Tantalum Capacitor Alternatives

摘要

High Capacitance Voltage, low ESR, volumetric efficiency, low leakage current, reliability, multiple sources, very efficient noise filtering characteristics. These are some factors why tantalum capacitors have been selected for filtering in power supplies and other applications. However, due to the recent industry trends, tantalum capacitors suffered long lead times, and escalated pricing. Reports of one year lead times for the high Capacitance Voltage tantalum capacitors were common. Reliability also becomes a concern for both radial and surface mount capacitors. Accelerated thermal runaway and excessive leakage current are common failure modes. Following the manufacturer's recommended application guidelines counter act the low ESR feature of tantalum capacitors. Typical applications consist of power supplies where low ESR is critical. Due to delivery, price, and reliability concerns, are there tantalum capacitor alternatives?