Passives

Film capacitors enable design flexbility

21st December 2021
Mick Elliott

Availability of the new Exxelia Miniature Micro-Layer (MML) film capacitors has been announced by distributor New Yorker Electronics.

Exxelia describes the series as a breakthrough technology that allows tremendous size and weight reduction thanks to its high energy density.

According to Exxelia, the new MML line boasts an unparalleled energy density of 400 J/dm3.

It allows for a substantial size/weight reduction compared to traditional Polypropylene or Polyester dielectrics, with an increased operating temperature up to 140°C and transient voltage protection.

These capacitors offer a large flexibility in design by 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 now be replaced by a single MML unit of similar size, with all the increased reliability that film dielectric offers.

Exxelia’s 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.

Features include capacitance from 1μF to 1000μF, and voltages from 50V to 1000V.

The devices are highly customisable.

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