Capacitors for PSU, DC, & pulse applications use polypropylene film for longevity

May 23, 2014 // By Graham Prophet
Rated for 0.01 µF to 0.47 µF and 250V to 2000V, FM Series medium power film capacitors exhibit high reliability, high capacitance stability, low losses, self-healing properties, and long lifetimes

AVX’s FM Series medium power film capacitors are non-inductively wound with dry, metallised polypropylene film dielectric; are encapsulated in a flame retardant plastic case sealed with self-extinguishing, thermosetting epoxy resin and feature RoHS-compliant double metallised polyester film electrodes in series construction. FM Series capacitors exhibit high reliability at high current stress, high dv/dt capability, high moisture resistance, high capacitance stability, low losses, self-healing properties, and long useful lifetimes. Rated for capacitance values spanning 0.01 µF to 0.47 µF, voltages spanning 250V to 2000V, and operating temperatures spanning -40°C to +105°C, the FM Series capacitors are designed for high frequency and high pulse rise-time circuits, high voltage power supplies, switch mode power supplies (SMPS), power converters, snubbers, and electronic lighting ballasts, such as compact florescent lamps and LEDs.

FM Series medium power film capacitors are available in 17 case sizes (A-S), 14 voltages (250-2000V), three capacitance tolerances (±5%, ±10%, and ±20%), and two lead lengths (3.5 mm and 22 mm). Unlike aluminum electrolytic capacitors, FM Series film capacitors do not have a catastrophic failure mode. Instead, FM Series capacitors simply experience a parametric loss of capacitance of approximately 2% from their initial value, eliminating the risk of short circuit and enabling continued functionality.

AVX; www.avx.com/docs/Catalogs/FM%20_4.pdf