Elcomac Tradelink Pvt. Ltd. Offers Fuse for Telephone Exchanges. Elcomac Tradelink Pvt. Ltd. Supplies fuse, fuse holders, fuse clips and storage racks. Fuse for Telephone Exchanges should carry 100% of the rated current continuously. Fuse for Telephone Exchanges is available in 100mA and 200mA. The 100 mA fuse should open at 250 mA between 5 sec and 400 sec. The 200 mA fuse should open at 450 mA between 5 sec and 400 sec. It is used for telephone exchanges.