This International Standard is applicable to THERMAL-LINKS intended for incorporation in electrical appliances@ electronic equipment and component parts thereof@ normally intended for use indoors@ in order to protect them against excessive temperatures under abnormal conditions. NOTE 1 The equipment is not designed to generate heat. NOTE 2 The effectiveness of the protection against excessive temperatures logically depends upon the position and method of mounting of the THERMAL-LINK@ as well as upon the current which it is carrying. This standard may be applicable to THERMAL-LINKS for use under conditions other than indoors@ provided that the climatic and other circumstances in the immediate surroundings of such THERMAL-LINKS are comparable with those in this standard. This standard may be applicable to THERMAL-LINKS in their simplest forms (e.g. melting strips or wires)@ provided that molten materials expelled during function cannot adversely interfere with the safe use of the equipment@ especially in the case of hand-held or PORTABLE EQUIPMENT@ irrespective of its position. Annex H of this standard is applicable to THERMAL-LINK packaged assemblies where the THERMAL-LINK(S) has already been approved to this standard but packaged in a metallic or non-metallic housing and provided with terminals/wiring leads. This standard is applicable to THERMAL-LINKS with a RATED VOLTAGE not exceeding 690 V a.c. or d.c. and a RATED CURRENT not exceeding 63 A. The objectives of this standard are: a) to establish uniform requirements for THERMAL-LINKS@ b) to define methods of test@ c) to provide useful information for the application of THERMAL-LINKS in equipment. This standard is not applicable to THERMAL-LINKS used under extreme conditions such as corrosive or explosive atmospheres. This standard is not applicable to THERMAL-LINKS to be used in circuits on a.c. with a frequency lower than 45 Hz or higher than 62 Hz. 1DV DR Modification of the fifth paragraph to add the following: The maximum current is unlimited.