Tantal wired

What are tantalum capacitors?

Tantalum electrolytic capacitors belong to the electrolytic capacitor group and are passive components for electronic circuits. They consist of a porous tantalum metal pellet, which serves as the anode. This is coated with an insulating oxide layer that forms the dielectric, and is surrounded by a liquid or solid electrolyte that acts as the cathode.

Thanks to the very thin and simultaneously highly permittant dielectric layer, tantalum capacitors are characterized by particularly high capacitance in a small volume (high volumetric efficiency) and lower weight compared to conventional electrolytic capacitors.

Why are we replacing tantalum capacitors with multilayer ceramic capacitors (MLCCs)?

There are two main reasons for this:

1. Reliability:
Tantalum electrolytic capacitors tend to emit smoke or even catch fire during short circuits. This poses a significant safety risk and can have fatal consequences for electronic devices.

2. Raw material issue:
Tantalum is a rare metal that is mined in only a few locations worldwide. Political instability in mining regions can therefore quickly lead to drastic price increases and supply bottlenecks. As long as tantalum is needed as a raw material, the risk for manufacturers and users remains.

The solution:
Multilayer ceramic capacitors (MLCCs) represent a reliable alternative. They are significantly less prone to smoke or fire development and do not contain rare metals. This makes them not only safer but also offers more stable prices and supplies.