Lambda UK Lambda UK is a unit of the TDK Corporation, a leading global electronics company. Established in 1959, Lambda UK now claims to be Britain's largest manufacturer of standard and configurable power supplies. Ilfracombe, in the South West of England, is the European head office and manufacturing centre. Lamda UK offers a broad range of AC-DC and DC-DC products, with ratings up to 50kW, to suit virtually all applications.