LLK

LLK Series Aluminum Electrolytic Capacitors: Infusing Long-Lasting, Reliable "Core" Power for Demanding Applications

In today's rapidly developing electronics industry, the stability, efficiency, and lifespan of power supplies directly determine the performance and market competitiveness of end products. Whether it's high-speed new energy vehicles, 24/7 cloud data centers, or intelligent industrial drive equipment, the reliability of core components—capacitors—is critically important. It's against this backdrop that YMIN's LLK series radial-leaded aluminum electrolytic capacitors were developed. With their exceptionally long lifespan, superior electrical performance, and rock-solid reliability, they are the ideal choice for high-end power supply designs and industrial applications.

1. Precise Positioning: Built for Extreme Environments

The LLK series is no ordinary aluminum electrolytic capacitor. Designed from the outset, it targets applications with extremely high lifespan and stability requirements. Its core feature is its exceptionally long service life at 105°C. What does this performance mean? It means that LLK capacitors can operate stably for years in harsh environments with high temperatures and high loads, significantly reducing equipment failure rates and ongoing maintenance costs. This series of products also fully complies with AEC-Q200 automotive standards and the RoHS directive. This is not only the highest recognition of their quality, but also enables them to successfully enter high-end markets such as automotive electronics, communications equipment, and new energy.

II. Superior Performance: An In-Depth Analysis of Core Technical Parameters

The LLK series' superior performance is reflected in its rigorous and detailed technical specifications, each of which reflects a relentless pursuit of reliability.

1. Wide Voltage and Capacity Range: The LLK series covers multiple rated voltage levels, including 160V, 200V, 250V, 400V, and 450V, and a wide range of capacitance values, meeting the diverse needs of power systems from low- to high-power systems, providing designers with flexible selection options.

2. Strict Loss and Leakage Current Control: At 25°C and 120Hz, its loss tangent remains extremely low. Crucially, leakage current control adheres to strict scientific formulas. For example, for products with a capacitance less than 1000μF, the leakage current requirement after applying the rated voltage for one minute is I ≤ 0.1CV + 40μA. This meticulous attention to detail minimizes capacitor energy loss in the circuit, improving overall power supply efficiency.

3. Excellent Durability and High-Temperature Characteristics: LLK capacitors, subjected to rated voltage and ripple current at 105°C, have undergone comprehensive life testing and demonstrated remarkable stability, with capacitance change, loss tangent, and leakage current remaining within strict tolerances. Furthermore, their excellent impedance-temperature characteristics ensure effective operation even at temperatures as low as -40°C, ensuring reliable startup and operation in cold environments.

4. Strong Ripple Current Capacity: In power supply circuits, ripple current is the primary factor that causes capacitor heating and reduces lifespan. The LLK series offers detailed frequency and temperature correction coefficients. For example, at a high frequency of 100kHz, the ripple current capability of certain capacitors can be increased to more than double that of a 120Hz reference. Combined with a temperature correction factor (e.g., a factor of 1.8 at 70°C), designers can accurately calculate the capacitor's safety margin under actual operating conditions, which is crucial for high-power density power supply design.

III. Ingenious Design: Physical Structure for Safety

The LLK series also embodies a human-centric safety philosophy in its physical structure. Capacitors with a diameter greater than 6.3mm are designed with a pressure relief device (safety valve). When the internal pressure rises rapidly due to accidental overpressure or capacitor failure, the safety valve preferentially opens at the notch on the guide pin end cap, releasing internal pressure and preventing the casing from rupturing, thereby ensuring the safety of the entire circuit system. This design is particularly important in high-voltage, high-capacity applications.

IV. Typical Application Scenarios: Empowering Various Industries

The LLK series' exceptional characteristics enable it to shine in several key areas:

• Automotive Electronics: With the increasing electrification and intelligence of vehicles, in-vehicle electronic systems (such as ECUs, battery management systems (BMSs), onboard inverters, and LED headlight drivers) place extremely high demands on component performance, including high-temperature resistance and long lifespan. The AEC-Q200-compliant LLK series provides stable and reliable filtering and energy storage for these systems, adapting to the high-temperature environment within the engine compartment.

• AI Data Servers and Communications Equipment: Data center server power supplies and base station communication power supplies require 24/7 uninterrupted operation, placing the ultimate test on the lifespan and reliability of capacitors. The LLK series' exceptionally long lifespan and low impedance effectively ensure the efficiency and stability of power modules, providing a solid "energy foundation" for cloud computing and artificial intelligence.

• Industrial Automation and Motor Drives: In industrial equipment such as inverters and servo drives, LLK capacitors are primarily used for DC bus support and filtering. Its high withstand voltage and high ripple current capabilities smooth the rectified voltage and absorb energy generated by motor regenerative braking, ensuring stable and efficient operation of the drive system.

• New Energy: In new energy equipment such as photovoltaic inverters, wind turbine converters, and charging stations, the LLK series can withstand frequent power fluctuations and harsh outdoor environments, providing critical support for the conversion and utilization of clean energy.

• High-end smart power supplies: These devices, such as PD fast-charging power supplies and gallium nitride (GaN) fast-charging adapters, are moving towards high power density, posing challenges to the size, temperature resistance, and high-frequency characteristics of internal components. The corresponding specifications in the LLK series are optimized for these innovative applications.

V. Selection Guide and Technical Support

With the wide range of LLK series models (such as the LLKE1252G5R6MF and LLKB1102C1R0MF), how can you choose the right model? Designers should focus on the following parameters:
• Operating Voltage: Select a voltage that is higher than the circuit's maximum DC operating voltage, with some margin.

• Nominal Capacity: Determine based on circuit requirements such as filtering and energy storage.

• Service Life: Consider the expected operating temperature of the equipment and select a model that meets or exceeds the design life requirements.

• Ripple Current: Calculate the actual ripple current in the circuit and ensure that the rated ripple current of the selected capacitor (after frequency and temperature correction) exceeds this value.

• Operating Temperature Range: Ensure that the minimum and maximum ambient temperatures the equipment may encounter are covered.

YMIN not only offers high-quality LLK series capacitors but also has an experienced technical support team that can provide customers with comprehensive support from selection to application, helping customers enhance their products' market competitiveness.

Conclusion

In short, the YMIN LLK series ultra-long-life aluminum electrolytic capacitors are more than just simple electronic components; they are the "energy guardians" of modern high-reliability electronic equipment. With their rugged quality, stable and excellent performance, and wide environmental adaptability, they silently safeguard the stable operation of countless critical circuits. Choosing the LLK series means choosing lasting reliability and peace of mind for your product, a wise move that builds core advantages in the fiercely competitive market.