Littelfuse has signed a definitive agreement for the acquisition of Concord Semiconductor, a Taiwan-based designer and manufacturer of TVS diodes and other overvoltage circuit protection products for the automotive, consumer electronics, computer, industrial and telecom markets. Concord Semiconductor has annual sales of approximately $16 million and operates facilities in Taiwan and China. Terms of the transaction were not disclosed. The acquisition is expected to be completed in the second quarter of 2006. Littelfuse has annual sales of $467.1 million in 2005.