Component Management

Exxelia revolutionary MML energy density film capacitors

12th November 2021
Tom Anstee

Exxelia a manufacturer commited to demanding markets introduce Miniature Micro-Layer (MML) capacitors, a breakthrough technology alllowing size and weight reduction. 


MML is a revolutionary technology that provides the highest capacitance per volume in film capacitors available on the market says the company.

Why is it a game changer? Because an unparalleled energy density of 400 J/dm3 allows for a tremendous reduction in size and weight compared to traditional Polypropylene or Polyester dielectrics, together with an increased operating temperature up to 140°C and transient voltage protection.

Besides, MML capacitors offer a large flexibility in design, easily allowing low profile configurations.

Several studies have been conducted on actual cases of controls and DC-Links functions for aircraft applications. All have shown about 50% reduction in size and weight compared to other film technologies.

The comparative picture with MLCC is even more flattering, as it demonstrates between 70% to 90% reduction in weight, while showing no capacitance derating with voltage applied and a low drift < 5% through the temperature range. Applications using clusters of stacked MLCCs can be replaced by a single MML unit of similar size, with all of the increased reliability that film dielectric offers.

With such outstanding properties, Exxelia new MML capacitors are perfectly suitable for power supplies, DC-links, AC/DC/AC power converters, charge/discharge or power generation functions of commercial/military aircraft, satellite platforms and payloads, launchers, defibrillators, downhole tools and any applications of confined electronics. Samples are readily available on request.

Features & Benefits

● Miniaturisation of the function : Up to 50% size reduction vs other film technologies; matching footprint with stacked MLCC

● Lightweight : 50% lighter vs other film technologies; 80 to 90% lighter than ceramic

● No capacitance derating in voltage, stable in temperature (<5% drift through the temperature range)

● Capacitance from 1μF to 1000μF

● Voltages from 50V to 1000V

● Operating Temperature -55°C to +140°C 1/2

● Highly customisable

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