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API Capacitors

About Us

We are… innovative, proven, reliable and trusted.

API Capacitors is the UK’s leading designer and manufacturer of high quality power capacitors for power electronic applications.
Our extensive range of filter, snubber and energy storage capacitors services the professional markets of traction, industrial drives, power conditioning and avionics, together with discharge capacitors for medical, plasma and pulsed power applications.

Our customer base includes all the major European and North American blue chip companies involved in the power electronic sector.

The strength of the company lies in working alongside its customers, understanding their requirements and tailoring the product correctly to specific applications to ensure that it performs exactly as required with total reliability.

We operate a full ISO9001 quality system and have IRIS accreditation.

API Capacitors is not a standard capacitor provider – we provide an engineered solution and have a full R&D and rapid prototyping capability to allow us to provide speedy, cost effective application specific solutions for product development and obsolescence situations. In addition if you choose API Capacitors as your partner your custom design will not be sold to others.

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Rail Traction

API Capacitors Ltd can pride itself on supplying capacitor products to many Train manufacturers, operators and maintenance depots throughout the world since its inception in the 1980s.

Our capacitor products are utilised in a variety of applications on board many electric, diesel electric locomotives, multiple units, metro systems and tramways.
We have an impressive project reference list which includes all of the market leaders in the traction field.Over the years API has drawn on these experiences enabling us to design and engineer world class products at our British manufacturing facility in the heart of the picturesque county of Norfolk, England.

Our designs utilise high quality raw materials sourced from leading specialists in their respective fields, to produce high quality capacitors for use in GTO based traction systems and the more modern IGBT based systems also many other related electrical systems, including the main traction and auxiliary converters/inverters. The traction range includes snubber, AC harmonic filters, commutation capacitors, DC link and other tuned and filtering capacitor products. All of these products are available in a variety of case styles and materials with bus bar style or more conventional terminations.

APIC manufacture and design all our products and incorporate compliance with the associated European and applicable rail standards. We operate our business within an ISO 9001 framework, of which we have further extended by our IRIS accreditation, reinforcing our status as credible supplier of capacitor components into the worldwide rail marketplace.

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