SW3

SW3 Series Aluminum Electrolytic Capacitors: Stable and Reliable Power for Demanding Industrial Applications

At the core of modern industrial power electronics, device stability, efficiency, and lifespan are directly linked to the operational effectiveness and safety of the entire system. Whether it's variable-frequency drives, industrial automation equipment, or high-power switching power supplies, they all require a "heart" capable of operating reliably in harsh environments with high temperatures and high ripple currents. YMIN's SW3 Series aluminum electrolytic capacitors are high-performance components meticulously crafted to meet these stringent requirements. With their exceptional high-temperature tolerance, long lifespan, and robust ripple current handling capabilities, they have become a trusted power solution for engineers.

I. Product Positioning and Core Features: Defining Industrial-Grade Standards

The SW3 Series is an industrial-grade, high-voltage, high-capacity aluminum electrolytic capacitor designed to withstand the challenges of industrial environments. Compared to standard consumer-grade capacitors, the SW3 Series sets high standards in the following aspects:

1. Superior High-Temperature Performance and Ultra-Long Life: This series can operate continuously in ambient temperatures up to 105°C and boasts a guaranteed rated lifespan of 3,000 hours. This means SW3 capacitors can operate stably and long-term even in high-temperature chassis, significantly reducing the risk of equipment downtime due to capacitor failure and meeting the ultimate reliability requirements of industrial applications.

2. Strong Ripple Current Capacity: Ripple current is the primary factor that causes internal heating in capacitors and reduces their lifespan. The SW3 series achieves high ripple current ratings through advanced electrode foil and electrolyte technology. The frequency and temperature correction factors provided in the product data sheet demonstrate that these factors maintain effective current handling capability even at low frequencies (e.g., 50Hz) or high temperatures, ensuring low temperature rise and efficient filtering in devices generating significant ripple current, such as inverters and frequency converters.

3. Wide Voltage and Capacitance Range: The SW3 series covers a DC voltage range of 16V to 500V and capacitance values ​​from 68μF to 47,000μF, providing engineers with a wide range of options when designing power supply circuits for various power levels. From smoothing auxiliary power supplies to high-energy buffering in main circuits, the SW3 series offers a suitable model.

4. Strict Quality Assurance and Environmental Standards: Our products fully comply with the RoHS Directive, ensuring an environmentally friendly production process. Our rigorous factory testing standards, including control of parameters such as leakage current, dissipation factor (DF), and insulation resistance, ensure that every capacitor leaving our factory is of consistent high quality.

II. In-Depth Technical Analysis: The Engineering Significance Behind the Parameters

Simply listing the parameters is not enough; understanding the engineering significance behind them is crucial.

• Leakage Current: The SW3 series' leakage current is kept to an extremely low level (≤0.01CV or 1.5mA). Low leakage current means slower self-discharge after power is removed, which is crucial for circuits that require data retention or applications that reduce standby power consumption. It also reflects the excellent quality of the dielectric oxide film.

• Dissipation Factor (tanδ or DF): This value represents the ratio of a capacitor's reactive power to its active power and is a key indicator of its losses and efficiency. The SW3 series' low DF value indicates reduced energy loss and heat generation at high frequencies, resulting in higher efficiency.

• Endurance Testing: After 3000 hours of accelerated life testing at 105°C and rated voltage, the SW3 capacitor's capacitance change rate, DF value, and leakage current were all limited to extremely small ranges. This simulates years of actual operating conditions and verifies its exceptionally long service life and stability.

III. Practical Application Scenarios: Empowering Various Industries

The SW3 series' exceptional characteristics have made it a shining example in several key industrial sectors:

1. Industrial Inverters and Servo Drives: This is the core application area of ​​the SW3 series. In inverters, it primarily supports the DC bus, smoothes the rectified voltage, and supplies high transient current to the IGBT switches. Its high ripple current capability and high-temperature stability ensure that the inverter can provide stable and reliable DC voltage even under conditions of frequent motor starts and stops and drastic load fluctuations, making it a key component for improving equipment efficiency and reliability.

2. Uninterruptible Power Supplies (UPS) and Industrial Power Supplies: In high-power UPSs and industrial switching power supplies, SW3 capacitors are used for output filtering and energy buffering. Their high capacitance and low ESR (equivalent series resistance, indirectly reflected in the ripple current parameter) effectively suppress output noise, provide pure DC power, and protect sensitive downstream electronic equipment.

3. New Energy Applications: In new energy equipment such as photovoltaic inverters and wind turbine converters, the ambient temperature fluctuates greatly, placing extremely high demands on component reliability. The SW3 series' high-temperature lifespan and stable electrical performance make it suitable for the harsh environments of outdoor cabinets, ensuring the stable conversion of green energy.

4. Welding Equipment and Electromagnetic Heating Systems: These devices operate with high currents and frequently operate in a pulsed state. The SW3 capacitor's strong peak current absorption capacity and durability ensure consistent welding quality and stable operation of the heating system.

Fourth Design Advantage: Easy Installation and Secure Connection

• Automated Installation: Pin terminals are ideal for large-scale, efficient PCB assembly using surface-mount (SMT) or automated insertion machines, reducing production costs.

• Strong Mechanical Connection: The snap-on design of the terminals ensures a secure fit after insertion into the PCB, offering strong resistance to vibration and shock, making them ideal for use in vibration-prone environments such as machine tools and rail transit.

• Space Saving: Compared to bolt-on capacitors, the more compact design facilitates miniaturization of power modules.

V. Choose YMIN SW3, Choose Lasting Reliability

As a company specializing in capacitor technology, YMIN's SW3 series embodies its extensive expertise in materials science, process design, and quality control. From carefully selected high-purity electrode foil to an optimized, long-lasting electrolyte solution, to the fully automated sealing and packaging process, every step is designed to provide customers with a reliable, maintenance-free product.

In summary, YMIN's SW3 series aluminum electrolytic capacitors are more than just simple electronic components; they serve as the foundation for high-performance power electronics in the Industry 4.0 era. With their robust temperature resistance, long service life, and powerful power handling capabilities, they perfectly address the core challenges of industrial applications. When you design the next generation of inverters, power systems, or any high-reliability power electronic equipment, choosing the SW3 series means you’ve chosen a powerful “heart” that continuously beats for stable operation.