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MDL: CDE introduces DC Link Capacitor Modules for Large Inverter Systems

November 12, 2018

CDE introduces DC Link Capacitor Modules for Large Inverter Systems

Liberty, SC (November 12,2018) — 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.

Cornell Dubilier’s MDL series modules are available by special order. For inquiries, contact: Jorge Chavez, Product Marketing Manager,, (508) 996-8564. For more information on this series visit: Data Sheet:


Note to Editors: Since its founding in 1909, CDE has been dedicated to advancing capacitor technology for new applications. The company combines innovative products with engineering expertise to provide reliable component solutions for inverters, wind and solar power, electric vehicles, power supplies, motor drives, HVAC, motors, welding, aerospace, telecom, medical equipment and UPS systems. A global company, Cornell Dubilier has ISO-9001 certified manufacturing and distribution facilities in Liberty, SC; New Bedford, MA; Mexicali, Mexico; and Hong Kong.

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