EH3

YMIN EH3 Series Bolt-on Aluminum Electrolytic Capacitors: An Economical Solution for Industrial Power Systems

In industrial power electronics, the selection of high-voltage, high-capacity capacitors often requires a balance between performance, lifespan, and cost. For applications where lifespan requirements are less stringent but reliable high-voltage performance is still required, the YMIN EH3 series bolt-on aluminum electrolytic capacitors offer a highly attractive solution. While maintaining the high performance characteristics of the EH series, this product achieves a more competitive price-performance ratio through an optimized design, making it an ideal choice for medium-demand industrial applications.

Product Positioning and Core Features

The EH3 series bolt-on aluminum electrolytic capacitors are designed to provide users with optimal economic benefits while ensuring basic performance requirements. With a rated voltage range of 550V to 630V and capacities ranging from 1000μF to 10,000μF, this series fully meets the basic high-voltage, high-capacity capacitor requirements of most industrial equipment. Its 3000-hour design life at 85°C is sufficient for many industrial applications, particularly those with short equipment replacement cycles or intermittent operation.

The most notable feature of this series is its inheritance of the high-voltage design advantages of the EH series. While a traditional 1200V DC bus typically requires three 400V capacitors connected in series, the EH3 series only requires two capacitors in series. This design not only simplifies the system structure and reduces the number of components, but more importantly, improves system reliability. Fewer series components means fewer potential points of failure, thereby increasing the MTBF (mean time between failures) of the entire power electronics system.

Technical Parameters and Performance

In terms of technical parameters, the EH3 series maintains satisfactory levels in key performance indicators. Leakage current is controlled within 1.5mA or 0.01CV, ensuring the capacitor's long-term stability. The loss tangent does not exceed 0.3 at 20°C and 120Hz, demonstrating the product's excellent electrical performance. In particular, its low-temperature performance, with a capacity retention rate of at least 50% at -25°C, ensures reliable operation in harsh environments.

Ripple current handling is a key performance indicator for power capacitors. Taking the EH32L103ANNGG26M8 model as an example, its rated ripple current reaches 28,980 mA, fully meeting the requirements of most industrial applications. The product's frequency correction factor shows that capacitor performance is further improved at higher frequencies, reaching a correction factor of 1.4 at 10 kHz, providing additional performance margin for high-frequency applications.

Structural Design and Safety Features

The EH3 series utilizes a classic screw-type terminal design, offering a variety of terminal sizes from M5 to M8, with a maximum torque of 7.5 N·m. This design ensures reliable connections under high current conditions and facilitates installation and maintenance. The explosion-proof housing safely relieves pressure in the event of an abnormal increase in internal pressure, effectively preventing the possibility of housing rupture.

In terms of insulation performance, the insulation voltage between the terminal and the housing reaches 2000V AC, far exceeding typical application requirements and providing sufficient assurance for system safety. The insulation resistance is at least 100 MΩ, ensuring reliable isolation in harsh environments such as humidity. The design of these safety features demonstrates a deep understanding of the actual needs of industrial applications.

Application Scenario Analysis

The EH3 series is particularly well-suited for cost-sensitive applications that are unwilling to compromise on basic performance. In the industrial inverter sector, particularly for applications with operating hours of no more than eight hours per day, the EH3 series' 3,000-hour lifespan fully meets 3-5 years of use. Compared to products with higher lifespan ratings, this option significantly reduces equipment costs while maintaining basic reliability.

The EH3 series also demonstrates excellent suitability in commercial-grade UPS systems. These systems generally do not require the same continuous operation as industrial-grade systems, but the basic performance requirements for high-voltage, high-capacity capacitors still exist. While meeting these basic requirements, the EH3 series' cost-effectiveness provides UPS manufacturers with a more competitive solution.

Industrial welding equipment is another typical application. This type of equipment typically has short operating cycles but requires high peak current capacity from capacitors. The EH3 series' excellent ripple current handling characteristics make it well-suited for this operating mode, while its cost-effectiveness helps enhance the market competitiveness of welding equipment products.

Reliability Verification and Quality Assurance

Although the EH3 series is positioned as an economical product, it does not compromise on reliability. After rigorous durability testing, the product was tested at an ambient temperature of 85°C, applying the rated voltage and ripple current. After 3000 hours of continuous operation, the capacitance change did not exceed ±20%, the loss tangent did not exceed 200% of the initial specification, and the leakage current remained within the initial specification. These test results demonstrate the product's reliability throughout its design lifecycle.

In terms of production, YMIN utilizes mature manufacturing processes and a rigorous quality control system. From the etching of the aluminum foil to the formulation of the electrolyte, from the winding of the core package to the final sealing and packaging, every step is carefully designed and strictly controlled. While certain aspects have been optimized compared to the higher-end EH6 series to control costs, the fundamental quality standards have not been compromised.

Market Positioning and Value Analysis

The EH3 series has a clear market positioning: providing a cost-effective solution for applications requiring high-voltage, high-capacity capacitors but not requiring extremely stringent lifespan requirements. This positioning makes it highly competitive in multiple market segments.

From a user value perspective, choosing the EH3 series means optimizing costs while ensuring essential performance. For equipment manufacturers, this choice not only reduces material costs but also potentially helps gain market share through more competitive pricing. For end users, while the product's design life is relatively short, it's sufficient for many applications, and its lower price tag may still offer advantages in terms of lifecycle costs.

The EH3 series' economic advantages are particularly pronounced in industries with short equipment replacement cycles or in applications where the equipment itself is not particularly valuable. These applications typically don't pay the extra cost for a longer lifespan, and the EH3 series' positioning precisely meets these needs.

Technology Trends and Future Outlook

As industrial equipment becomes increasingly diverse, the demand for components is also becoming more segmented. The EH3 series' design philosophy of optimizing products for specific needs represents a new direction for the component industry. In the future, we may see more products specifically optimized for different application scenarios.

In terms of technology, while the EH3 series is currently positioned as an economical product, its performance parameters are expected to be further enhanced with advancements in material technology and manufacturing processes. For example, new products may be introduced in the future that extend service life while maintaining current cost levels. Such technological advancements will further enhance the product's market competitiveness.

The YMIN EH3 series bolt-on aluminum electrolytic capacitors, through precise market positioning and product design, strike an optimal balance between performance, lifespan, and cost. This product not only meets the needs of specific application scenarios, but its design philosophy also provides a valuable reference for the development of the industrial component industry. As industrial application scenarios continue to expand and segment, these products optimized for specific needs will play an increasingly important role.