In the complex circuitry of electronic devices, the reliability and stability of capacitors are crucial to the sustained normal operation of the equipment. Thanks to a series of excellent design features, LCA® feedthrough capacitors demonstrate significant advantages in both aspects.
Feedthrough capacitors are highly discerning in their material selection, often employing premium dielectric materials such as ceramics (e.g., NP0, X7R) or metallized films. Taking NP0 ceramic dielectric as an example, it possesses an extremely low temperature coefficient. Across a wide temperature range from -55°C to 125°C, the variation in capacitance value is minimal, enabling it to consistently maintain stable electrical performance without significant capacitance drift due to fluctuations in ambient temperature, thereby providing reliable capacitive support for the circuit.
Its unique structural design is key to ensuring reliability. The feedthrough capacitor adopts a feedthrough structure, allowing the signal conductor to pass directly through the center of the capacitor. This significantly shortens the current path and effectively reduces the Equivalent Series Inductance (ESL) and Equivalent Series Resistance (ESR). Low ESL and ESR mean lower energy loss and less heat generation during charging and discharging, reducing the risk of failure due to self-heating and resulting in slow performance degradation over long-term use. For instance, in high-frequency switching power supplies where frequent current switching places extremely high demands on capacitor stability, feedthrough capacitors can operate consistently and reliably thanks to their low-loss characteristics, ensuring efficient power output.
In terms of packaging, feedthrough capacitors often feature a sealed design, such as threaded metal housings or welded hermetic structures, which comprehensively isolate the component from adverse external factors. In industrial environments where equipment often faces dust, moisture, and strong vibration or shock, sealed feedthrough capacitors effectively prevent dust and water ingress, avoiding short circuits or performance degradation of internal circuits due to humidity or dust accumulation. Furthermore, the robust housing can withstand vibrations, preventing internal structural loosening and ensuring reliable capacitor operation under harsh working conditions.
Additionally, feedthrough capacitors excel in withstanding electrical stress. They can endure high voltage surges and significant current fluctuations. In the event of instantaneous overvoltage or overcurrent in the circuit, they are not easily broken down or damaged, maintaining their own performance stability and thereby safeguarding the reliability of the entire circuit. This is particularly prominent in scenarios with electrical transients, such as automotive engine starts or motor start-stop operations.
Leveraging high-quality materials, an ingenious structure, reliable packaging, and excellent electrical performance, LCA® feedthrough capacitors stand out as electronic components with outstanding reliability and stability, solidifying the foundation for the stable operation of various electronic devices.
——2017.2.16
