BS EN 60384-8:2015 pdf download – Fixed capacitors for use in electronic equipment Part 8: Sectional specification: Fixed capacitors of ceramic dielectric, Class 1
The following information shall be given in each detail specification and the values quoted shall preferably be selected from those given in the appropriate clause of this sectional specification. 1 .
4.2 Outline drawing and dimensions There shall be an illustration of the capacitor as an aid to easy recognition and for comparison of the capacitor with others. Dimensions and their associated tolerances, which affect interchangeability and mounting, shall be given in the detail specification. All dimensions shall preferably be stated in millimetres, however when the original dimensions are given in inches, the converted metric dimensions in millimetres shall be added. Normally, the numerical values shall be given for the length of the body, the width and height of the body and the wire spacing, or for cylindrical types, the body diameter, and the length and diameter of the terminations. When necessary, for example when a number of items (capacitance values/voltage ranges) are covered by a detail specification, the dimensions and their associated tolerances shall be placed in a table below the drawing. When the configuration is other than described above, the detail specification shall state such dimensional information as will adequately describe the capacitors. When the capacitor is not designed for use on printed boards, this shall be clearly stated in the detail specification. 1 .
4.3 Mounting The detail specification shall specify the method of mounting to be applied for normal use and for the application of the vibration and the bump or shock tests. The design of the capacitor may be such that special mounting fixtures are required in its use. In this case, the detail specification shall describe the mounting fixtures and they shall be used in the application of the vibration and the bump or shock tests. 1 .
4.4 Ratings and characteristics 1 .
4.4.1 General The ratings and characteristics shall be in accordance with the relevant clauses of this standard, together with the following: 1 .
4.4.2 Nominal capacitance range See . When products approved to the detail specification have different ranges, the following statement should be added: “The range of capacitance values available in each voltage range is given in the register of approvals”. 1 .
4.4.3 Particular characteristics Additional characteristics may be listed, when they are considered necessary to specify adequately the component for design and application purposes.
4.4.4 Soldering The detail specification shall prescribe the test methods, severities and requirements applicable for the solderability and the resistance to soldering heat tests. 1 .
4.5 Marking The detail specification shall specify the content of the marking on the capacitor and on the packaging. Deviations from 1 .6 shall be specifically stated. 1 .
5 Terms and definitions For the purposes of this document, the applicable terms and definitions of IEC 60384-1 as well as the following apply. 1 .
5.1 fixed capacitors, ceramic dielectric, Class 1 capacitor specially designed and suited for resonant circuit application where low losses and high stability of capacitance are essential or where a precisely defined temperature coefficient is required, for example for compensating temperature effects in the circuit Note 1 to entry: The ceramic dielectric is defined by its nominal temperature coefficient (α). 1 .
5.2 subclass for a given nominal temperature coefficient; it is defined by the tolerance on the temperature coefficient (see Table 2) Note 1 to entry: The nominal temperature coefficient value and its tolerance refer to the temperature interval of +20 °C to +85 °C but because in practice TC curves are not strictly linear, it is necessary to define limiting capacitance deviations (∆C/C) for other temperatures (see Table 3). The same information is expressed in graphical form in Figures A.1 to A.1 5. These figures enable the user to form an estimate of the value and tolerance of 1 /C × (dC/dT) T , the incremental temperature coefficient at a given temperature T, though this quantity is not required specifically to be measured in the test.BS EN 60384-8 pdf download.