Film capacitors are the most commonly used capacitors on circuit boards, and their widespread adoption can be attributed to various inherent advantages. What are the key advantages of film capacitors, and what are some common applications?
Wide Temperature Range
Film capacitors have a relatively broad temperature range, with minimal restrictions imposed by temperature variations.
Extended Lifespan
These capacitors exhibit an exceptionally long lifespan; as long as they remain undamaged, there is virtually no limit to their usability, allowing for prolonged and continuous use.
Self-Healing Properties
Film capacitors, being metalized, possess self-healing capabilities. In the event of minor damage, they can automatically repair themselves.
High Voltage Tolerance
During operation, these devices can withstand high voltages without encountering issues or failures.
Non-Polarity
In contrast to electrolytic capacitors, film capacitors are non-polar, and they have very low Equivalent Series Resistance (ESR).
Excellent Frequency Characteristics
When in use, film capacitors demonstrate favorable frequency characteristics.
Primary Applications of Film Capacitors:
Film capacitors find extensive application in instruments, meters, televisions, and household appliance circuits. They are used for both direct current pulsation and alternating current voltage reduction, proving especially suitable for various types of electronic rectifiers and energy-saving lamp circuits. Additionally, they are employed in circuits for absorbing high-voltage potentials in various types of contactor contact points. Film capacitors are characterized by their non-polarity, high insulation resistance, excellent frequency characteristics (broad frequency response), and minimal dielectric losses.
Based on the aforementioned advantages, CBB capacitors are extensively used in analog circuits, particularly in the interconnection of signals. In signal interconnection, capacitors with excellent frequency characteristics and extremely low dielectric losses are essential to ensure minimal distortion during signal transmission. CBB capacitors, with their higher dielectric constant, small size, large capacitance, and good stability, are well-suited for use as bypass capacitors. Polypropylene film capacitor dielectrics exhibit low loss and high insulation resistance, making them suitable for high-frequency circuits, despite their relatively large temperature coefficient.
This article is provided by JYH HSU (JEC) Electronics. JEC is a research, development, production, and sales-oriented company specializing in manufacturing and selling various electronic components such as capacitors and resistors.
Post time: Dec-28-2023