M39003/01-7372/HSD

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Tantalum capacitors are popular passive components used in a wide range of applications. In particular, the M39003/01-7372/HSD series of capacitors is a popular choice for high power circuits where stability, long life, and high capacitance are must-haves. This guide will discuss the application field and working principle of these capacitors.

Application Field

The M39003/01-7372/HSD capacitors, known as the “Rolling Plug” due to their unique cylindrical design, are designed for high-power snubber circuits and charge pumps. They are used to store electrostatic energy in computer hardware systems such as CPUs and GPU memories. They are also used in pulse-generating circuitry and are used in high-speed communications networks, automotive and avionics, and in other demanding applications.

Due to their high electrical breakdown voltage rating, these capacitors are often used as pulse-forming networks where a certain amount of electrical energy is needed in a short amount of time. Additionally, because of their low impedance, they can be used as voltage-divider networks that allow power to flow in one direction. These capacitors can also be used as energy sources in high-frequency switching circuits.

Working Principle

The M39003/01-7372/HSD capacitors are tantalum capacitors, meaning they use tantalum for the anode, and an electrolyte liquid for the cathode. Tantalum provides good thermal and electrical properties, and the electrolyte provides lower electrical leakage than other capacitor types, making it an ideal material for high-power applications.

Tantalum capacitors are polarized because the capacitor will only store charge when its positive and negative terminals are connected correctly. It is important to keep in mind that tantalum capacitors require some form of biasing, meaning that they must be connected directly to the power rail in order to function correctly. This is why they must not be connected to other components in a circuit.

Once the capacitor terminals are connected to the power rail, electrons flow from the anode to the cathode through a small “conformal layer” of tantalum oxide. This conformal layer is formed when the capacitor is first connected to the power rail and prevents the capacitor from shorting to other components in the circuit.

When voltage is applied across the capacitor terminals, the electrons move through the conformal layer to the cathode and create a stored electric charge. As the voltage is increased, more electrons pass through the conformal layer, and the charge stored in the capacitor increases. Eventually, when the voltage reaches a certain level, the capacitance is saturated and no more charge can be stored.

Tantalum capacitors like the M39003/01-7372/HSD series provide outstanding performance in a wide range of applications, from voltage dividers to high-power snubber circuits. As long as the capacitor is connected correctly and its performance parameters are within the required limits, it can provide stable operation and a long operating life. The M39003/01-7372/HSD capacitors are a great choice for industrial, automotive, and avionics applications.

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