IEC 60115-2-ed.4.0

Annotation of standard text IEC 60115-2-ed.4.0 :

IEC 60115-2:2023 is applicable to fixed low-power film resistors with termination leads for use in electronic equipment, which are typically assembled in through-hole technology (THT) on circuit boards. These resistors are typically described according to types (different geometric shapes) and styles (different dimensions) and product technology. The resistive element of these resistors is typically protected by a conformal lacquer coating. These resistors have wire terminations and are primarily intended to be mounted on a circuit board in through-hole technique. The object of this document is to state preferred ratings and characteristics and to select from IEC 60115-1 the appropriate quality assessment procedures, tests and measuring methods and to give general performance requirements for this type of resistor. This edition includes the following significant technical changes with respect to the previous edition: the definitions of product technologies and product classification levels of the generic specification, IEC 60115-1:2020, have been adopted; the preferred dimensions given in Table 1 have been reviewed, and the legacy style RA_0922 has been removed; a basis for the optional specification of the lead eccentricity of axial leaded resistors has been amended in 4.2; the period-pulse high-voltage overload test of IEC 60115-1:2020, 8.3 has been adopted as default test method in 5.3.8, thereby replacing the legacy test periodic-pulse overload test of IEC 60115-1:2020, 8.4; the revised solderability test of IEC 60115-1:2020, 11.1 has been adopted in 5.3.19 and 5.3.20; the combined solvent resistance test of IEC 60115-1:2020, 11.3 has been adopted in 5.3.22; the endurance at room temperature test of IEC 60115-1:2020, 7.2 (prior IEC 60115 2:2014, Annex C) has been adopted as an optional test in 5.4.1; the single-pulse high-voltage overload test of IEC 60115 1:2020, 8.2, applied with the pulse shape 10/700 in 5.3.7, is complemented with the optional alternative provided by the pulse shape 1,2/50 in 5.4.2; climatic tests for operation at low temperature of IEC 60115-1:2020, 10.2, and for damp heat, steady state, accelerated of IEC 60115-1:2020, 10.5, have been adopted as optional tests in 5.4.4 and 5.4.5, respectively; new guidance is provided in 6.2 on the presentation of stability requirements with their permissible absolute and relative deviations; acceptance criteria for the visual examination have been added in 6.5 and in Annex B; visual examination for the primary and proximity packaging has been added in 6.5.2 and in 7.2; the periodical evaluation of termination platings has been added as a new topic of quality assessment in 9.8; the revised test clause numbering of IEC 60115-1:2020 has been applied; a new Annex C has been added to summarize workmanship requirements for the assembly of leaded film resistors, e.g. as given in the prior IEC 61192 series of standards; the informative Annex F (prior Annex B) on radial formed styles has been amended with details on a formed Z-bend style for surface-mount assembly. L’IEC 60115-2:2023 s’applique aux resistances fixes a couche, a faible dissipation, equipees de broches de sortie, utilisees dans les equipements electroniques, et qui sont generalement assemblees sur les cartes de circuit imprime au moyen de la technologie a trous traversants (THT). Ces resistances sont generalement decrites selon des types (differentes formes geometriques), des modeles (differentes dimensions) et des technologies de produit. L’element resistif de ces resistances est generalement protege par un revetement de vernis enrobant. Ces resistances comportent des fils de sortie et sont principalement destinees a etre montees sur une carte de circuits avec la technique des trous traversants. Le present document a pour objet d’enoncer les caracteristiques assignees et les caracteristiques preferentielles, de choisir dans l’IEC 60115-1 les procedures d’assurance de la qualite et les methodes d’essai et de mesure appropriees, et de fixer les exigences de performances generales pour ce type de resistance. Cette edition inclut les modifications techniques majeures suivantes par rapport a l’edition precedente: a) adoption des definitions des technologies de produit et des niveaux de classification de produit de la specification generique, IEC 60115-1:2020; b) examen des dimensions preferentielles du Tableau 1, et suppression de l’ancien modele RA_0922; c) amendement en 4.2 d’une base pour la specification facultative de l’excentricite des broches, pour les resistances a broches axiales; d) integration en 5.3.8, en tant que methode d’essai par defaut, de l’"essai de surcharge haute tension a impulsions periodiques" donne dans l’IEC 60115-1:2020, 8.3, entrainant le remplacement de l’ancien "essai de surcharge a impulsions periodiques" donne dans l’IEC 60115-1:2020, 8.4; e) integration en 5.3.19 et 5.3.20 de la revision de l’essai de brasabilite de l’IEC 60115-1:2020, 11.1; f) integration en 5.3.22 de l’essai de resistance au solvant combine de l’IEC 60115-1:2020, 11.3; g) integration en 5.4.1, en tant qu’essai facultatif, de "l’essai d’endurance a la temperature ambiante" donne dans l’IEC 60115-1:2020, 7.2 (figurant anciennement dans l’IEC 60115-2:2014, Annexe C); h) ajout de la forme d’ondes des impulsions 1,2/50 comme variante facultative en 5.4.2 a "l’essai de surcharge haute tension a une seule impulsion" donne dans l’IEC 60115-1:2020, 8.2, applique avec la forme d’ondes des impulsions 10/700 specifiee en 5.3.7; i) integration en tant qu’essais facultatifs des essais climatiques relatifs au "fonctionnement a basse temperature" de l’IEC 60115-1:2020, 10.2, et a "chaleur humide, essai continu, accelere" de l’IEC 60115-1:2020, 10.5, respectivement en 5.4.4 et 5.4.5; j) ajout de nouvelles recommandations en 6.2 sur la presentation des exigences de stabilite, ainsi que leurs ecarts absolus et relatifs admis; k) ajout de criteres d’acceptation pour l’examen visuel