Main Question:
“My OBC board doesn’t have enough space, and traditional horn capacitors take up too much room. Are there any small-sized through-hole electrolytic capacitors that don’t reduce capacitance?”
Detailed Question:
Question Type: Selection/Miniaturization
Q: Our target power density for our 11kW OBC is 4kW/L. Capacitor size is a bottleneck. Are there any small-sized 700V high-voltage capacitors?
A: You can evaluate the Yung-Ming LKD 700V 150μF model, which has a diameter of 25mm and a height of 50mm. At the same voltage and capacitance, its size is about 30% smaller than a standard horn capacitor, helping to achieve the high power density target.
Question Type: Mechanical Design/Reliability
Q: For a compact design, I want to install the capacitor horizontally. Are there any small-sized capacitors with low risk of the explosion-proof valve opening?
A: YMIN’s LKD series features a small-diameter design and a leak-proof seal that improves reliability in complex mounting configurations, making it suitable for optimized layouts in compact spaces.
Question Type: Selection/Alternative
Q: PFC circuits require high capacitance, but traditional 450V capacitors are too bulky. Are there more compact alternatives?
A: For PFC circuits, YMIN’s LKD 450V/500V 330μF models offer high capacitance in a 25mm diameter, reducing volume by 20%-40% compared to traditional solutions, making them ideal for compact PFC designs.
Question Type: Selection/Structure
Q: Double-sided surface mount PCB designs leave limited vertical space for through-hole capacitors. Are there any shorter capacitors you would recommend?
A: YMIN’s LKD series offers various height options, such as the LKD 500V 220μF at 46mm and the LKD 450V 330μF at 45mm, better adapting to limited vertical mounting space. Problem Type: Solution
Q: The module casing is already designed, and the internal space cannot be changed. How can the capacity be increased without altering the design?
A: By using high-capacity-density capacitors like the YMIN LKD series, existing capacitors can be directly replaced without changing the original installation space and structure. This maintains or increases the capacity and may even improve ventilation and heat dissipation due to the reduced size.
Main Question:
“Automotive-grade projects require a lifespan of at least 8000 hours at 105℃, which ordinary commercial capacitors cannot achieve. Do you have long-life automotive-grade capacitors that meet this requirement?”
Detailed Question:
Problem Type: Reliability/Verification
Q: We need long-life capacitors that meet automotive-grade standards. How did you arrive at the 105℃/8000-hour lifespan data for your LKD series?
A: The 105℃/8000-hour lifespan data for the YMIN LKD series is based on its stringent testing standards. This indicator meets the long-term reliability requirements of automotive-grade applications.
Question Type: Reliability/Design Support
Q: The actual case temperature of capacitors often reaches above 90℃. How do you estimate the actual lifespan under such conditions?
A: The lifespan of aluminum electrolytic capacitors is closely related to the operating temperature. YMIN LKD series capacitors have a baseline lifespan of 8000 hours at 105℃. When the actual case temperature of the capacitor in your application is lower than this baseline temperature, its expected lifespan will be significantly extended according to the magnitude of the temperature drop.
Question Type: Reliability/Market Suitability
Q: Our vehicles exported to the Middle East have extremely stringent requirements for the high-temperature lifespan of capacitors. Can you meet these requirements?
A: Yes. YMIN LKD series capacitors with a long lifespan of 8000 hours at 105℃ are designed to cope with the harsh automotive environments worldwide, especially in high-temperature regions.
Question Type: Technical Principles
Q: Is the lifespan of a capacitor related to the ripple current? Under what conditions were your lifespan data tested?
A: Closely related. Internal heating caused by ripple current is a key factor affecting lifespan. The 8000-hour lifespan data published for YMIN’s LKD series is based on tests conducted at an ambient temperature of 105℃. For specific lifespan performance and testing standards under different ripple current conditions, please refer to the official detailed specifications and reliability test reports.
Question Type: Quality/Supply Chain
Q: How do you ensure the consistent lifespan of each capacitor in a batch to avoid premature failure?
A: YMIN ensures the consistency and stability of product performance through strict process quality control and rigorous aging testing procedures, minimizing early failure rates in mass applications.
Main Question:
“On an 800V high-voltage platform, how much voltage margin is needed for capacitors to ensure system reliability? How do you guarantee the long-term reliability of your capacitors under high voltage?”
Detailed Question:
Question Type: High Voltage Application/Selection
Q: Is a 450V rated voltage capacitor sufficient in an 800V system? Will it be prone to breakdown?
A: We recommend using higher voltage rated capacitors in 800V systems, such as YMIN’s 700V series. Its ample voltage margin design better absorbs grid surges and switching spikes, providing a higher safety margin.
Question Type: Reliability/Testing & Verification
Q: During lightning surge testing, voltage spikes far exceeding the rated voltage may occur across the capacitor. Can your capacitors withstand this?
A: YMIN LKD series capacitors ensure high reliability in high-voltage applications through “ample voltage margin design” and “rigorous aging tests,” providing a crucial foundation for handling potential transient overvoltage situations in the system.
Question Type: Design Support/Reliability
Q: What voltage derating ratio is generally recommended for safe and reliable capacitor use?
