M39003/03-3021H Capacitors

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Tantalum capacitors provide designers with a solution for high capacitance in a small case size. The M39003/03-3021H is no exception and offers reliable performance in demanding applications. This tantalum capacitor is made from a tantalum pellet surrounded by a conductive solid electrolyte, creating a modern “hermetically-sealed” construction.

These capacitors are primarily used in high-reliability, transmitting, and aerospace applications. They can also be used in power supply filters, decoupling, and bypassing applications. They feature low ESR and low dissipation factor, which makes them ideal for filtering applications in DC-DC converters. Additionally, for their size, the M39003/03-3021H provides great power handling capability.

The construction of the M39003/03-3021H consists of a tantalum pellet, an anode-side lead wire, a dielectric material, a conductive solid electrolyte, and a cathode-side lead wire which is securely connected to the anode lead by a crimp or spot welding technique. When a voltage is applied to the anode lead, ions of the alkali ions from the electrolyte start to leave the pellet surface toward the anode side, creating a charge storage layer between the anode and the pellet.

The dielectric material used in the M39003/03-3021H is anoxide. It provides for a low dielectric constant and high breakdown voltage. The solid electrolyte acts as an ionic conductor and helps to disperse any excess ionic charge buildup that occur, preventing shorts in the device.

The construction of the capacitor, combined with its dielectric material, provides significant benefits. The aluminum oxide dielectric provides stable capacitance and high breakdown voltage, which can be up to five times higher than other tantalum capacitors. The construction also provides excellent AC frequency characteristics as well as superior voltage ripple characteristics for filtering applications.

The M39003/03-3021H is available in various sizes, including single- and double-anode versions. Single-anode versions are available in capacitances ranging from 0.47 μF to 4.7 μF, while double-anode versions are available in capacitances ranging from 0.47 μF to 150 μF. They have a typical voltage rating of 4V and an operating temperature range from -55 C to +125 C. They have a low ESR and low DF to minimize power losses and improve efficiency.

In summary, the M39003/03-3021H Tantalum capacitor is an excellent choice for high-reliability, transmitting, and aerospace applications, as well as power supply filters, decoupling and bypassing applications. Its construction, dielectric material, and size makes it a reliable capacitor that offers superior AC frequency characteristics, low ESR and low DF, high capacitance, and high breakdown voltage.

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