Verified Nov 2026
Metal Fabrication
·
Liberty, South Carolina
·
Since 1933
Cornell Dubilier manufactures power capacitors for industrial, medical, military, aerospace, automotive, and renewable-energy applications. Headquartered in Liberty, South Carolina, and founded in 1933, the company employs 500-1,000 people with estimated revenue of $100-250 million. Owned by Knowles Corporation as of 2023, it produces aluminum electrolytic, film, mica, and supercapacitor technologies, including DC-link capacitors engineered for electric vehicle chargers and extended thermal cycling.
Cornell Dubilier - Manufacturer of Power Capacitors at a glance
Revenue
$100-250M
Est. band
Employees
500-1,000
Founded
1933
Headquarters
Liberty, South Carolina
Certifications
AS9100 · ISO 9001
Industries
Automotive
Electric Vehicles
Electronics
Medical
Military & Defense
Renewable Energy
STABILITY SIGNALS
Established & active
93 years in operation (founded 1933).
Holds AS9100, ISO 9001 certification(s) per public sources.
Overview
Cornell Dubilier manufactures power capacitors for industrial, medical, military, aerospace, automotive, and renewable-energy applications. Headquartered in Liberty, South Carolina, and founded in 1933, the company employs 500-1,000 people with estimated revenue of $100-250 million. Owned by Knowles Corporation as of 2023, it produces aluminum electrolytic, film, mica, and supercapacitor technologies, including DC-link capacitors engineered for electric vehicle chargers and extended thermal cycling.
At a glance
Attribute | Detail |
|---|---|
Founded | 1933 |
Headquarters | Liberty, South Carolina |
Employees | 500-1,000 |
Revenue | $100-250M (estimated) |
Primary capability | Metal Fabrication |
Certifications | AS9100 · ISO 9001 |
What Cornell Dubilier - Manufacturer of Power Capacitors makes
Cornell Dubilier holds AS9100 and ISO 9001 certifications and manufactures aluminum electrolytic, film, mica, and supercapacitor technologies with low inductance designs for power conversion and EMI/RFI suppression.
Products and capabilities described on the company's own site include Aluminum, Electronics, Welding, Lighting (source: cde.com).
Certifications
Cornell Dubilier - Manufacturer of Power Capacitors is associated with the following certifications in public sources. Confirm the certified scope for the specific plant producing your part:
Latest developments
2026-11-05 — cornell dubilier responds to needs of next gen ev charger designe (forpressrelease.com)
2026-11-05 — cornell dubilier electronics expands dgh and dsf supercapacitor o (forpressrelease.com)
2026-10-08 — new yorker electronics releases long life dc link capacitors from (forpressrelease.com)
2026-05-29 — Cornell Dubilier Electronics / Knowles - Marsh Bell (marshbell.com)
2025-08-18 — DC-link capacitors meet 2000-hour THB testing - Power Electronic Tips (powerelectronictips.com)
2025-06-11 — M&A Case Study - Sale of Capacitors Company for $263M - Ludwig Business Consultants (ludwigconsultants.com)
Facilities
Cornell Dubilier - Manufacturer of Power Capacitors is headquartered in Liberty, South Carolina. Public sources also reference these locations:
Liberty, SC — hughespeters.com
Company details
The company operates as a wholly owned brand under Knowles Corporation and serves over 35,000 customers across a global network of certified facilities. Cornell Dubilier - Manufacturer of Power Capacitors was founded in 1933, has an estimated 500-1,000 employees, and is headquartered in Liberty, South Carolina. On the LightSource stability read it is rated "Established & active": 93 years in operation (founded 1933). Holds AS9100, ISO 9001 certification(s) per public sources.
Frequently asked questions
What does Cornell Dubilier - Manufacturer of Power Capacitors make?
Cornell Dubilier manufactures power capacitors for industrial, medical, military, aerospace, automotive, and renewable-energy applications. Headquartered in Liberty, South Carolina, and founded in 1933, the company employs 500-1,000 people with estimated revenue of $100-250 million. Owned by Knowles Corporation as of 2023, it produces aluminum electrolytic, film, mica, and supercapacitor technologies, including DC-link capacitors engineered for electric vehicle chargers and extended thermal cycling.
Where is Cornell Dubilier - Manufacturer of Power Capacitors headquartered?
Cornell Dubilier - Manufacturer of Power Capacitors is headquartered in Liberty, South Carolina (140 Technology Place, Liberty, South Carolina, 29657).
When was Cornell Dubilier - Manufacturer of Power Capacitors founded?
Cornell Dubilier - Manufacturer of Power Capacitors was founded in 1933.
How big is Cornell Dubilier - Manufacturer of Power Capacitors?
Cornell Dubilier - Manufacturer of Power Capacitors has an estimated 500-1,000 employees, with revenue in the $100-250M range (estimated).
What certifications does Cornell Dubilier - Manufacturer of Power Capacitors hold?
Cornell Dubilier - Manufacturer of Power Capacitors lists AS9100 · ISO 9001 on its website. Confirm the certified scope for the specific plant producing your part.
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