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KEMET has introduced military-grade ceramic stacked capacitors for use in high-frequency power supplies. The product is commonly referred to as Switch Mode Power Supply Stacked Capacitors, or SMPS Stacked Capacitors.

The product line is qualified to Military Performance Specification MIL-PRF-49470 and DSCC Drawing 87106.

The SMPS Stacked Capacitors are intended for high-reliability SMPS and pulse energy applications. Their low Equivalent Series Resistance (ESR) and Equivalent Series Inductance (ESL) make them ideally suited for input and output filtering of power supply applications as well as snubber applications.

These capacitors are now available in case codes 3, 4, and 5, X7R dielectric, voltage ratings from 50 VDC up to 500 VDC, and capacitance values up to 47 µF. The chip stack is horizontal and the leadframe attachment is a high-temperature solder. They are also available in unencapsulated (unpotted bare chips) or encapsulated (potted assembly) styles. The encapsulated styles are primarily used for applications where increased mechanical and environmental protection is required, such as in avionics systems. The Military performance specification MIL-PRF-49470 is used to establish a baseline part for high-reliability applications.

With an operating temperature range between -55°C and +125°C, and with capacitance shift limited to ±15 percent over that range, these SMPS Stacked Capacitors are an excellent choice for electrical applications, general purpose applications and high-frequency power supply circuits.