IEC 60368-3:2010 pdf free download

IEC 60368-3:2010 pdf free download Piezoelectric filters of assessed quality – Part 3: Standard outlines and lead connections
This part of lEC 60368 specifies the outline drawing for piezoelectric filters with lead enclosures.
2Guidance for the standardization of outline drawings for frequency control and selection devices
In order to achieve a uniform presentation of all outline drawings for frequency control andselection devices the following guide shall be considered:
2.1 An outline drawing shall show all dimensional and geometrical characteristics of anenclosure necessary to ensure mechanical interchangeability with all other enclosures of thesame outline.Enlarged detailed view may be used, if necessary.
2.2The outline drawing shall consist of three parts:
2.2.1 A drawing with dimensional symbols (capital letter) as shown in Figure 1 below withapplicable notes, if necessary.
2.2.2 A tabular listing relating to the drawing symbols to the actual dimensions. Where possiblethis shall be shown on the same page as the drawing.
2.2.3 An “actual-size” sketch (scale 1:1).
2.3 The outline drawing shall be executed in the third angle projection.
2.4The function and identification of the lead connections (termination) shall be determined byagreement between the supplier and user.They shall not be defined on the outline drawing.
2.5 Descriptive notes may be used at the bottom of/ or adjacent to, the drawing with properreference to the body of the drawing.
2.6All dimensions shall be in millimeters.
2.7outline dimensions A,B.C,D and E shall be listed with maximum values only.
2.8 Lead (termination) cross-sectional dimensions shall be listed with minimum and maximumvalues. lf applicable, nominal dimensions may be added.
2.9 The spacing of the leads (termination) -symbol H-shall be listed with minimum，nominaland maximum dimensions.
2.10 Leads (terminations) for soldering application shall be specified with the minimum lengthdimensions (symbol L) only.
Lead (termination) for plug-in application shall be specified with minimum and maximum lengthdimensions.
3 Dimensions of piezoelectric filter enclosures
The dimensions in this standard apply to the competed piezoelectric filters;
Only those dimensions which meet the requirements of the guidance for standardization of outline drawings are given ?see Clause 2?;
4 Designation of piezoelectric filter enclosures