IEC 60384-22:2019 pdf download

IEC 60384-22:2019 pdf download.Fixed capacitors for use in electronic equipment – Part 22: Sectional specification
1 Scope
This part of IEC 60384 is applicable to fixed unencapsulated surface mount multilayer capacitors of ceramic dielectric, Class 2, for use in electronic equipment. These capacitors have metallized connecting pads or soldering strips and are intended to be mounted on printed boards, or directly onto substrates for hybrid circuits. Capacitors for electromagnetic interference suppression are not included, but are covered by IEC 60384-1 4. The object of this document is to prescribe preferred ratings and characteristics and to select from IEC 60384-1 the appropriate quality assessment procedures, tests and measuring methods and to give general performance requirements for this type of capacitor. Test severities and requirements prescribed in detail specifications referring to this sectional specification are of equal or higher performance levels; lower performance levels are not permitted.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60063, Preferred number series for resistors and capacitors IEC 60068-1 :201 3, Environmental testing – Part 1: General and guidance IEC 60068-2-58:201 5, Environmental testing – Part 2-58: Tests – Test Td – Test methods for solderability, resistance to dissolution of metallization and to soldering heat of surface mounting devices (SMD) IEC 60068-2-58:201 5/AMD1 :201 7 IEC 60384-1 :201 6, Fixed capacitors for use in electronic equipment – Part 1: Generic specification IEC 61 1 93-2:2007, Quality assessment system – Part 2: Selection and use of sampling plans for inspection of electronic components and packages ISO 3:1 973, Preferred numbers – Series of preferred numbers
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60384-1 and the following apply.3.1 surface mount multilayer capacitor multilayer capacitor whose small dimensions and nature or shape of terminations make it suitable for surface mounting in hybrid circuits and on printed boards 3.2 capacitor of ceramic dielectric, Class 2 capacitor that has a dielectric with a high permittivity and is suitable for by-pass and coupling applications or for frequency-discriminating circuits where low losses and high stability of capacitance are not of major importance Note 1 to entry: The ceramic dielectric is characterized by a non linear change of capacitance over the category temperature range (see Table 3). 3.3 subclass maximum percentage change of capacitance within the category temperature range with respect to the capacitance at 20 °C Note 1 to entry: The subclass may be expressed in code form (see Table 3). 3.4 category temperature range ambient temperature range for which the capacitor has been designed to operate continuously Note 1 to entry: This is given by the lower and upper category temperature. 3.5 rated temperature T R maximum ambient temperature at which the rated voltage may be continuously applied 3.6 rated voltage U R maximum DC voltage that may be applied continuously to a capacitor at any temperature between the lower category temperature and the rated temperature Note 1 to entry: The maximum DC voltage is the sum of the DC voltage and peak AC voltage or peak pulse voltage applied to the capacitor. 3.7 category voltage U C maximum voltage that can be applied continuously to a capacitor at its upper category temperature
4 Information to be given in a detail specification
4.1 General The detail specifications shall be derived from the relevant blank detail specification.Detail specifications shall not specify requirements inferior to those of the generic, sectional or blank detail specification. When more severe requirements are included, they shall be listed in 1 .9 of the detail specification and indicated in the test schedules, for example by an asterisk. The information given in 4.2 may be presented in tabular form if more convenient. The information in 4.2 to 4.5 shall be given in each detail specification and the values quoted should be selected from those given in the appropriate clause of this sectional specification.