About Us

Where innovation meets electrical excellence

We are the leading UK designer and manufacturer of high-performance power capacitors.

Our success is based on technical innovation, expert knowledge and focussed research and development. We work closely with our customers to fully understand their current and future requirements.

We are UKAS ISO 9001 2015 quality management certified and have an established reputation for technical excellence, quality and reliability.

BACKGROUND

The company, which in 2012 became part of the API Group of Companies, was previously a part of STC (Standard Telephones and Cables Ltd). STC was formed in London as Western Electric in 1883 giving the company over 100 years of heritage.

API Capacitors is managed and directed by professional engineers and is focussed on improving the performance of our customers by assisting them to reduce operating costs, increase equipment life, improve process efficiency and improve reliability.

API Capacitors is a high mix, low volume (HMLV) manufacturer with the option within our group's new manufacturing site to facilitate volume manufacturing requirements. We strive to achieve consistent high quality and reliability. Our capacitors have a failure rate which is significantly lower than the industry standard.

We have been successful in developing a customer base in the UK, mainland Europe, North America, Africa, Middle East and Asia, with over 70% of our turnover from export markets.

API Capacitors manufacturing facility in Great Yarmouth, UK

OUR COMPANY'S HISTORY

Early 20th century

The capacitor business was separated from STC

Becoming Norfolk Capacitors Ltd, continuing operations from the established Great Yarmouth manufacturing facility while retaining much of the workforce, expertise and product portfolio.

1986–2012

Norfolk Capacitors Ltd entered administration.

17 October 2012

API Capacitors continued production from the historic Great Yarmouth site

Ensuring continuity of supply and support for existing Norfolk Capacitors customers.

2013

Moved into new head office

Group acquired a 8540m2 Head Office in Norwich where our design team are based.

STC (Standard Telephones and Cables)

Established capacitor manufacturing operations in Great Yarmouth as part of its wider electrical and telecommunications manufacturing business.

1986

Norfolk Capacitors built an international reputation

Designing and manufacturing high-performance power capacitors, supplying customers in rail traction, industrial drives, defence, medical equipment, plasma systems and power electronics.

October 2012

The business and assets of Norfolk Capacitors were acquired by API Capacitors Ltd

Preserving the manufacturing operation, employees, intellectual property and customer relationships.

2012

API Capacitors expanded the product range

And strengthened its position as a UK manufacturer of custom-engineered power capacitors for rail, industrial, energy, defence, aerospace and medical applications.

2024

FACILITIES

The business operates from a 2000 square meter manufacturing facility in Great Yarmouth, UK which has excellent road links and is near to several major UK ports and airports. More recently the Group has acquired an 8640 square meter manufacturing facility in Norwich UK, with plans to setup a production line for volume production.