Introduction
Engineers, when designing DC-Link circuits for 800V OBC/DCDC applications, have you ever struggled with capacitor selection? Conventional high-voltage electrolytic capacitors are bulky and have a short lifespan, while film capacitors are expensive. Today, we’ll delve into a solution that strikes an excellent balance between performance and cost: YMIN’s CW3H Series Liquid Horn Capacitors.
800V Platform – Liquid Horn Capacitor Solution
-Core Requirements for DC-Link Capacitors in the 800V Platform-
High withstand voltage: Must withstand DC bus voltages up to 450V-500V and potential surges.
High ripple current: Under high-frequency switching conditions, capacitors must withstand significant ripple current without overheating.
Small size: Limited module space requires capacitors with a high volume-to-capacitance ratio.
Long life: The product must meet automotive-grade temperature life requirements and ensure a lifespan comparable to the vehicle.
- YMIN Solutions and Process Advantages -
The YMIN CW3H series precisely addresses these requirements through the following technological innovations:
Process Innovation: Utilizing a special riveting and winding process, the internal structure is optimized, achieving higher capacity within the same volume, or reducing the volume by approximately 20% within the same specifications.
Material Innovation: Utilizing a new low-loss electrolyte, the ESR is effectively reduced, thereby improving ripple current capability (up to 1.3 times the rated value), fundamentally controlling temperature rise and delaying aging.
Design Innovation: Adequate voltage margin design and strict quality control ensure stable operation for over 3,000 hours at temperatures up to 105°C, significantly improving reliability.
Specifications:
- Data Verification -
Laboratory data demonstrates that the CW3H series performs exceptionally well in several key tests:
Temperature Rise Test: At 1.3 times the rated ripple current, the core temperature rise remains stable, with no performance degradation.
Lifespan test: Continuous operation at 105°C results in over 3,000 hours.
Size Comparison: Compared to conventional products of the same specification, this product is significantly smaller.
Recommended Models -
CW3H 450V 330μF 25*50; 105°C 3000H; 10G
CW3H 450V 560μF 30*50; 105°C 3000H; 10G
Conclusion
For 800V platform OBC/DCDC DC-Link applications, if you’re looking for a high-voltage electrolytic capacitor that combines compact size, high current handling, long life, and cost-optimized performance, the YMIN CW3H series is a proven and reliable choice.
Post time: Oct-23-2025