Founded in Milan in 1953 to design and manufacture "Automatic Electrical Equipment". The first site was a 500sqm laboratory in the centre of the town. The company name reveals the attention for the technical content of the products and the vocation to the scientific research.

Contactors were the first product: at the beginning small size "micro" (20A and 30A), then larger and larger contactors up to 3000A in the standard range and a number of special executions for wide applications up to 4 kA. At the end of the '50s a new series of block contactors was released: K10 and K20, at that time absolutely at the forefront in the technology. Soon the production needed more space and Microelettrica moved to an old industrial site in the North of Milan, popularly called "Bovisa", where the manufacture of Motor Control Switches, Switchboards and Panels started. This activity successfully continued until the end of the '80s contributing to develop the know-how of the electrical equipment construction and applications. In the '60s started the production of Resistors, at the beginning mainly as a part of motor starting and control devices, then as system equipment in various applications.