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API Capacitors have supplied capacitors for railway and traction systems since the 1980s. Our products are integral to electric and diesel-electric locomotives, multiple units, metro systems and tramways across the globe, and are designed to meet the demands of modern traction systems, including both GTO (Gate Turn-Off Thyristor) and IGBT (Insulated Gate Bipolar Transistor) based designs. Our range includes snubber capacitors, which protect against voltage spikes; AC harmonic

Inside every Variable Frequency Drive (VFD), capacitors perform functions that directly affect performance and reliability, and we design and manufacture capacitors for each of the roles below. The largest and most visible are the DC bus capacitors, which smooth the rectified DC voltage. Acting as both energy storage and voltage stabilisers, they give the inverter a clean DC supply to produce precise, stable AC power for the motor. On the input side, filter capacitors help th

API Capacitors have supplied capacitors for demanding marine applications since the 1980s. Our products are fitted on merchant ship propulsion systems and naval vessels operating around the world, for customers in both the private and public sectors. Our capacitors form an essential part of the main propulsion systems for HMS Queen Elizabeth and HMS Prince of Wales, the UK's latest generation of aircraft carriers. They are also fitted on the British-built Type 45 destroyers,