M39003/09-0049H

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Tantalum capacitors are essentially electrolytic capacitors with a tantalum anode and a metallized film, paper or electrolyte cathode. Due to the high electrochemical reaction rate of tantalum, it has a higher capacitance than other electrolytic capacitors, yet at the same time it has an extremely low ESR (Equivalent Series Resistance). This brief explanation provides a basic overview of the M39003/09-0049H application field and working principle.

M39003/09-0049H Application Field

The M39003/09-0049H is a wet/conformal-coated tantalum capacitor with a radial-lead construction. The capacitor is constructed with a Tantalum anode machined from high purity anode powder with a High Temperature Polymer (HTP) encapsulation and an electrolyte-impregnated Nichicon Wet/Conformal coating. The anode is attached to the electrolyte-impregnated Class-2 Ceramic Coil sleeve type cathode via a controlled Curie Temperature (CT) bonding process.

The M39003/09-0049H is specifically designed for aerospace and military applications requiring conformal-coated, high temperature, wet/conformal-coated capacitors. The high temperature operation and ESR (Equivalent Series Resistance) performance of these capacitors make them well suited for use in temperature-critical environments. This series is also available in several styles and sizes to meet the needs of various applications.

M39003/09-0049H Working Principle

The construction of a typical Tantalum capacitor begins with a sintered anode made from tantalum powder. The powder is sprayed onto an insulating substrate, which is then placed in an oven for sintering. This process fuses the tantalum powder together, creating a solid pellet of tantalum. The anode is then attached to a Class-2 ceramic coil or sleeve type cathode via a CT (controlled Curie Temperature) bonding process. The cathode is coated with an electrolyte-impregnated Nichicon Wet/Conformal coating and then encapsulated in a high-temperature polymer (HTP) to provide additional protection.

The anode and cathode are then immersed in an electrolyte solution and connected via a DC voltage source. When the voltage is applied to the capacitor, an electrochemical reaction occurs between the anode and cathode, forming an electrochemical double-layer capacitor or EDLC. As current is applied to the capacitor, ions generated from the electrolyte move to the anode and accumulate there, creating a charged layer of electrons, known as the electrical double layer. This double layer provides the capacitance of the capacitor.

The use of this type of capacitor provides several important benefits; such as increased capacitance, low ESR, low impedance, and stability at high temperatures. Additionally, the conformal-coated construction of the M39003/09-0049H makes it ideal for applications requiring an added layer of protection, such as Aerospace and military electronics.

In summary, the M39003/09-0049H is a specialized type of tantalum capacitor designed for high temperature, wet/conformal-coated applications requiring a high degree of protection and performance. The capacitor is constructed in a specific manner, with a high purity Tantalum anode, a Class-2 ceramic coil/sleeve type cathode and an electrolyte-impregnated Nichicon Wet/Conformal coating. The combination of its construction and electrochemical reaction provide the capacitor with excellent performance, such as high capacitance, low ESR, low impedance, and stability at high temperatures.

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