Capacitor sealing performance

Why do capacitors need to be sealed?

They must provide sealing and mechanical, thermal and chemical resistance. Capacitors can be damaged in many ways, including internal faults or external overloads that can cause an explosion, especially in devices like AC film capacitors with relatively high energy content.

How strong are heavy duty capacitors?

In summary, we can highlight the strength of the Heavy Duty capacitors, a reliable unit that permanently supports 1.8 times the rated current and up to 2.5 times RC for short time, reaching an inrush current of up to 400 times RC, and guaranteeing a long lifetime of up to 150,000 hours.

Why is the capacitor market so complex?

The capacitor market is complex, with many product geometries, designs, properties and applications. New technologies and the demand for improved productivity levels have a high impact on the materials used for the construction of capacitors. These materials must meet the rigorous demands of the industry.

How does a capacitor heavy duty work?

In this regard, CIRCUTOR Heavy Duty capacitors are equipped with a pressure relief protection system, which acts in the event of an increase in its internal pressure simply a higher value than 506 hPa approximately (0.5 bar), disconnecting the capacitor from the mains as shown in the figure 2.

What is a film & foil capacitor?

Film and foil capacitors are typically potted for internal protection with a very soft, gel type material. ELANTAS Europe offers a broad portfolio of epoxy and polyurethane compounds to ensure the safety and reliability of these capacitors, ranging from very soft to rigid and stiff materials. Self-extinguishing Behaviour Thermal Resistance

How long does a polymer capacitor last?

The aluminum capacitors made with our new polymer were stressed in a surge test by applying voltage cycles of 10s on/10s off with a peak current of 80A in each cycle. The capacitors withstood up to 2000 cycles while capacitors made with a state-of-the-art polymer dispersion showed significant capacitance loss already after 500 cycles (Fig. 6).