of capacitors include ceramic capacitors, electrolytic capacitors, tantalum capacitors, film capacitors, etc. Each type of capacitor has its unique performance characteristics and applicable range:

-Ceramic capacitors have good stability and accuracy, suitable for high-frequency circuits and applications that require high precision.

-Electrolytic capacitor: Large capacity but poor stability, commonly used for power filtering and low-frequency circuits.

-Tantalum capacitor: Small in size and large in capacity, suitable for use in miniaturized circuits and high-frequency circuits.

-Thin film capacitor: Non polarized, stable, suitable for analog signal interconnection and power supply noise bypass.

4、 Consider other factors

1. * * Packaging Type * *: Choose the appropriate packaging type based on the layout and installation requirements of the circuit board. Common packaging types include surface mount (SMD), plug-in (DIP), etc.

2. * * Life and reliability * *: Consider the life and reliability of capacitors, especially for circuits that require long-term operation. Choosing a capacitor manufacturer with a good brand reputation and high quality can improve the reliability of capacitors.

3. * * Cost and availability * *: Consider the cost and availability of capacitors while meeting circuit requirements. Balance the relationship between cost, performance, and availability, and choose the capacitor with the highest cost-effectiveness.

4. The supplier's service and delivery time are in line with the current business status of the company.

5、 Summary

Choosing the appropriate capacitor requires comprehensive consideration of multiple factors such as circuit requirements, key parameters, capacitor type, packaging type, lifespan and reliability, as well as cost and availability. By carefully analyzing and comparing the performance characteristics and application scope of different capacitors, suitable capacitors can be selected for the circuit to ensure stable operation and reliable performance.

About Us

Guangdong Fulong Electronic Technology Co., Ltd. is a private high-tech enterprise specializing in the research and development, manufacturing, and sales of aluminum electrolytic capacitors, certified by IATF16949，ISO9001, ISO14001, and ISO45001. The company has a building area of 17000 square meters and more than 50 automated production lines; The total investment is 50 million yuan (RMB), with more than 100 employees, including more than 20 engineering and technical, quality management, and production management personnel. The annual production of capacitors (4 * 5.4~16 * 21.5) is about 400 million pieces; Our products are mainly sold to domestic and international markets, and we strive to promote our company's products globally.

Jiangxi Fulong Electronic Technology Co., Ltd. is a wholly-owned subsidiary of Guangdong Fulong Electronic Technology Co., Ltd. established in Hukou County, Jiangxi Province with a total investment of 500 million yuan. It has 50 fully automated production lines and an annual output of approximately 1.2 billion capacitors (4 * 5.4~16 * 21.5).

Fulong Group has an international professional core technology research and development team for aluminum electrolytic capacitors and a global sales network. Rich experience in the design, research and development, and production management of aluminum electrolytic capacitors. The R&D team follows the technical design theory of aluminum electrolytic capacitors, complies with international and domestic legal and regulatory requirements (RoHs), and adheres to the highest international quality standards

Fulong Group has high-quality and stable raw material supply partners, and key raw materials (such as aluminum foil, electrolytic paper, etc.) are selected from well-known Japanese and Korean companies (KJCC KDKNKK, etc.), ensuring reliable and stable advantages in product quality, environmental protection, safety, and energy conservation.

Fulong Group has a group of highly qualified professional technicians and management personnel who can produce various series of sheet aluminum electrolysis products according to customer requirements. The products include high-frequency low impedance, low leakage, wide temperature, extremely low impedance, non-polar, ultra long life, medium high voltage long life, high reliability and other new types of special requirements for surface mount products; At the same time, the company's products can withstand a soldering temperature of 260 ℃, meeting the lead-free reflow soldering technology required for SMT in the whole machine factory. All technical indicators of the products have reached or exceeded the international level of similar products.

While strengthening management and expanding operational scale, Fulong Group is also committed to improving its competitiveness and customer satisfaction, continuously and steadily increasing customer and social trust, continuously meeting market demand, further optimizing environmental management and expanding social contributions, and developing together with the electronics industry.

Guangdong Follon Electronic Technology Co., Ltd.

Jiangxi Follon Electronic Technology Co., Ltd.

Address: Building 3, South District, Haishan Science and Technology Park, Hukou County, Jiujiang City, Jiangxi Province

www.follon.com

Professional manufacturer of high-quality surface mount electrolytic capacitors