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A Quick Look on Film Foil, Axial, Box Type & Non-Inductive Type Capacitors

by Crazzy Paul Digital Markting Professional
Capacitors are categorized based on their performance parameters, uses, applications and the type of dielectric and plating materials used to build them. Find out about 4 different types of capacitors here with all the necessary go-to information.

Film/Foil Capacitor:

These capacitors comprise of two plates of foils made of aluminium that act as electrodes and are separated by the placement of a dielectric film in between. The materials are wound non-inductively to form the section of conductor. A capacitor section has an aluminium foil extending out on either of its sides, to which wire-leads are directly welded. This is where film/foil capacitors derive their name from. A sufficiently thick layer of dielectric is essential in order to provide maximum dependability. The construction of such capacitors is therefore thicker than the rest of the capacitors in the same category.

Advantages of film foil capacitors are that they provide high insulation resistance, improved capacitance stability, better conducting capabilities and low dissipation factor.

Applications include high power or AC voltage, high peaking current, bypassing, lightening ballasts, inverters, energy storage, etc.

Axial Capacitor:

Such capacitors are specifically designed for applications demanding long run life, high degree of vibration resistance and high level of ripple current. Operating temperature goes up to 150 degrees Celsius without deration in voltage. These capacitors can be optimized in their construction to offer customised features based on their application.

Applications of axial capacitors include LED lighting for industrial purposes, telecom infrastructure and automotive power.

Box Type Capacitor:

These capacitors have a very wide range of capacitance as well as high capacitance precision. These are also known as box type high voltage metallised polypropylene film capacitor due to their capability to withstand high voltages. The main features include properties of self-heating, moisture resistance, capacitance stability, longevity and negative capacitance coefficient temperature.

Box type capacitors are used in applications involving DC-Link for up to 1300V. These are also used for PCM mounting with wire configuration which is either 4-lead or 2-lead. Due to their low absorption in dielectric used, these capacitors have minimal heating even in high frequency ranges.

Applications mainly include circuits with high frequencies and temperatures.

Non-Inductive Type Capacitor:

For foil type electrodes, one wound type constitutes non-inductive type capacitor while in vapor deposition electrode type, both wound type and laminated type constitute non-inductive capacitors. Basically, non-inductive type capacitors have terminal electrodes or lead wires attached with end faces. These types of capacitors have lower component of inductance and exhibit frequency characteristics better than their inductive counterparts. The non-inductive capacitors have to go through a process of end spray.

The main features involve winding, metallikon processing, packaging and press forming.

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About Crazzy Paul Professional   Digital Markting Professional

1,591 connections, 12 recommendations, 3,837 honor points.
Joined APSense since, November 14th, 2012, From New Delhi, India.

Created on Apr 19th 2018 01:12. Viewed 666 times.

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