CDE introduces DC Link Capacitor Modules for Large Inverter Systems

Cornell Dubilier has announced a new series of DC link polypropylene film capacitor modules aimed at high-power inverters. The MDL series offers capacitance values ranging from 600 µF to 4,200 µF, with applied voltages of 900 Vdc to 1,300 Vdc.

Designed as an alternative to banks of cylindrical bus-mounted capacitors, these modules have higher energy density and simplify bus connections by reducing the number of terminations. By using a single DC Link capacitor in a compact rectangular package, smaller inverter topologies are possible. The use of one capacitor versus several parallel-banked capacitors typically results in enhanced system reliability with lower assembly costs. The MDL series also features long life, meeting a 5,000 hour life test at rated voltage, with a core temperature of 85°C. This translates to a life of 200,000 hours when operated at a 60 °C ambient at full rated voltage and ripple current.

The MDL series is based on CDE’s well proven DC Link film technology utilizing low-loss, high-grade polypropylene dielectric. Featuring current ratings up to 400 Arms these modules are well suited for high-power inverters used in commercial and utility-scale wind, solar and fuel cell systems. Other applications include UPS, switching power supplies and large motor drives.

The series consists of 12 values in 4 case sizes, is RoHS compliant, and meets IEC 61071 and UL94V-0. Each unit passes through CDE's industry-leading 100% burn-in testing.