Which capacitor is more suitable for applications requiring high voltage but lower capacity?

In applications that require high voltage with lower capacity, oil-filled capacitors are particularly suitable. Oil-filled capacitors are designed to handle high voltages efficiently, thanks to the insulating properties of the oil used within them. The oil not only acts as a dielectric material, which enhances the capacitor's ability to withstand electrical stress, but it also helps in cooling and mitigating any potential breakdown.

These capacitors are commonly employed in high voltage applications such as power transmission and reactive power compensation. Their ability to operate under high voltage conditions while maintaining a lower capacitance makes them preferable in such scenarios.

Other types of capacitors, such as electrolytic capacitors, have limitations in high voltage applications due to their construction and the electrolyte they use, which can lead to failure if the voltage exceeds certain levels. Film capacitors can handle higher voltages than electrolytic but are often bulkier and less efficient at lower capacitance values. Trimmer capacitors are designed for fine-tuning capacitance rather than for high voltage applications. Thus, oil-filled capacitors stand out for high voltage needs with low capacitance requirements.