M39003/03-0168

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Tantalum capacitors are highly reliable and versatile components found within many applications, from mobile phones to medical equipment. The M39003/03-0168 is an example of a tantalum capacitor, and this article will discuss its application field and working principle.

What is the M39003/03-0168?

The M39003/03-0168 is a rectangular shaped metal-oxide semiconductor (MOS) tantalum capacitor. It should not be confused with tantalum electrolytic capacitors which are built in a cylindrical package. The M39003/03-0168 uses a manganese dioxide based electrolyte and has an equivalent series resistance (ESR) of 1.5 ohms. It has an insulation resistance of 200 Mohms per inch and is rated at 16v in the through-hole version. It is designed for high-frequency operation, specifically selected for automobile and medical equipment applications.

Application Field

The M39003/03-0168 is suitable for use in a range of applications, most notably in automobile and medical equipment. Its distinct size and low ESR make it a great choice for low profile, high frequency applications, such as resonant circuits, voltage converters, voltage regulators, switching power supplies and alternators. Due to its high reliability, it is also suitable for use in mobile phones and other types of telecommunications devices.

In medical equipment, the M39003/03-0168 is often used in diagnostic devices, electro-mechanical systems and medical control systems. It is highly resistant to corrosion, allowing it to be used in equipment that needs to be able to withstand long term operation in damp environments. Its low ESR allows it to handle capacitor ripple current without producing a large voltage drop, making it an ideal choice for these applications.

Working Principle

The M39003/03-0168 capacitor works on a process known as electrostriction, where an electric field will cause a dielectric material to swell and reduce in volume. This process causes the capacitor to store charge, and thus act as a capacitor. The capacitor works by allowing the flow of both positive and negative charges at the same time.

When an applied current enters either side of the capacitor, it causes an electric field to form between the positive and negative terminals. This causes the dielectric material to swell and reduce in volume, thus storing charge. When voltage is removed, the capacitor will discharge as the dielectric forces the charges away from each other, creating a reversed electric field. This process is known as electrets and is the fundamental principle of how the M39003/03-0168 capacitor works.

Conclusion

The M39003/03-0168 is a reliable and efficient tantalum capacitor suitable for use in a range of applications, most notably in automobile and medical equipment. It works on the principles of electrets and electrostriction, allowing it to store charge and discharge efficiently. Due to its low ESR, it is capable of handling high frequency signals, making it a great choice for small profile applications.

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