The withstand voltage of surface mount aluminum electrolytic capacitors refers to the working voltage

 they can withstand continuously under certain conditions. If the operating voltage on the circuit exceeds

 the rated voltage of the surface mount aluminum electrolytic capacitor, the insulation medium inside the

 capacitor may be broken down, which may slightly affect the short circuit or leakage of electronic products, 

and in severe cases, it may directly burn out the entire circuit board. So, the working voltage of surface mount

 aluminum electrolytic capacitors cannot exceed their rated voltage, which not only extends their lifespan but

 also ensures the reliable operation of the circuit.

When purchasing or using surface mount aluminum electrolytic capacitors, it is necessary to conduct

 this withstand voltage test on them. The performance of surface mount aluminum electrolytic capacitors 

needs to be tested for leakage current, which is an important indicator of their performance. The leakage 

current of surface mount aluminum electrolytic capacitors is closely related to voltage. The leakage current 

increases with the increase of operating voltage. When the working voltage approaches the enabling 

voltage of the aluminum foil on the anode, the leakage current will sharply increase. By testing the leakage 

current of aluminum surface mount aluminum electrolytic capacitors, we can calculate their ultimate

 withstand voltage and rated voltage. This relationship has direct reference significance for us to determine 

the withstand voltage of surface mount aluminum electrolytic capacitors in circuits.

Based on this principle, we can simply design an experiment.

Two transformers, TI,T2。 Same model. Back to back docking, providing two sets of high and low voltage 

power supplies for isolation purposes. After rectification and filtering, the low-voltage power supply has 

RI, DW1, Q1, RaL~RaL form a constant current source with adjustable current. After rectification and

 filtering, the high-voltage power supply is divided into Rb1~Rb10 and DW2, and Q2 outputs an adjustable 

DC voltage. When using, select the appropriate voltage Uc and current Jc, and connect the tested surface 

mounted aluminum electrolytic capacitor to the points Cxa and Cxb. At this time, you will see the pointer 

of the voltmeter slowly deflect and stop after reaching a certain position. The voltage pointed by the pointer 

is the withstand voltage that the surface mounted aluminum electrolytic capacitor can withstand when

 the leakage current is 1c.

The band switches K3 and K4 (each with 11 positions) are respectively the selection switches for testing

 voltage and current (i.e. leakage current).

After testing, you will find that the larger the capacity of the surface mounted aluminum electrolytic

capacitor, the higher the leakage current obtained from the test.

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