(MENAFN- Market Press Release) November 4, 2025 11:31 pm - Liquid Shock-Resistant Mounted Aluminum Electrolytic Capacitors Empower Low-Altitude Flying Car Technology FAQ

Low-altitude flying cars, as a crucial direction for future transportation, place extremely high demands on the reliability and resilience of core components. Yung-Ming Electronics' liquid shock-resistant mounted aluminum electrolytic capacitors, with their breakthrough 10-30g shock resistance performance, provide key support for this field. We have compiled ten frequently asked questions regarding the product's technical details and application value for industry reference.

## 1. How is the "10-30g" shock resistance performance defined? What are the testing standards?

Here, "g" represents gravitational acceleration, the core unit for measuring vibration acceleration. Yung-Ming's capacitor's 10-30g shock resistance parameter is based on sinusoidal vibration testing, accurately simulating the periodic vibration stress encountered by the product during transportation and flight. The testing process strictly adheres to the IEC 60068-2-6 International Electrotechnical Commission standard, ensuring mechanical robustness in high-vibration environments and meeting the stringent usage scenarios of low-altitude flying cars.

## 2. What are the core performance advantages of liquid capacitors compared to solid capacitors?

Compared to ordinary liquid surface-mount capacitors of the same specifications, this product, through optimized electrode foil and electrolyte formulation, achieves lower equivalent series resistance (ESR) and higher rated ripple current over a wide temperature range of -40°C to +105°C/125°C, efficiently handling large current pulses in electronic control systems.

Compared to solid capacitors, its advantages are concentrated in two points: firstly, it offers higher cost-effectiveness in high-temperature and high-voltage scenarios; secondly, it avoids the DC bias characteristic problem of solid capacitors, resulting in more stable capacitance with voltage changes, making it suitable for the complex electrical environment of flying cars.

## 3. What is the operating temperature range? Can its low-temperature performance cope with high-altitude environments?

The standard operating temperature range of the product is -40°C to +105°C, with some models further extended to +125°C, fully covering the conventional operating temperature range of low-altitude flying cars.

For high-altitude, low-temperature scenarios, the R&D team has specifically optimized the electrolyte formula. Even in extremely low temperatures of -40°C, the ESR increase remains within a controllable range, ensuring system stability during cold starts and low-temperature operation, and preventing performance fluctuations due to sudden temperature drops.

## 4. What's special about the "mount-mount" structure? How does it contribute to vibration resistance?

The "mount-mount" design is the core structural design of this product, referring to the capacitor core being securely mounted on a metal or resin base, achieving SMT mounting via the base pads. Its improved vibration resistance relies on a "three-in-one" design:

1. A robust base structure disperses vibration stress from the PCB board to the entire base, reducing localized stress;

2. The internal core is rigidly fixed to prevent electrode movement due to vibration;

3. Combined with high-performance potting compound, it further buffers and absorbs vibration energy, ultimately achieving a leap in vibration resistance from 5-10g to 10-30g.

## 5. What solutions does the product offer to address the challenges of automotive thermal management systems?

In automotive thermal management systems, capacitors in water pump and oil pump drivers must simultaneously address three major challenges: high ripple current generated by high-frequency switching, the high-temperature environment of the engine compartment, and engine vibration interference.

Yongming's capacitor, with its high ripple current capability, 105°C/125°C high-temperature rating, and 10-30g shock resistance, can operate stably in harsh environments, ensuring the accuracy and reliability of motor control and continuously powering the thermal management system.

## 6. How to avoid fatal failures in Electric Power Steering (EPS) systems?

As a safety-critical system, EPS is susceptible to system failure due to capacitor short circuits, open circuits, and other failure modes. Yongming maximizes risk mitigation through triple protection:

1. Using high-purity raw materials and implementing strict process control to reduce failures caused by internal impurities;

2. Innovative pressure release mechanism design, even for surface-mount structures, providing safety functions similar to explosion-proof valves;

3. All products undergo 100% surge current and withstand voltage testing to eliminate early failures. Meanwhile, its excellent shock resistance directly prevents internal fractures (open circuits) or short circuits caused by vibration.

## 7. What role does the capacitor play in the flight control system?

In the flight control system of low-altitude aircraft, the capacitor is mainly used in the power supply circuits of the flight control computer and servo motor drivers. Its core functions include three points: first, voltage stabilization, ensuring stable circuit voltage; second, filtering, filtering current impurities; and third, providing instantaneous pulse current to meet the rapid response requirements of the servo motors. The flight control system has extremely high requirements for voltage purity and instantaneous response; the stable performance of the capacitor is the foundation for accurate sensor data and rapid servo motor operation.

## 8. Has it been optimized for complex airflow vibration spectra?

Yongming has conducted specific optimizations for the complex vibration spectra generated by changes in airflow in aircraft. Product vibration testing covers a wide frequency range from 10Hz to 2000Hz, with particular attention paid to the mid-to-high frequency range (such as 50Hz-2000Hz) related to aircraft motors and propellers. By adjusting the structural design, the product's resonant frequency is avoided in these critical frequency bands, ensuring stable performance even in complex vibration environments and unaffected by airflow interference.

## 9. How to balance high shock resistance and lightweight requirements?

Low-altitude aircraft are extremely sensitive to weight and size. Yung-Ming focused on balancing shock resistance and miniaturization requirements in its design:

On the one hand, high-capacitance electrode foil was used to significantly reduce the core package volume for the same capacity; on the other hand, the amount of base and packaging materials was optimized to avoid over-design leading to increased weight. The final product meets the 10-30g shock resistance rating while maintaining the same size and weight as conventional products of the same specifications, fully complying with the lightweight requirements of aircraft.

## 10. How to solve the lifespan problem of liquid capacitors?

Compared to solid capacitors, liquid capacitors are more susceptible to lifespan issues due to electrolyte drying. Yung-Ming has overcome this limitation through two key technologies:

1. Employing a composite electrolyte with high flash voltage and low vapor pressure, significantly reducing evaporation loss under high-temperature environments;

2. Using a high-performance sealing rubber stopper, greatly reducing electrolyte permeability and slowing down the drying rate. The combination of these two technologies significantly extends the product's service life at high temperatures, meeting the long-term usage requirements of low-altitude flying cars.

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