IEC 60384-14-2005 pdf – Fixed capacitors for use in electronic equipment – Part 14: Sectional specification: Fixed capacitors for electromagnetic interference suppression and connection to the supply mains.
1 General 1.1 Scope This part of IEC 60384 applies to capacitors and resistor-capacitor combinations which will be connected to an a.c. mains or other supply with nominal voltage not exceeding 1 000 V a.c. (r.m.s.) or 1 000 V d.c. and with a nominal frequency not exceeding 100 Hz. 1.2 Object The principal object of this standard 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 shall be of equal or higher performance level, lower performance levels not being permitted. A further object of this standard is to provide a schedule of safety tests to be used by national testing stations in countries where approval by such stations is required. 1.3 Normative references The following referenced documents are indispensable for the application 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 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements IEC 60063, Preferred number series for resistors and capacitors IEC 60068-1, Environmental testing – Part 1: General and guidance IEC 60068-2-17, Environmental testing – Part 2: Tests – Test Q: Sealing IEC 60335-1, Household and similar electrical appliances – Safety – Part 1: General requirements IEC 60384-1, Fixed capacitors for use in electronic equipment – Part 1: Generic specification IEC 60384-14-4, Fixed capacitors for use in electronic equipment – Part 14: Blank detail specification: Fixed capacitors for electromagnetic interference supply and connection to the supply mains – Assessment level D
1.4.3 Ratings and characteristics The ratings and characteristics shall be in accordance with the relevant clauses of this specification, together with the following. 126.96.36.199 Rated capacitance range See 2.2.1. NOTE When products approved to the detail specification have different ranges, the following statement should be added: “The range of values available in each voltage range is given in IEC QC 001005.” 188.8.131.52 Rated resistance range (if applicable) See 2.2.4. 184.108.40.206 Particular characteristics Additional characteristics may be listed, when they are considered necessary to specify the component adequately for design and application purposes. 1.4.4 Marking The detail specification shall specify the content of the marking on the capacitor and on the package. See also 1.6 of this specification. 1.5 Terms and definitions For the purposes of this document, the terms and definitions of IEC 60384-1, as well as the following, apply. NOTE Some definitions of IEC 60384-1 have been expanded, and this is indicated by reference to this note. 1.5.1 a.c. capacitor capacitor designed essentially for application with a power-frequency alternating voltage NOTE AC capacitors may be used on d.c. supplies having the same voltage as the a.c. r.m.s. rated voltage of the capacitor. 1.5.2 electromagnetic interference suppression capacitor (radio interference suppression capacitor) capacitor used for the reduction of electromagnetic interference caused by electrical or electronic apparatus, or other sources 1.5.3 capacitor or RC unit of Class X capacitor or RC unit of a type suitable for use in situations where failure of the capacitor or RC unit would not lead to danger of electrical shock but could result in a risk of fire Class X capacitors are divided into three subclasses (see Table 1) according to the peak voltage of the impulses superimposed on the mains voltage to which they may be subjected in service.
1.5.10 rated voltage either the r.m.s. operating voltage of rated frequency, or the d.c. operating voltage, which may be applied continuously to the terminations of a capacitor at any temperature between the lower and the upper category temperatures. This implies, for capacitors covered by this specification, that the category voltage is the same as the rated voltage 1.5.11 rated power (of a series RC unit) maximum power which can be dissipated by the RC unit at the rated temperature during continuous operation 1.5.12 upper category temperature maximum surface temperature for which the capacitor has been designed to operate continuously (see note to 1.5) NOTE 1 For lead-through capacitors and series RC units, the external surface temperature can be affected by internal heating due to the lead-through current. The terminations of a capacitor are considered to be part of the external surface. NOTE 2 This definition replaces that given in IEC 60384-1, 2.2.14, because suppression capacitors in accordance with this specification are intended to be connected to the mains network and may have internal heat generation as a result. 1.5.13 lower category temperature minimum surface temperature for which the capacitor has been designed to operate continuously (see note to 1.5) NOTE This definition replaces that given in IEC 60384-1, 2.2.13 (see note 2 to 1.5.12 above).