155MWR400K

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Film Capacitors

Film capacitors are a type of capacitors built on the basis of a film dielectric layer. This type of film capacitor uses a film that has been treated and metallized or plated with electrodes. These capacitors are constructed by laminating the films into layers and then stacking them onto a solid or partially hollow cylindrical core. Their main application is filtering and bypassing. High quality metalized film capacitors are used widely in a variety of applications, with specific advantages for EMI/RFI suppression and pulse handling.

155MWR400K application field and working principle

The 155MWR400K film capacitor is a high voltage tight tolerance Metalized Polypropylene film capacitor with radial leads for PC board mounting. This capacitor has self-healing properties and can handle pulses of high rate of rise without failure due to its high Insulation resistance. It also has excellent surge current capabilities, making it ideal for use in high voltage motor drives, advanced power electronics applications, and medical equipment.

The working principle of the capacitor is based on the dielectric properties of the polypropylene film material used to build the capacitor. This material acts as an insulator between the two metal layers which are coated onto either side of the film. When a voltage is applied across the film, an electric field is generated between the two layers, resulting in an electric charge being stored. This creates a capacitance in the capacitor, allowing it to store energy for short periods of time.

The 155MWR400K capacitor has wide application fields. It is used primarily in power line conductors in motor applications, such as motor starters, inverters, servo or linear drives. It is also widely used in medical and industrial power supplies for voltage regulation and noise suppression. In addition, it is often used in pulse width modulation (PWM) and pulse-with-modulation-Mode (PAMM) applications. The 155MWR400K capacitor is also used in high power applications, like high voltage power converters and resonant circuit designs.

The advantage of the 155MWR400K capacitor lies in its temperature stability and low dissipation factor. Due to its metalized construction and extremely thin dielectric layer, it has very low leakage current, which keeps it from overloading or shorting out. The voltage rating and capacitance values for this series of capacitors are stable across a wide temperature range, making the device ideal for applications that require reliable performance in extreme environments.

The 155MWR400K capacitor also has excellent pulse handling performance. Its low ESR and low inductance ensure transient performance that is insensitive to frequencies. The low ESR also renders it highly resistant to surge and ringing. The relatively small size of the device allows it to be employed in a variety of applications, with minimal power dissipation allowing for energy efficiency.

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