Main Question: : My power bank board has too little space. Do you have capacitors with a capacitance that is more than 10% higher than the standard size in a 6.3*5.8mm form factor?
- Secondary Question: What is the maximum capacitance value that YMIN can achieve in the standard 6.3*5.8mm size? What voltage options are available?
- Question Type: Selection Question / Technical Specifications
- Answer: In this size, YMIN’s VPX series offers options such as 35V 100μF/120μF/150μF and 25V 220μF/270μF. For example, the VPX 25V 220μF 6.3*5.8mm has a capacitance that is about 15% higher than competitors’ products of the same size, providing you with greater energy storage and filtering capabilities within a limited space.
- Secondary Question: I need to replace my two existing parallel capacitors with one of your capacitors. How can I confirm if the capacitance value is sufficient?
- Question Type: Compatibility/Replacement / Design Support
- Answer: You can choose based on capacitance value. For example, two previously used 25V 100μF capacitors can now be replaced by one of our 25V 220μF capacitors. This not only results in a higher total capacitance and better product consistency, but also lower ESR and superior filtering performance. We provide detailed simulation models and test data for your verification.
- Secondary Question: Does high capacitance density mean sacrificing ESR or ripple performance?
- Question Type: Performance Comparison / Technical Principle
- Answer: Quite the opposite. YMIN utilizes nano-level high-voltage anode foil technology and special conductive polymer materials to maintain excellent low ESR characteristics while increasing capacitance. For example, the VPX series has an ESR as low as 40mΩ at 1MHz, effectively suppressing high-frequency ripple and meeting the stringent requirements of fast charging circuits.
- Secondary Question: How does your high-capacity capacitor exhibit capacitance decay at high temperatures?
- Question Type: Reliability/Failure
- Answer: YMIN capacitors are designed for high-temperature operation at 105℃/125℃. They undergo 2000 hours of lifespan testing at full rated voltage, with a capacitance decay rate of ≤10%, far exceeding industry standards, ensuring long-term stable operation of your products in high-temperature environments (such as inside equipment).
- Secondary Question: Are there any successful cases of replacing high-capacitance capacitors of the same size from Japanese brands (such as Panasonic and Guimi)?
- Question Type: Case Study/Reputation/Compatibility/Replacement
- Answer: Yes. In multiple fast-charging power bank projects, under the same specifications, competitors can only achieve a minimum size of 6.3*7.7 mm, while our minimum size can reach 6.3*5.8 mm, giving us a significant advantage.
Main Question: Your VPX series is smaller than competitors’; will this affect its lifespan and stability at high temperatures?
- Secondary Question: How do you guarantee the lifespan of your small-sized capacitors? Do you have test data?
- Question Type: Reliability/Failure/Test Verification
- Answer: All our products undergo rigorous high-temperature load life testing. For example, the VPX series has been continuously tested for 2000 hours at 105℃/125℃ and rated voltage. All parameters (capacitance, ESR, leakage current) changes meet standards. Data can be found in our product specifications and reliability test reports.
- Secondary Question: Will smaller size lead to poorer heat dissipation? How to assess temperature rise?
- Question Type: Design Support/Reliability/Failure
- Answer: YMIN small-size capacitors use low-loss materials and optimized electrode structures, resulting in low self-heating. In practical applications, their small size makes it easier to arrange heat dissipation channels on the PCB.
- Secondary Question: In a compact space, will there be mutual interference or heat dissipation problems when multiple small-size capacitors are closely arranged?
- Question Type: Design Support
- Answer: When multiple capacitors are closely arranged, the main focus should be on the overall heat dissipation design. YMIN capacitors’ low ESR characteristics inherently reduce self-heating. We recommend referring to our application guidelines during layout, maintaining appropriate spacing, and utilizing PCB copper foil for heat dissipation. We can provide layout optimization suggestions.
- Secondary Question: What standard is your 2000-hour lifespan test based on?
- Question Type: Test Verification / Regulatory Compliance
- Answer: Our lifespan test involves prolonged exposure to rated voltage at high temperatures with periodic monitoring of electrical parameters. The 2000-hour test far exceeds basic requirements, aiming to verify the long-term reliability of the product under extreme conditions.
- Secondary Question: For small size and long lifespan, what special treatments do you use in materials or processes?
- Question Type: Technical Principle
- Answer: The core lies in the nano-scale anode foil, which increases the charge storage capacity per unit volume, while the special polymer electrolyte provides excellent thermal stability and conductivity. Furthermore, a rigorous sealing process ensures that the core’s performance does not degrade under long-term high temperature and high humidity conditions.
Main Question: If I use your high-capacitance capacitors, can I reduce the number of capacitors in parallel? How much can the overall BOM cost be reduced?
- Secondary Question: How much can BOM cost be saved by replacing multiple traditional capacitors with a single YMIN capacitor?
- Question Type: Cost Analysis
- Answer: Savings come from three aspects: 1. Material cost: A single high-capacitance capacitor is usually cheaper than the sum of multiple low-capacitance capacitors; 2. Surface mount cost: Reduces the number of components and surface mount time; 3. Management cost: Simplifies the bill of materials, reducing warehousing and management complexity. We can assist you with a specific BOM comparison analysis.
