LONDON (Dow Jones)--Electrocomponents PLC (ECM.LN), a distributor of electronics and maintenance products, said Friday it has appointed Peter Johnson Chairman, following the retirement of Helmut Mamsch at the recent AGM. MAIN FACTS: -Johnson will become Chairman on Oct. 1 and, in the meantime, Rupert Soames will continue to serve as Acting Chairman. -Johnson is Chairman of DS Smith PLC (SMDS.LN), a international producer of paper and packaging materials and distributor of office products. -Shares at 0907 GMT unchanged at 225.4 pence. By Iain Packham, Dow Jones Newswires; 44-20-7842-9269; [email protected] (END) Dow Jones Newswires July 30, 2010 05:09 ET (09:09 GMT)