Download Whitepaper on Equivalent Series Resistance

Equivalent series resistance is the underdog of ultracapacitor specifications. Limelight is often spoken for by Farads and operating voltage and the resulting energy density. However, when deployed for high pulse power loads – the strongpoint of ultracapacitors – ESR has the single strongest impact towards system efficiency and working temperature. These, in turn, determine the percentage of energy that can be retrieved from the ultracapacitor in “real life” and the operating temperature, which is the sole strongest predictor of ultracapacitor lifetime.

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