Today we'll talk about wound film capacitors

Film capacitors, as a widely used electronic component, play an important role in the electronics industry.

The internal structure of a film capacitor has a significant impact on its performance, reliability, and service life. Based on their internal structure, film capacitors are classified into wound film capacitors and laminated film capacitors. Commonly used CBB capacitors and CL capacitors are wound film capacitors.

Many people are familiar with film capacitors, but not necessarily with wound film capacitors. Today, we'll explore the structure, advantages, and applications of wound film capacitors. What is a wound film capacitor?

Wound film capacitors are composed of metal foil, plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate, and a casing, and are formed by winding and stamping.

During the manufacturing process, metal foil and polymer film are alternately stacked, and then wound into a metal casing using a winding machine. This structure gives the wound film capacitor high capacitance density and good electrical performance.

What are the advantages of wound film capacitors?

1. Small size and light weight

Roll-wound film capacitors have the advantages of small size and light weight, which makes them widely used in electronic devices with limited space.

2. High capacity, low leakage current

Roll-wound film capacitors offer high capacitance and low leakage current, effectively reducing circuit power consumption and noise. Their wide capacitance range caters to diverse application needs.

3. Good temperature stability and self-healing properties

Wound film capacitors also have good temperature stability and self-healing properties, enabling them to operate normally over a wide temperature range and recover from damage to a certain extent, thus extending their service life.

Roll-wound film capacitors are widely used in power electronics, communication equipment, automotive electronics and other fields due to their advantages such as small size, light weight, high capacitance, low leakage current, good temperature stability and self-healing properties.

However, wound film capacitors also come in different models and are used in different scenarios. Therefore, when selecting a film capacitor, it is necessary to choose the appropriate film capacitor based on the specific application scenario and requirements in order to achieve its intended function.