Medium cells 100F - 700F

Advanced cell types: high performance in a small space

Various categories were defined when ULTRACAP have been introduced. The classi­fication of medium power cells started with capacities above 100F - 400F. Over the years medium size super­capacitors were expanded until they reached a capacity of around 700F. This was achieved by improved carbon and graphene admixtures as well as more modern electro­lytes, which were able to achieve larger capa­cities in almost identical designs. Despite varying heights, the dia­meters of the cups remained between about 20 and 35mm, resulting in a cost-effective and powerful class due to high stan­dardi­sation and contacting.

However, limits are set by the ESR, which is difficult to push below 1.5 mΩ while maintaining the cost structure. Better ESR perfor­mance is only achieved with the next higher category cells, especially with 60 mm cell technology.