By Caroline Hayes 20th December 2021
Miniature micro-layer (MML) film capacitors offer energy density of 400j/dm3 for weight and size reductions compared to polypropylene or polyester dielectrics. The capacitors developed by Exxelia are available from New Yorker Electronics.
They also have an increased operating temperature up to 140°C and transient voltage protection. Capacitance ranges from 1μF – 1000μF and voltages from 50V – 1,000V. Operating temperature range is -55°C to +140°C.
Studies on use-cases of controls and DC-links functions for aircraft applications have shown around 50% reduction in size and weight compared to other film technologies, says the company. Compared with multi-layer ceramic capacitors (MLCCs), there is a 70% – 90% weight reduction with no capacitance derating with voltage applied and a low drift < 5% through the temperature range. As a result, applications using clusters of stacked MLCCs can now be replaced by a single MML unit.
Typical applications are 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 where space is limited.
Samples are available now request.
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