Guide to 'trashing' tantalum chips

10 April 2002 Passive Components

An important document for design engineers, Chip monolithic ceramic capacitors as alternatives for chip tantalum capacitors, is the title of a new Murata publication aimed at tantalum users.

The main reason for continuing to use tantalum (Ta) devices has been that they offered values up to 100 µF, in smaller sizes than multilayer ceramic chips (MLCCs). Murata's new catalogue shows that this is no longer true. Ta values up to 220 µF can be replaced with MLCCs. Because of the ESL/ESR characterisics of the ceramic dielectric, MLCC values of 1/10 to 1/2 of the Ta value can be used to get the same result.

The content of the catalogue includes everything an engineer needs to make the change from Ta to MLCC: comparisons of size, capacitance and ESR vs frequency, noise absorption, breakdown voltages, capacitance vs temperature, self-heating vs ripple current and more.

For a copy contact Avnet Kopp, 011 444 2333, [email protected], www.avnet.co.za

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