SFT37S70-5K491E-F

Film Capacitors

Film capacitors, also known as plastic film capacitors, are capacitors with a thin plastic film as the dielectric material. They have become quite popular due to their light weight, excellent stability, and good performance under extreme conditions. Film capacitors are used widely in many applications, such as pc boards, battery powered electronics, capacitive power supplies, and high-voltage applications.

SFT37S70-5K491E-F Application Field and Working Principle

The SFT37S70-5K491E-F is a polypropylene film capacitor and belongs to the popular 37S family of capacitors. It is designed specifically for a wide variety of DC and AC applications. These capacitors are particularly suitable for high-frequency applications and are used as DC link capacitors in DC-DC converters, as start-run capacitors in frequency converters, and as motor run capacitors for hermetic compressors.

The SFT37S70-5K491E-F has a capacitance range of 1.8 uF to 10 uF, a voltage rating of 70/50V, and capacitor type of Class I. The features of this capacitor include high stability, low ESR, and high ripple current. The working principle of this capacitor is based on the principle of electrostatic coupling. When a potential difference exists across the plates of this capacitor, charge is stored on its electrically conductive layers.

This capacitor has a cylindrical receiver with the electrodes on both ends, two conductive dielectric layers in the middle, and two nonconductive plastic dielectric layers. The two conductive layers are charged with energy, and the two nonconductive layers act as insulators. The capacitance is determined by the area of the two conductive layers and the thickness of the dielectric layers.

The SFT37S70-5K491E-F is a very versatile capacitor and can be used in a wide range of applications. It is popularly used in power supplies, loudspeakers, audio systems, and for surge protection. It also used in low/medium voltage AC/DC applications and AC electronics. It can withstand operating temperatures of -40°C to 85°C and storage temperatures of -30°C to 150°C, making it suitable for use in harsh environments.

In conclusion, the SFT37S70-5K491E-F is a plastic film capacitor with a wide range of applications. It is designed for high-frequency applications and can withstand a wide range of operating temperatures. Its working principle is based on the principle of electrostatic coupling, and it has two conductive layers and two nonconductive plastic dielectric layers.