Applied power plays a large role in the life of aluminum electrolytic capacitors. When no power is applied, the electrolyte attacks the aluminum oxide dielectric and lowers the voltage capability of the part. Once powered, the electrolyte is still reducing the dielectric, but the leakage current is working at the same time to reform the dielectric layer and bring the system to a steady state equilibrium.
Choosing the wrong decoupling capacitors can have a significant impact on your circuit design. Because different capacitor technologies vary under different conditions, you need to understand which is best for you.
Products for every power and environment with standard, optimized, and custom designs available. Direct mount IGBT packages available or bus-bar bolt-on style snubbers. Parts with AEC-Q200 qualification are also available.
Automotive powertrains require capacitors that can withstand harsh temperatures up to 200°C and beyond. KEMET offers high temperature options in ceramic, tantalum and aluminum electrolytic dielectrics.
Rubber sealing materials play an important role in aluminium electrolytic capacitors, especially at high voltages and high temperatures. These materials must have outstanding temperature resistance; optimum hardness and mechanical strength for long lasting sealing results; excellent electrical insulating properties; and chemical compatibility with organic solvents and the electrolytes.