What is a wound type film capacitor?

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

The internal structure of film capacitors has an important impact on their performance, reliability and service life. According to the different internal structures, film capacitors are divided into wound film capacitors and laminated film capacitors. Commonly used CBB capacitors and CL capacitors are wound film capacitors.

Many people know about film capacitors, but not necessarily about wound film capacitors. Today, we will introduce the structure, advantages and application fields of wound film capacitors. What are wound film capacitors?

The wound film capacitor is composed of metal foil, plastic film such as polyethylene, polypropylene, polystyrene or polycarbonate, and a shell, and the capacitor structure is formed by winding and stamping.

During the manufacturing process, metal foil and polymer film are alternately stacked, and then wound by a winder and loaded into a metal casing. This structure makes the wound film capacitor have a higher capacity density and good electrical properties.

What are the advantages of wound film capacitors?

1. Small size and light weight

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

Wound film capacitors have high capacitance and low leakage current, which can effectively reduce circuit power consumption and noise. They have a wide capacitance range and can meet the needs of different application scenarios.

3. Good temperature stability and self-healing properties

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

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

However, there are different types of wound film capacitors, which are used in different scenarios. Therefore, when choosing a film capacitor, you need to choose a suitable film capacitor according to the specific application scenario and needs to play its role.