1. Energy storage function and energy control

High capacitance and energy storage: Electronic detonators need to release a large amount of energy

 in a very short period of time to detonate insensitive agents. Surface mount aluminum electrolytic capacitors 

have a larger capacitance (such as 100 μ F/25 V) and can store more charges. According to the formula 

C × Δ U=I × Δ t, the larger the capacitance value, the more flexible the delay time setting, and the higher 

the ignition reliability.

Structural adaptability: The cylindrical shell of electronic detonators requires a compact capacitor shape. 

Surface mount aluminum electrolytic capacitors (such as Φ 5 × 8 mm) are more suitable for tube shell layout 

than tantalum capacitors, and can reduce the tube shell radius and optimize assembly design.

2. Performance advantage comparison

Low ESR and high overcurrent capability: Equivalent series resistance (ESR) directly affects the instantaneous 

current intensity during detonation. The ESR (usually below 1.6 Ω) of solid-state aluminum electrolytic capacitors 

is significantly better than that of tantalum capacitors, reducing energy loss and ensuring that the bridge wire 

obtains sufficient energy. For example, experiments have shown that a high ESR of tantalum capacitors 

can lead to 43% energy loss, while controlling the ESR of aluminum electrolytic capacitors within a reasonable 

range can improve the success rate of detonation.

Low leakage current and high temperature stability: The leakage current (<3 μ A) of surface mount aluminum 

electrolytic capacitors at high temperatures (55 ℃) is much lower than that of tantalum capacitors (>10 μ A), 

avoiding the risk of explosion rejection caused by energy loss during the delay phase. Its solid-state electrolyte 

design also avoids the problem of liquid electrolyte drying up, extending its service life.

3. Safety and reliability

Adaptability of insensitive agents: insensitive agents require high voltage and high energy to detonate. Surface 

mounted aluminum electrolytic capacitors have strong voltage resistance (such as 25 V) and overcurrent ability, 

while tantalum capacitors have insufficient voltage resistance and are prone to combustion when they fail, posing 

a safety hazard.

Environmental adaptability: Surface mount aluminum electrolytic capacitors support a wide temperature range 

(-40 ℃~125 ℃) and anti vibration design, suitable for complex environments such as mines and underwater.

4. Supply chain and cost advantages

Localization substitution: Domestic manufacturers such as Fulong's surface mount aluminum electrolytic capacitors 

have achieved mass production, with a shorter supply cycle (compared to the six-month cycle of imported 

tantalum capacitors) and a cost reduction of 30% to 50%.

Product Consistency: Through automated production lines and strict quality control, the consistency of capacitance 

parameters (such as capacitance value and ESR) is high, meeting the batch requirements of electronic detonator 

modules.

5. Practical application cases

Typical model: such as Fulong EFRA025BK101M0411 (100 μ F/25 V), which has been widely used in the

 electronic detonator market and verified for its stability in high-voltage detonation scenarios.

Test data: Comparative experiments show that the capacitance fluctuation of solid-state aluminum electrolytic 

capacitors is less than 5% at voltages of 16-24 V, and the high-temperature leakage current is only 1-2 μ A. 

The performance is better than that of imported tantalum capacitors.

summarize

Surface mounted aluminum electrolytic capacitors have become the mainstream choice for energy storage 

capacitors in electronic detonators due to their high energy density, low loss, high safety, and supply chain 

advantages. Its technical parameters are highly matched with the requirements of detonators, promoting 

the development of the civil explosive industry towards intelligence and safety. In the future, with further 

optimization of solid-state electrolysis technology, its reliability in extreme environments is expected to 

be further improved.

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