DIN EN 60127-4:2013-12

This part of the series of standards IEC 60127 relates to universal modular fuse-links (UMF) for printed circuits and other substrate elements, used for the protection of electric appliances, electronic equipment and component parts thereof, usually intended to be used indoors. It does not apply to fuse-links for appliances intended to be used under special conditions, such as in corrosive or explosive atmosphere. Usually it is intended to mount or replace these fuses only by appropriate skilled persons using specialized equipment. Compared with DIN EN 60127-4 (VDE 0820-4):2009-07 modifications relating the scope and principle have been introduced. In the clause solderability of terminations the subclauses relating through-hole fuse-links and surface mount fuse-links have been revised. This standard applies in addition to the requirements of IEC 60127-1. In addition to the objectives specified in IEC 60127-1 the requirement for a certain degree of non-interchangeability applies. The trend toward miniaturization of electronic equipment has caused users to require fuse-links of small dimensions, and of appropriate design for application to printed circuit boards or other substrate elements, possibly by automatic means. These fuse-links should be designed to incorporate a degree of non-interchangeability. Rated voltages of 12,5 V, 25 V, 32 V, 50 V, 63 V, 125 V and 250 V are specified together with the following characteristics: very quick acting (FF), quick acting (F), time-lag (T) and long time-lag (TT). Because of the increasing importance of limitation of transient overvoltages in new technology, recommendations are included for limits to the overvoltages produced by these fuses under specified test conditions related to typical circuit configurations. The option is given to specify the breaking capacity with alternating current or direct current, and where it is considered that fuses that meet the direct current requirement will meet the alternating current requirement; however, testing is required to validate this. Fuses may be dual rated, in which case the manufacturer's literature should be referred to. The responsible body is DKE/K 663 "Gerätesicherungen (G-Sicherungen)" of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.