Power film capacitors for power factor correction and AC filtering

March 21, 2014 // By Graham Prophet
Featuring a dual safety system, FLB Series capacitors exhibit high contact reliability, high ripple current, and extremely high dielectric strength, as well as offering higher rated voltages than comparable technologies

AVX’ FLB series medium power film capacitors come packaged in a cylindrical aluminium can with terminals that enable direct, three-phase, internal wire connection. FLB series capacitors are fabricated with metallised polypropylene dielectric combined with a soft polyurethane resin. FLB series capacitors feature a dual safety system consisting of an overpressure disconnector and self-healing technology, as well as exhibiting high ripple current and extremely high dielectric strength in operating temperatures spanning -40°C to +80°C. Applications for the series include: power factor correction and output AC filtering in power converters, UPS systems, solar and wind inverters, and motor drives.

The FLB series of three-phase, medium power film capacitors are available in nine case sizes, six voltages spanning 230-690VAC, capacitance values spanning 3*20.3µF to 3*335µF, and three capacitance tolerances (±5%, ±10%, ±20%). Optimised for AC voltage performance, the series also exhibits high overvoltage capabilities as a result of its self-healing properties. Additionally, unlike aluminium electrolytic capacitors, FLB series polypropylene capacitors do not have a catastrophic failure mode, as film capacitors simply experience a parametric loss of capacitance of approximately 5%, which both negates the risk of short-circuiting and enables continued functionality. Lifetime for the series is 100,000 hours at rated voltage and 70°C.

AVX; http://avx.com/docs/Catalogs/FLB.pdf