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Polymer Aluminum Caps Replace Tantalums in Mobile Devices

March 15, 2017

Murata has developed a polymer aluminium capacitor (PAC) in the popular B case size (EIA 1411) — claimed to be the world's first in this size. The smaller PAC is primarily intended for use in mobile devices such as laptop PCs, thin televisions and AV equipment.

As electronic devices have become smaller, thinner and faster, the need for a physically smaller capacitor for smoothing the inputs and outputs of power circuits has become greater. Until now tantalum capacitors have been the main choice in the B case size, but the new B case size PACs are another choice with desirable low ESR characteristics.

To meet this need, the company developed the smaller PAC. Raising the bar further, the new capacitor also offers 105 degrees C durability, 16V rated voltage and 33uF capacitance. It is specified with a ±20% tolerance on capacitor value, and a maximum ESR rating of 40milliohms. Exhibiting robustness and versatility, it has a useable temperature range of -40 to +105 degrees C. Dimensions of the capacitor are L=3.5mm, W=2.8mm, T=1.9mm.

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