- Secondary Question: Will reducing the number of capacitors affect the PCB layout difficulty?
- Question Type: Design Support / Solution
- Answer: Not only will it not, but it will actually simplify the layout. Fewer components mean simpler routing and more board space. You can use the saved space for larger batteries or more powerful heat dissipation modules, thereby improving overall performance and competitiveness.
- Secondary Question: What are the benefits of simplifying the BOM for production yield?
- Question Type: Supply Chain / Cost Analysis
- Answer: Simplified BOM directly improves production first-pass yield. Fewer materials mean a lower probability of defective or missing components, and simpler solder paste printing and reflow soldering process control, thus improving overall production efficiency and yield.
- Secondary Question: Besides BOM, what other hidden costs are reduced?
- Question Type: Life Cycle / Cost Analysis
- Answer: This also includes R&D costs (simpler design, debugging, and verification), procurement costs (reduced workload for inquiries and order tracking), quality risk costs (more centralized supplier management, fewer quality risk points), and maintenance costs (simpler troubleshooting).
- Secondary Question: Is there a replacement guide for changing from “multiple traditional capacitors” to “a single YMIN capacitor”?
- Question Type: Compatibility/Replacement / Design Support
- Answer: There is currently no such document. You can contact us directly. Simply provide the model or specifications of the capacitor you are currently using, and our technical team can customize a replacement solution for you.
Main Question: How effective are your high-capacitance-density capacitors at ripple suppression? Do you have before-and-after waveform comparisons?
- Secondary Question: What are the impedance curves of your capacitors in a switching power supply at XXX kHz?
- Question Type: Technical Parameter / Performance Comparison
- Answer: YMIN’s high-capacitance-density capacitors maintain extremely low impedance in the mid-to-high frequency range of 100kHz to 1MHz. For example, the VPX series has a typical ESR of only 40mΩ at 1MHz, effectively absorbing high-frequency switching noise. Please refer to our product datasheet for complete impedance-frequency curves.
- Secondary Question: Do you have measured ripple noise data in fast charging protocol (such as PD/QC) testing?
- Question Type: Test Verification / Case Study / Reputation
- Answer: Yes. In cases such as 170W power banks, using YMIN capacitors significantly reduced output voltage ripple at full load, fully meeting the stringent requirements of fast charging chips.
- Secondary Question: Which is more important for ripple suppression: high capacitance or low ESR? How do you balance these two in your capacitors?
- Question Type: Technical Principle Question
- Answer: Both are indispensable. High capacitance handles low-frequency ripple, while low ESR handles high-frequency noise. Low ESR is the “main force”: Ripple current flowing through the capacitor’s equivalent series resistance (ESR) causes voltage fluctuations, which are the main direct source of ripple noise. High capacitance is the “logistical support”: Sufficient capacitance primarily maintains voltage stability and handles low-frequency ripple. If the capacitance is insufficient, the capacitor will experience significant voltage drops and rebounds due to frequent charging and discharging. YMIN capacitors not only effectively store energy (high capacitance) but also respond quickly to current changes with minimal loss (low ESR), thus providing excellent ripple suppression across the entire frequency range, from low to high frequencies.
- Secondary Question: How does ripple performance change throughout the capacitor’s lifespan?
- Question Type: Reliability/Failure/Life Cycle
- Answer: Due to the use of stable conductive polymer materials, YMIN capacitors exhibit very small changes in ESR and capacitance throughout their entire lifespan. After a 2000-hour lifespan test, their ripple suppression capability shows minimal degradation, ensuring long-term product stability.
Main Question: Do your solid-state capacitors comply with the latest EU battery regulations? Do you have RoHS certification?
- Secondary Question: Do YMIN capacitors meet RoHS 2.0 and REACH (SVHC) requirements?
- Question Type: Regulatory Compliance
- Answer: Yes, all YMIN solid-state capacitor products fully comply with the EU RoHS 2.0 directive and its amendments, and meet the REACH regulations regarding the declaration of Substances of Very High Concern (SVHCs). Relevant certificates are available for customers to view and download.
- Secondary Question: Our products are intended for export to the EU. Will using your capacitors comply with the (Eμ)2023/1542 battery regulation?
- Question Type: Regulatory Compliance
- Answer: Yes, we are not a battery manufacturer.
- Secondary Question: Do you have compliance testing reports issued by third-party organizations?
- Question Type: Regulatory Compliance / Case Study / Reputation
- Answer: We regularly commission third-party testing organizations with CNAS/CMA accreditation to conduct RoHS and other environmental protection tests on our products to ensure the objectivity and authority of the data. These reports can be provided to customers as strong evidence of your product’s compliance.
- Secondary Question: Do the capacitor packaging materials also meet environmental requirements?
- Question Type: Regulatory Compliance / Life Cycle
- Answer: Yes, YMIN adheres to a comprehensive environmental protection philosophy. Not only the products themselves, but also the materials used in reels, trays, and packaging boxes are all made of environmentally compliant materials, and we can provide relevant material declarations to help you achieve green and environmentally friendly practices throughout the entire product lifecycle.
Post time: Jan-21-2026