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Archive >  July 2013 Issue >  New Products > 

Capacitors for Large Inverter Systems from CDE
High capacitance for inverter systems.
Liberty, SC — Cornell Dubilier has introduced its Type 948D high-energy-density DC link capacitors for larger inverter systems. Type 948D is an excellent choice for DC link applications where high bus voltage, high capacitance and high ripple current are required for smoothing and filtering.
Housed in a plastic rectangular package that is nearly a cube with 6.5-in. (165mm) sides, the new capacitors offer up to 20 percent more capacitance in the same size case with lower ESR and higher ripple current ratings than do competitive types. Since a fused, segmented metallization pattern is used, the capacitors offer greater open circuit protection and superior control of capacitance loss than competitive types. The pattern is deposited on a low-loss, high-grade polypropylene dielectric.

Built-in fuse links limit capacitance loss to a small segment within the capacitor in lieu of the larger areas of uncontrolled capacitance loss observed with non-segmented types.

Available in 990 to 2700µF and rms current ratings up to 160A, the Type 948D DC link capacitors are offered in voltage ratings ranging from 800 to 1300VDC. The heavy duty M10 threaded studs are used to connect the high current terminals to the inverter's bus According to the company, the capacitors have a 200,000 hour life expectancy at nameplate ratings of current, voltage and temperature, so that excel at providing reliable filtering and smoothing for today's demanding applications in inverters for wind and solar energy, electric vehicles, motor drives, and UPS systems.

Contact: Cornell Dubilier Electronics, Inc., 1605 East Rodney French Blvd., New Bedford, MA 02744-2294 508-996-8564 Web:

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