KCG

KCG Series: Ultra-Miniature High-Voltage, High-Capacity Aluminum Electrolytic Capacitors Designed for High-Reliability Power Supply Applications

In today's rapidly developing electronics industry, especially in high-end applications such as fast charging, new energy, and automotive electronics, the stability, efficiency, and size of power supplies are facing increasingly stringent challenges. As the core energy storage and filtering components in power circuits, capacitors directly determine the reliability, lifespan, and energy efficiency of the entire system. YMIN's KCG series radial lead aluminum electrolytic capacitors are a high-performance solution meticulously designed to address these challenges. With its core advantages of "ultra-miniature size, high voltage withstand, large capacity, long lifespan, and excellent high-frequency low impedance characteristics," it stands out in the fierce market competition and has become the preferred component for engineers designing high-reliability power supplies.

I. Precise Positioning: Addressing the Design Challenges of High-Power-Density Power Supplies

The design intent of the KCG series capacitors is very clear: to provide stable and powerful capacitive energy storage and filtering capabilities within the most limited space possible. Traditional high-voltage, high-capacity capacitors are often bulky and difficult to adapt to the increasingly compact internal layout of modern electronic devices. The KCG series, through advanced materials science and manufacturing processes, successfully accommodates rated voltages up to 400V and capacitances exceeding 100μF (up to 120μF) within miniaturized housings (diameters ranging from 5mm to 18mm). This characteristic makes it particularly suitable for space-sensitive applications such as:

• Gallium Nitride (GaN) Fast Charging Power Supplies: With the widespread adoption of GaN technology, charging heads are becoming increasingly smaller while power output continues to rise. The KCG series provides efficient rectification and filtering for the primary side of high-frequency switching power supplies, ensuring stable output, while its miniaturization perfectly matches the internal space requirements of mini chargers.

• Server/Communication Equipment Power Supplies: Data centers and communication base stations have extremely high requirements for power density and reliability. The KCG series provides ample buffering and filtering in compact power modules, ensuring 24/7 uninterrupted operation of critical equipment.

• New Energy Applications (PV Inverters, On-Board Chargers): These applications operate in complex environments, requiring capacitors to operate stably under high voltage and high current surges. KCG's high voltage withstand and large capacitance characteristics make it an ideal bypass and filtering component in DC-Link circuits.

II. Superior Performance: The Cornerstone of High Reliability

The performance parameters of the KCG series fully embody its product philosophy of "born for harsh environments."

1. Ultra-long Service Life and High Temperature Resistance: The KCG series offers two top-tier combinations of operating temperature and lifespan: up to 4000 hours in harsh environments at 105°C; and a stable 2000 hours of operation even at higher ambient temperatures of 115°C. This is thanks to its high-quality electrolyte and special sealing technology, which effectively slows down the drying rate of the electrolyte at high temperatures, significantly extending the effective service life of the capacitor and reducing the overall system failure rate and maintenance costs.

2. Lightning Protection and Low Leakage Current (Low Standby Power Consumption): The product particularly emphasizes "lightning protection and low leakage current" characteristics. Its leakage current value is strictly controlled at an extremely low level (calculated as ≤0.015CV+10μA). This characteristic is crucial for modern energy-saving standards, effectively reducing reactive power consumption in standby mode and meeting increasingly stringent global energy efficiency regulations (such as the EU's ErP Directive). Simultaneously, enhanced surge protection enables it to withstand transient high-voltage surges in the power grid (such as lightning strikes), improving its survivability in harsh power grid environments.

3. High Ripple Current Withstand Capability and Low Impedance: In high-frequency switching power supplies, ripple current is one of the main causes of capacitor overheating and failure. The KCG series achieves high ripple current withstand capability through optimized electrode foil etching technology and electrolyte formulation. For example, the KCGJ3002G121MF model can achieve a ripple current of up to 1650mA at 105°C and 120Hz. Furthermore, it exhibits excellent high-frequency low impedance characteristics (low ESR value), meaning that during high-frequency operation, the capacitor itself experiences less energy loss, generates less heat, and has better filtering performance, further ensuring the power supply's conversion efficiency and output quality. The accompanying frequency correction factor table (with a factor of 1 at 100kHz) facilitates engineers' accurate calculation of actual performance at different operating frequencies.

4. Strict Quality Consistency: After 1000 hours of high-temperature storage at 105°C and rated voltage load life testing, key parameters of the KCG series, such as capacitance change rate, loss tangent, and leakage current, are controlled within strict ranges (e.g., capacitance change within ±20%). This ensures that every KCG capacitor leaving the factory possesses reliable and consistent electrical performance, meeting the high requirements for component consistency in large-scale industrial production.

III. Robust Physical Structure and Environmental Standards

The KCG series adopts a standard radial lead design, offering various size (D x L) combinations for convenient automated mounting or manual soldering on PCBs. Its casing features an explosion-proof valve design, ensuring safe use under extreme abnormal conditions. The entire product line complies with the RoHS directive and does not contain restricted hazardous substances, reflecting YMIN's social responsibility for environmental protection.

IV. In-depth Analysis of Application Scenarios

The applications of the KCG series extend far beyond the aforementioned fast charging and server power supplies. Its powerful performance makes it shine in several cutting-edge fields:

• Automotive Electronics: In the BMS (Battery Management System), OBC (On-Board Charger), and DC-DC converters of new energy vehicles, the KCG series can withstand the high-temperature environment of the engine compartment and provide stable filtering and energy buffering for high-voltage circuits, contributing to the safety and efficiency of automotive electrification.

• Industrial Drives and Smart Lighting: In industrial equipment such as frequency converters and servo drives, the stability of the power supply directly affects the continuous operation of the production line. KCG's long lifespan and high reliability reduce the risk of downtime. In high-power smart lighting systems (such as LED display driver power supplies), its excellent filtering performance effectively suppresses flicker, provides clean DC power, and improves display effects and lamp lifespan.

• Smart Home Appliances and Energy Storage Systems: High-end home appliance inverter power boards and home energy storage system inverter units both require small-sized, high-performance capacitors like KCG to improve overall energy efficiency and reliability.

Conclusion

In summary, YMIN's KCG series aluminum electrolytic capacitors are more than just simple electronic components; they are the culmination of engineering wisdom in modern high-power-density, high-reliability power supply design. They successfully strike the optimal balance between the seemingly contradictory design goals of "miniaturization," "high performance," and "long lifespan." Whether facing rapidly evolving fast-charging technologies or the sweeping new energy revolution, the KCG series, with its solid specifications, robust performance, and wide application adaptability, proves itself to be a reliable partner for engineers tackling demanding power supply challenges. Choosing KCG means choosing lasting stability and efficiency for your power system.