NBN EN 61797-1 : 1999

1 Scope and object
2 Normative references
3 Laminations
4 Coil former designation
    4.1 Standard version (without terminal pins)
    4.2 Printed wiring board mounting version
          (with terminal pins)
5 Dimensions
    5.1 General
    5.2 Dimensions corresponding to the core stack height
6 Dimensions of coil formers for bracket mounting
    6.1 Coil formers, standard version
          6.1.1 Coil formers for YEI 1-types
          6.1.2 Coil formers for YEx 2-types
          6.1.3 Coil formers for YUI 1-types
          6.1.4 Coil formers for YM 1-types
    6.2 Coil formers, standard version with air duct
          6.2.1 Coil formers for YEI 1-types
          6.2.2 Coil formers for YUI 1-types
7 Dimensions of coil formers for printed wiring board
    mounting and grid plans
    7.1 Level mounting style
          7.1.1 Coil formers for YEI 1-types
          7.1.2 Coil formers for YEx 2-types
          7.1.3 Coil formers for YUI 1-types
          7.1.4 Coil formers for YM 1-types
    7.2 Vertical mounting style
          7.2.1 Coil formers for YEx 2-types
8 Material of coil formers
9 Solderability and mechanical strength of terminal pins
Annex ZA (normative) Normative references to international
publications with their corresponding European publications

Defines the main dimensions of coil formers for transformers and inductors by means of a square stack of laminations inserted in the coil formers. The main dimensions are those which allow interchangeability respecting conformance with core sizes and outline dimensions of the completed components.