IEC 60947-5-4:20 02+A1:2019适用于所考虑的使用区域中使用的可分离触点，例如控制电路的开关元件。本标准考虑了两个额定电压区域: a)高于(并包括)10V(通常为24V)，其中触点用于切换具有可能电侵蚀的负载，例如可编程控制器输入； b)低于10V(通常为5V)，电侵蚀可忽略不计，例如电子电路。 第二版取消并取代了1996年作为技术报告发布的第一版。它现在具有国际标准的地位。该合并版本由第二版（2002年）及其修正案1（2019年）组成。因此，除本出版物外，无需下令修订。

IEC 60947-5-4:2002+A1:2019 applies to separable contacts used in the utilization area considered, such as switching elements for control circuits. This standard takes into consideration two rated voltage areas:
a) above (and including) 10 V (typically 24 V) where contacts are used for switching loads with possible electrical erosion, such as programmable controller inputs;
b) below 10 V (typically 5 V) with negligible electrical erosion, such as electronic circuits.
This second edition cancels and replaces the first edition which was issued as a technical report in 1996. It now has the status of an International Standard. This consolidated version consists of the second edition (2002) and its amendment 1 (2019). Therefore, no need to order amendment in addition to this publication.