Energias Primo is displayed on the building but PSP Electrical is their name.
R. Cidade Castelo Branco, Fundão
Tel: 275 773 200
email:
website: http://energiasprimo.com/
Stock a wide range of electrical components and tools. Also have some parts for plumbing, water pumps, valves etc.
Very friendly and helpful, if you don't know what it is called in Portuguese you will still be able to find it here.