Industry-leading low-resistance soft-termination MLCCs in 3225 case size

TDK Corporation has expanded its CN series of low-resistance soft-termination MLCCs. This product accomplishes an industry-leading 22nF capacitance in the 3225 case size (3.2mm x 2.5mm x 2.5mm – L x W x T) and C0G characteristics at 1000V. Mass production of the product series has begun. The capacitors of the series are industry-first products that are equivalent to regular products in terms of their terminal resistance due to the optimisation of their resin electrode structure.

In recent years, there has been an expansion in the use of multiple resonance capacitors placed in series-parallel circuits for resonance applications such as LLC resonant circuits and wireless charging. As applications become more powerful, they require more resonance capacitance, which raises the demand for high-voltage, large-volume capacitors. To improve reliability in these applications, components with resin electrodes effectively prevent placement cracks resulting from external stress. However, the increased resistance value of resin electrodes has been an issue.

This led the company to develop the CN series with optimised resin electrode structures, resulting in extremely lower resistance values. In addition to the low losses and capacitance stability over temperature and voltage variations of C0G products, these resin electrode structures achieve high reliability against external stress and reduced loss, making them excellent for use as resonator and snubber capacitors.

The optimisation of product and process designs has made it feasible to manufacture these products, which helps increase reliability and extend their application to high-voltage circuits, thereby enhancing the reliability of the applications. The company will continue to expand its product line to meet the needs of its customers.