DIN EN 60115-8:2013-08

This part of EN 60115 is applicable to fixed surface mount resistors for use in electronic equipment. These resistors are typically described according to types (different geometric shapes) and styles (different dimensions). They have metallized terminations and are primarily intended to be mounted directly on to a circuit board. This standard specifies preferred ratings and characteristics for the type of resistor described, selects from EN 60115-1 the appropriate quality assessment procedures, tests and measuring methods, and gives general performance requirements. Test severities and requirements prescribed in detail specifications referring to this sectional specification shall be of equal or higher performance level, because lower performance levels are not permitted. The introduction of a product classification permits the user to select performance requirements according to the conditions of the intended end-use application. Three general end product levels have been established to reflect characteristic differences in functional, performance and reliability requirements and to permit the use of suitable inspection and test schedules. It should be recognized that there may be overlaps of applications between the levels. - Level G: General electronic equipment, typically operated under benign or moderate environmental conditions, where the major requirement is function. Examples for level G include consumer products and telecommunication user terminals. - Level P: High-performance electronic equipment, where one or more of the following criteria applies: - uninterrupted performance is desired or mandatory, - operation in harsh environmental conditions and - extended lifetime - Examples for level P include professional equipment, telecommunication transmission systems, - industrial control and measurement systems and most automotive applications - operated outside the passenger compartment. - Level R: High-performance and high-reliability electronic equipment - where the requirement for established reliability and for - an approved failure rate level applies in addition to the criteria of Level P. Examples for Level R include - military & defence equipment, and avionics and aerospace applications. The product classification levels shall be used in individual detail specifications, except for Level P and Level R, which may be used in combined detail specifications. The figure shows the typical shape of a derating curve that may be used to provide derating information for all cases where the maximum element temperature (MET) is equal to the upper category temperature (UCT). In Annex A the 0-ohm resistors (Jumper) are dealt with and informative annex B contains relevant letter symbols and abbreviations. The following modifications have been made with respect to DIN EN 140400:2004-09: a) introduction of a product classification based on application requirements; b) extension of the list of styles and dimensions; c) introduction of the code letters for temperature coefficient as given in EN 60062; d) introduction of description and test methods for lead-free soldering; e) introduction of a new system of test severities for the shear test; f) introduction of new test severities for the single-pulse high-voltage overload test; g) introduction of a test on the resistance to electrostatic discharge; h) amendment of the prescriptions for mounting of components; i) adoption of the IECQ rules of procedure, QC 001002-3:2005; j) separation of the test schedule into separate tables for qualification approval and for quality conformance inspection; k) consolidation of the prescription for 0-ohm resistors in a new annex; l) editorial revision. The responsible committee is GK 613 "Widerstände" ("Resistors") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.