Revolutionary film capacitors slash weight and size

Revolutionary film capacitors slash weight and size

Technology News |
By Jean-Pierre Joosting

Exxelia has introduced Miniature Micro-Layer™ (MML™) film capacitors, a breakthrough technology that allows significant size and weight reduction thanks to an unrivaled energy density.

MML™ is a revolutionary new technology that provides the highest capacitance per volume in film capacitors available on the market. It delivers an unparalleled energy density of 400 J/dm3 allowing 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.

Further, MML™ capacitors offer high design flexibility, easily enabling low profile configurations.

Several studies have been conducted on actual cases of control and DC-link 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 of under 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 of the increased reliability that film dielectric offers.

With such outstanding properties, new Exxelia MML™ capacitors ideal for power supplies, DC-links, AC/DC/AC power converters, charge/discharge or power generation functions for commercial/military aircraft, satellite platforms and payloads, launchers, defibrillators, downhole tools and any applications involving space constrained electronics.

Key features and benefits include:

  • Miniaturization: Up to 50% size reduction versus other film technologies — matching footprint with stacked MLCC.
  • Lightweight: 50% lighter versus 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 1 μF to 1000 μF.
  • Voltages from 50 V to 1000 V.
  • Operating Temperature -55°C to +140°C.
  • Highly customizable.

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