LKZ

LKZ Series: High-Performance, Long-Life Aluminum Electrolytic Capacitors Designed for Demanding Applications

In today's rapidly developing electronics industry, particularly in key sectors such as automotive electronics, industrial power supplies, and new energy, the reliability, stability, and lifespan of electronic components are placed on an exceptionally demanding level. A small capacitor is often the cornerstone of an entire system's long-term stable operation. YMIN understands this, and its LKZ series aluminum electrolytic capacitors are meticulously crafted to meet these demanding requirements. With their superior electrical performance, ultra-long service life, and robust environmental adaptability, they are a reliable choice for engineers working in demanding applications.

I. Product Series Positioning and Core Certifications: Targeting the High-End, Quality First

The LKZ series is no ordinary, general-purpose aluminum electrolytic capacitor. As its name and detailed technical specifications indicate, it belongs to YMIN's "liquid mini" product line, yet its performance is targeted at industrial and automotive applications. Its most notable feature is its full compliance with AEC-Q200 standards. AEC-Q200 is a stringent reliability testing standard for passive components established by the Automotive Electronics Council. This means that every LKZ capacitor undergoes rigorous testing, including temperature cycling, high-temperature load life, and humidity resistance, ensuring stable operation for years in the complex vibration, high temperature, and humidity environments of automotive electronics. This positioning inherently gives the LKZ series superior robustness and reliability compared to ordinary commercial components.

This series covers an extremely wide voltage range (from 10V to 600V DC) and capacitance range, with sizes ranging from a minimum of Φ8mm to Φ25mm, providing engineers with ample selection options. Whether for low-voltage, high-current power supply filtering or high-voltage, low-current signal coupling, a suitable model can be found.

II. Superior Technical Characteristics: Interpreting the Essence of "High Performance"

The superior performance of the LKZ series is reflected in the following core parameters:

1. Ultra-long lifespan: 12,000 to 15,000 hours at 105°C

This is one of the core competitive advantages of the LKZ series. In extreme ambient temperatures up to 105°C, this product series can guarantee continuous operation for 12,000 hours (approximately 1.4 years) to over 15,000 hours (approximately 1.7 years). In more common practical applications at 85°C or 65°C, the actual lifespan of the LKZ series can reach tens of thousands or even hundreds of thousands of hours, sufficient for applications with extremely high requirements for equipment lifespan, such as outdoor LED displays, communication base station power supplies, and industrial automation equipment, effectively reducing system maintenance costs and failure rates.

2. Low Impedance and High Ripple Current Withstand Capability

The LKZ series utilizes advanced materials and manufacturing processes to achieve low equivalent series resistance (ESR) and low impedance.

Low ESR means lower capacitor losses at high frequencies and better filtering performance. More importantly, it directly translates to a high rated ripple current withstand capability. Ripple current is the main cause of internal heating in capacitors. High ripple current handling capacity ensures that the LKZ series effectively suppresses noise and maintains a pure and stable output voltage, even in switching power supplies with drastic current fluctuations. Its own temperature rise is controllable, thus guaranteeing long-term operational reliability. The frequency and temperature correction coefficients provided in the technical parameter table provide engineers with a scientific basis for accurately calculating ripple current in practical applications.

3. Excellent Low-Temperature Start-up Performance

For the low-temperature environments that new energy vehicles and outdoor lighting may encounter, the LKZ series has been specially optimized for low-temperature characteristics. Technical parameters show that even at extremely low temperatures of -40°C, its impedance ratio (Z(-40°C)/Z(20°C)) is controlled within a reasonable range, ensuring smooth startup and stable operation of the system in cold environments. This solves the problem of startup failure caused by the sudden decrease in capacitance and dramatic increase in ESR of ordinary electrolytic capacitors at low temperatures.

