The Danish EL-Federation (Danish: Dansk El Forbund, DEF) is a trade union representing electricians and technicians in Denmark.
The union was founded 1 January 1904 as the Danish Union of Electricians,[1] and affiliated to the Danish Confederation of Trade Unions (LO).
By 1997, half of its members worked in construction, 30% in the metal industry, and most of the remainder in utilities and public administration.
[2] By 2018, the union had 22,808 members.
[3] Since 2019, it has been affiliated to the Danish Trade Union Confederation, the successor of the LO.