1885 - Shawmut Fuse Wire Company formed in Boston, MA
1928 – Ferraz Fuse founded by Lucien Ferraz
1958 - Chase Shawmut acquired by I-T-E Imperial.
1976 - I-T-E Imperial Corp acquired by Gould inc of East Lake, OH
1980 – Gould acquires the Canadian Electric Fuse – Toronto
1982 – Ferraz acquired by Telemecanique1985 - Carbone Lorraine acquires Ferraz - France
1999 - Carbone Lorraine acquires Gould Shawmut and forms Ferraz Shawmut.
2007 - Ferraz Shawmut acquires Power Fuse group from General Electric - USA
2008 – Ferraz Shawmut acquires majority ownership of MEP/Miro - China
2008 – Ferraz Shawmut acquires R-Theta Thermal Management - Canada
2010 – Ferraz Shawmut acquires M.Schneider Sicherungs-Systeme - Austria
2010 – Carbon Lorraine changes corporate name to Mersen
2012 – Mersen acquires Eldre – USA and France
2014 – Mersen acquires a majority stake in Cirprotec - Spain