SELCO A/S is a leading manufacturer of extremely reliable protection relays, generator- and engine-control products that are used in marine and power-generation applications. Littelfuse acquired SELCO, of Roskilde, Denmark, in 2011.


SELCO’s generator control and protection products and arc-flash detection systems are used for protection, control and monitoring of equipment and critical processes in marine, offshore and land-based applications. 


The SELCO products were an excellent addition to the Littelfuse electrical business and expanded our line of protection relays. With the increasing focus on safety in the industrial workplace, our protection relays are a strategic growth area for Littelfuse.