Please note we are still adding products to our new website. Can't see the product you need? Contact us on 01444 243 452 /

September 2021 – Capacitors

Published on: 17/09/2021

Tailored and reliable solutions for industry-leading capacitors

API Capacitors at GD Rectifiers

GD Rectifiers is one of the UK’s leading distributors of capacitors for power electronics, offering an extensive range of filter capacitors, snubber capacitors and energy storage capacitors. GD Rectifiers service a large range of markets including rail traction, industrial drives, power conditioning and avionics, alongside discharge capacitors for medical, plasma and pulsed power applications.


GD Rectifiers partners with API Capacitors to offer customers industry-leading capacitors and tailored, reliable solutions to suit their applications.

API Capacitors specialise in the design and supply of dry film and silicone oil impregnated capacitors using the latest design principles and manufacturing technology. API Capacitors’ strength lies in working alongside its customers, tailoring capacitors to their specifications and applications so they can offer total reliability.


API Capacitors is a leading UK designer and manufacturer of high quality power capacitors for power electronic applications. They can also reverse engineer chosen capacitors, where an engineer will begin with the final product and work backwards through the design process until they reach the initial design specification. This process can be completed manually or by using computerised methods. Reverse engineering offers the opportunity to develop and improve products without needing to start from scratch, saving companies and engineers a large amount of time and money.


GD Rectifiers works with API Capacitors to offer customers equivalents to current and obsolete capacitors including, but not limited to: NWL, EPCOS, TDK, Vishay and Electronicon. API offers replacement designs to discontinued power capacitors using metallised film and film/foil technology.


Recent Capacitor Case Studies 

1)   Eurostar International Class 373 Locomotives – API Capacitors successfully undertook the design and production of an all thin dielectric film capacitor to replace a bank of Siemens Electrolytic capacitors used on the auxiliary converter (hotel load converter) circuits on the trains. These particular capacitors provide the lighting, heating, ventilation and other hotel facilities in the passenger compartments.


2)   London Underground Central Line – API Capacitors recently completed the supply of replacement filter capacitors on all 92TS rolling stock as part of the life extensive programme and traction systems overhaul to ensure these trains can operate for another 15-20 years.


3)   Brush Traction – API Capacitors was selected as a specialist manufacturer to re-create and retro fit capacitor designs. They designed and supplied a large number of obsolete power capacitor designs for use in two brand new battery electric locomotives built in the UK for MTR Corporation in Hong Kong based on 1980s designs.


GD Rectifiers has been an authorised distributor for API Capacitors for over a decade, providing a design consultancy service, expert technical support, fast delivery and competitive pricing. As API Capacitors’ leading UK distributor, we’re confident we can help you find the right capacitors to get your project back on track.


For further information on API Capacitors product range, or to discuss your enquiry with our team, please call us on: 01444 243 452 or email:


Share Article

Related News

GD Distributor Image
Enerdoor Three Phase EMI-RFI Filters by GD Rectifiers
CE Certification by GD Rectifiers
Meth Harmonic Detuned Reactors