A kind of Military-Grade Tantalum Capacitors: wet tantalum capacitor

2024-10-26

Wet tantalum capacitor

Military-grade tantalum capacitors due to their small size, large capacity, high stability, low leakage, etc characteristic, have widely used on various application, like Military communications, petrol well measurement...

Especially the wet tantalum capacitors. Comparing to solid tantalum technologies e.g. (MnO2 or polymer electrolyte), wet tantalum capacitors exhibit a higher surge current capability with a higher breakdown voltage (BDV) close to their dielectric formation voltage.

We will introduce you the details of the military tantalum capacitors, from their history, advantages, shortcoming and HONGDA Capacitors’ wet tantalum capacitors.

Development History:

Early Exploration Stage (1950s - 1970s): Tantalum capacitors were first developed by Bell Laboratories in the United States in the 1950s. In Japan, the development of tantalum capacitors began in the late 1950s. In 1956, the first wet tantalum foil capacitor appeared and was applied to transistor transmitters. At this time, solid tantalum capacitors mainly used sintered tantalum anode blocks as solid electrolyte capacitors and began to be initially applied in fields such as telephone equipment and electronic computers. However, although solid tantalum capacitors had large capacitance at that time, they were extremely expensive and there were also problems such as being prone to moisture absorption.

Rapid Development Stage (1970s - 1990s): To meet the market's demand for cheaper and more compact tantalum capacitors and solve the problem of moisture absorption, researchers and enterprises continuously improved technology. Through methods such as improving the coverage ratio of manganese dioxide, improving the oxidation film technology, and adopting resin impregnation, resin-impregnated tantalum capacitors emerged. This new type of tantalum capacitor not only significantly reduces the price but also has a more compact structure, showing an "explosive" development in the market. By 1977, in the entire capacitor market in Japan, the sales proportion of resin-impregnated tantalum capacitors reached 88%. In the 1980s, with the increasing demand for miniaturization of electronic equipment, enterprises began to devote themselves to researching and developing miniaturized tantalum capacitors. For example, in 1981, NEC Corporation developed the R series of small tantalum capacitors, known as the AV series in Japan. Due to its structure suitable for miniaturization requirements, it was welcomed by the market and widely used in small devices such as tape recorders and video recorders.

Technology Maturation and Innovation Stage (1990s - early 21st century): During this period, tantalum capacitors continuously matured in technology, and enterprises continued to make efforts in improving capacitor capacity, reducing costs, and improving reliability. On the one hand, by using finer tantalum powder and optimizing the generation technology of the oxidation film, the performance of tantalum capacitors is continuously improved. On the other hand, as the requirements for capacitors from electronic equipment become higher and higher, the advantages of tantalum capacitors in terms of high temperature resistance and anti-interference are further highlighted, making them widely used in fields such as military, aerospace, and other fields with extremely high requirements for the performance of electronic components. For example, in high-end equipment such as artificial satellites and missile guidance systems, tantalum capacitors have become one of the key electronic components.

Accelerated Localization Stage (early 21st century - present): Entering the 21st century, with the continuous strengthening of China's national defense construction and the rapid development of the electronic information industry, the demand for military-grade tantalum capacitors is increasing day by day. Domestic enterprises have increased their investment in the research and development of tantalum capacitor technology and made important breakthroughs in the localization of high-end tantalum capacitors.Hongda Capacitors,https://www.hongdacapacitors.com/, after years of technological accumulation and innovation, can not only produce tantalum capacitor products that meet domestic military needs but also continuously improve product performance and quality, gradually occupying an important position in the domestic market. At the same time, domestic enterprises are also actively expanding the international market and competing with internationally renowned enterprises.

Wet tantalum capacitor Advantages:

High Performance: Designed to meet the rigorous demands of military applications, these capacitors provide exceptional precision, stability, and reliability.

Strong Anti-Interference: Excellent resistance to electromagnetic and radio frequency interference ensures the reliable operation of electronic equipment in challenging environments.

Long Service Life: When properly used and maintained, military-grade tantalum capacitors offer an extended service life, minimizing maintenance costs and reducing equipment downtime.

High Safety Standards: Featuring robust explosion-proof characteristics, these capacitors significantly reduce the risk of safety incidents, including explosions during failures.

While they also meet the shortcomings, like high cost, due to its strict quality requirements and special manufacturing processes, military-grade tantalum capacitors have a relatively high cost.

Also Limited voltage resistance and sensitive to surge current etc.

HONGDA Capacitors, is the leading manufacturer of capacitors, inductors.

certified through ISO9001:2015 and IATF16949, with over 20 years of experience.

we have grown to become a leading global supplier in the passive components market. Our parts are widely used on consumer, industrial, telecommunications, and medical markets,and military applications. 

Hongda Military Products include military tantalum capacitors, military MLCC, military inductors, etc.

Wet tantalum capacitors includes:

CAK86 Series High Frequency Military Wet Tantalum Capacitors

CA351 Series Hermetically Military Wet Tantalum Capacitors

CA53 Series 200'C Hermetically Military Wet Tantalum Capacitors

CA30 Series Military Wet Tantalum Capacitors

CA82 series (175°C)Hermetically Military Wet Tantalum Capacitors: Cross  Vishay wet tantalum capacitors 738D series.

CA35 series (125°C)Hermetically Military Wet Tantalum Capacitors

CA Series Metal case, fully sealed solid tantalum capacitors

CAK36S2W Series High Energy Tantalum Hybrid Capacitors: cross Evan wet tanalum capacitors TDD2-SM/ TDD3-SM/ THS3-SM series.

Etc.

They are widely used on : nuclear station, petroleum well measurement, power electronics,

telecommunications, medical devices, power supply, military, aerospace, aviation, etc applications

If you have any demand, or need alternative from us, pls contact sandy@hongdacap.com.hk Mobile: +86 134 1426 6962((Wechat/Whatsapp)

You will get our positive response and good support.