TDK soft-termination MLCCs have low ESR

TDK soft-termination multilayer ceramic capacitors

TDK has developed what it claims is the industry’s first soft-termination multilayer ceramic capacitors (MLCCs) with low ESR. The CN devices have terminal electrodes with a conductive resin layer that provides high mechanical robustness to protect against board flexure.

At the same time, the MLCCs have a low ESR that is comparable to that of conventional MLCCs.

Capacitance values range from 2.2 to 22µF and rated voltages from 16 to 100V.

Based on X7R dielectric material, commercial grade and automotive grade types of the MLCCs are available. The latter are qualified to AEC-Q200. Mass production and sales of the first types were launched this month.

Soft-termination MLCCs, which can withstand the stress from board flexure, are an effective way to prevent short circuits when used in battery lines. Conventional designs that coat the electrodes completely with resin, however, lead to higher ESR and losses.

TDK has achieved the low terminal resistance values by applying the conductive resin layer only where the terminal electrode comes into contact with the PCB. Thanks to the low resistance of the terminal electrodes, these MLCCs are suitable for battery lines in automotive and industrial robot applications, where they help to improve system reliability.

The capacitors can also be used in automotive ECUs, adas and automated driving systems. Dimensions are either 3.2 by 1.6 by 1.6mm or 3.2 by 2.5 by 2.5mm.

www.global.tdk.com

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