4. Stringent Precision and Stability

Although the typical tolerance of aluminum electrolytic capacitors is ±20%, the LKZ series, after durability testing, maintains a capacitance change rate within ±20% of the initial value, with the loss tangent and leakage current not exceeding specified limits. This high consistency ensures stable performance in mass-produced products and reduces design margin challenges caused by component variability.

III. Wide Range of Practical Applications: Empowering Various Industries

Leveraging the above technological advantages, the LKZ series shines in several cutting-edge technology fields:

• Automotive Electronics: This is the core application area for the LKZ series. Whether it's traditional engine control units (ECUs) and body control modules (BCMs), or emerging electric vehicles' on-board chargers (OBCs), DC-DC converters, and battery management systems (BMS), capacitors that operate stably in high-temperature and vibration environments are required. The LKZ's AEC-Q200 certification and long lifespan make it the preferred choice for power filtering and energy storage in these critical subsystems.

• AI Data Servers and Communication Equipment: Modern server power supplies require extremely high power density and efficiency. LKZ's low ESR and high ripple current capabilities effectively handle the dramatic current fluctuations generated by server CPUs and GPUs, providing stable and clean power to data centers and ensuring the continuity and reliability of AI computing and data processing tasks.

• Industrial Automation and Robotics: Capacitors in industrial equipment such as servo drives and inverters need to withstand frequent charging and discharging and high ripple current. LKZ's robust construction and long lifespan reduce unexpected production line downtime and improve overall manufacturing efficiency.

• PD Fast Charging and High-End Power Supplies: With the widespread adoption of gallium nitride (GaN) technology, fast charging power supplies are switching at increasingly higher frequencies. LKZ's excellent high-frequency characteristics make it well-suited for high-frequency switching power supplies, enabling smaller, more efficient charger designs.

• New Energy and Smart Grids: In photovoltaic inverters, energy storage systems (ESS), and smart meters, LKZ can act as a DC-Link (DC support) or buffer capacitor, helping to smooth DC voltage, absorb voltage spikes during switching, and improve the efficiency and lifespan of the entire energy system.

• Outdoor Intelligent Lighting: Outdoor lighting equipment such as streetlights and landscape lights face the challenges of day-night temperature differences and rain/snow. LKZ's long lifespan and resistance to high and low temperatures ensure the long-term stable operation of lighting systems in harsh outdoor environments.

IV. Design and Selection Guidelines: How to Fully Utilize LKZ's Potential

To maximize the performance advantages of LKZ, engineers should pay attention to the following points during design and selection:

• Voltage Derating: It is recommended that the operating voltage not exceed 80%-90% of the rated voltage, especially in applications with high ambient temperatures. This can significantly extend the capacitor's lifespan.

• Ripple Current Calculation: Based on the actual operating frequency and ambient temperature, it is essential to calculate the actual allowable ripple current of the capacitor using the correction factors provided in the technical manual, ensuring that it is greater than the maximum ripple current in the circuit.

• Heat Dissipation Considerations: Although LKZ has good heat management, in high power density designs, it should still be provided with a good ventilation environment and kept away from other heat sources. If necessary, a heat sink can be considered.

• PCB Layout: Minimize capacitor lead length to reduce parasitic inductance and optimize high-frequency filtering performance.

V. Reliable Quality Assurance and Environmental Commitment

As a manufacturer with deep technological expertise, YMIN's liquid miniature business unit has focused on the research and development and manufacturing of aluminum electrolytic capacitors since 2001. The LKZ series not only complies with the RoHS directive, eliminating the use of hazardous substances, but also undergoes a complete quality control system. From raw materials to finished products, every step is rigorously tested to ensure that every product delivered to customers possesses superior quality and consistency.

In summary, the YMIN LKZ series aluminum electrolytic capacitors are not merely electronic components; they are the "energy guardians" and "stabilizing foundation" of modern high-reliability electronic systems. With automotive-grade quality, industrial-grade performance, and wide application adaptability, they provide engineers with powerful support to meet future technological challenges. Choosing LKZ means choosing a solid commitment to the long-term stable operation of your products.