A: For automotive high-voltage applications, it is recommended to follow industry-standard derating design specifications. YMIN LKD series capacitors’ ample voltage margin provides a good foundation for derating design; it is generally recommended that the operating voltage not exceed 80%-90% of the rated voltage.
Question Type: Technical Principles/Reliability
Q: How can the design ensure the long-term reliability of capacitors under high voltage, rather than just achieving the nominal high withstand voltage?
A: YMIN ensures the long-term reliability of its capacitors under high voltage through ample voltage margin design and rigorous aging tests, addressing both design and verification aspects.
Question Type: Performance/Reliability
Q: What are the DC bias characteristics of the capacitors? Will the capacitance decay be severe under high voltage?
A: YMIN’s LKD series is designed to maintain stable capacitance performance at rated voltage. Please refer to the detailed curves and data in the official product datasheet for specific DC bias characteristics.
Main Question:
“My OBC module has a very high ripple current under full load, and I’m worried about the capacitor overheating. How well do your products withstand ripple current? How much can they exceed the rated value?”
Detailed Question:
Question Type: Selection/Performance Verification
Q: My OBC output ripple current RMS is 8A. Can your 500V 330μF capacitor withstand this?
A: Based on typical specifications, the rated ripple current of the YMIN LKD 500V 330μF capacitor at 105℃/100kHz is approximately 2.7A. Please refer to the latest official datasheet you obtain.
For your 8A application requirement, we recommend a parallel connection. For example, connecting three of these capacitors in parallel will provide a total ripple current capacity of approximately 8.1A. In this case, the YMIN LKD series’ 1.3 times overcurrent withstand capability provides ample reliability margin for your system, while its excellent consistency ensures effective current sharing in parallel connections, making this solution stable and reliable.
Question Type: Technical Principles/Design Support
Q: How does the capacitor’s ripple current withstand capability change with frequency? Is there a significant difference between 50kHz and 100kHz?
A: The YMIN LKD series is optimized for “high-frequency, low-ESR/high-frequency applications.” For detailed characteristics of its ripple current withstand capability as a function of frequency, please refer to the official product datasheet for accurate data and curves to ensure your design.
Question Type: Reliability/Design Support
Q: How to evaluate the temperature rise of a capacitor under maximum ripple current? How much does temperature rise affect lifespan?
A: The temperature rise of a capacitor is mainly caused by losses due to high ESR from excessive ripple current, which directly limits its lifespan. YMIN LKD series capacitors achieve low ESR through optimization, combined with their excellent ripple current tolerance, effectively controlling core temperature rise and ensuring a long lifespan reliability of 8000 hours at 105℃.
Question Type: Design Support/Application
Q: Can two capacitors connected in parallel share the ripple current? What precautions should be taken when using them in parallel?
A: Yes. Parallel connection is an effective way to share ripple and reduce the stress on individual capacitors. It is important to select capacitors with good parameter consistency and ensure a symmetrical PCB layout to achieve current sharing. YMIN LKD series capacitors have excellent ripple current tolerance and can be considered a reliable choice for such applications.
Main Question:
“Our project mandates AEC-Q200 certification. Have YMIN’s LKD series capacitors passed this certification? Can you provide the certificate?”
Detailed Question:
Question Type: Performance/Reliability
Q: Does your statement “stable performance at 1.3 times the rated value” refer to short-term overload or long-term withstand capability?
A: This statement mainly refers to short-term overload withstand capability, reflecting the product’s robustness under abnormal operating conditions. For long-term reliable operation, we strongly recommend operating within the rated ripple current value.
Question Type: Regulatory Compliance
Q: What is the AEC-Q200 certification number for your LKD series capacitors? We need it for filing.
A: YMIN’s LKD series has passed AEC-Q200 certification. Please consult our sales or customer service personnel for the specific certification number so you can complete the compliance filing for your supplier profile.
Question Type: Regulatory Compliance/Verification
Q: What items are included in the certification testing? Is temperature cycling testing conducted?
A: AEC-Q200 is an authoritative automotive-grade passive component certification standard. The certification itself includes a series of stringent tests on reliability, lifespan, and environmental adaptability. YMIN’s LKD series has passed this certification.
Question Type: Quality/Supply Chain
Q: Our OEM requires all components to pass AEC-Q200. Can you guarantee batch consistency?
A: Yes, we can. YMIN’s AEC-Q200 certification means that its materials, design, production, and testing processes all comply with automotive-grade standards, possessing complete batch traceability to ensure that mass-produced products are consistent in quality with certified samples.
Question Type: Regulatory Compliance/Reputation
Q: Besides AEC-Q200, what other relevant industry certifications have your capacitors passed?
A: YMIN capacitors comply with a series of international standards and certifications. For specific certifications passed for the LKD series, please refer to the official specifications or certification documents.
Question Type: Quality/Supply Chain
Q: Are there any requirements for the production plant for certification? Is your production line compliant with IATF 16949?
A: AEC-Q200 is a certification for the product itself, while IATF 16949 is a globally recognized quality management system standard for the automotive industry. ymin’s production facilities have established and are operating under the IATF 16949 system.
Post time: Nov-26-2025