微型熔断器 第4部分：通用模块化熔断器（UMF）- 通孔和表面贴装类型

[中文适用范围]： IEC 60127-4:2026 标准包含其官方版本及修订对照版。修订对照版仅提供英文版本，便于快速、便捷地对比现行 IEC 标准与其上一版之间的所有变更。 该标准适用于印刷电路板及其他基板系统中使用的通用模块化熔断器（UMF），用于保护电器、电子设备及其部件，通常设计用于室内环境。标准不适用于在特殊条件下使用的电器所配用的熔断器，例如腐蚀性或爆炸性环境中的应用。此类熔断器通常仅应由具备相应专业技能的人员使用专用工具进行安装或更换。 本文件除满足 IEC 60127-1 的要求外，还附加了关于“不可互换性”的特定要求。IEC 60127 各部分的目标与 IEC 60127-1 所述一致，并在此基础上增加不可互换性的要求。 本第四版取代了 2005 年发布的第三版以及 2008 年和 2012 年的修订稿 1 和修订稿 2，属于技术修订版。与前一版相比，本版本包含以下重要技术变更： a) 与 IEC 60127-1:2023（第三版）保持一致； b) 将 UMF 的额定电流提升至 100A，并提供相应的最大电压降及最大持续耗散功率； c) 修改相关图示； d) 更新规范性引用文件至最新版本。 本国际标准应配合 IEC 60127-1:2023 一并使用。 [外文原描述]： IEC 60127-4:2026 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC 60127-4:2026 relates to universal modular fuse-links (UMF) for printed circuits and other substrate systems, used for the protection of electric appliances, electronic equipment, and component parts thereof, normally intended to be used indoors. It does not apply to fuse-links for appliances intended to be used under special conditions, such as in a corrosive or explosive atmosphere. These fuses are normally intended to be mounted or replaced only by appropriately skilled persons using specialized equipment. This document applies in addition to the requirements of IEC 60127-1. The objectives of this part of IEC 60127 are as given in IEC 60127-1, with the additional requirement of a degree of non-interchangeability. This fourth edition cancels and replaces the third edition published in 2005, Amendment 1:2008 and Amendment 2:2012. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) align to IEC 60127-1:2023, third edition; b) enhance the rated current of UMFs to 100A and provide the corresponding maximum voltage drop and maximum sustained dissipation; c) modify the figures; d) update the normative references to the latest version. This International Standard is to be used in conjunction with IEC 60127-1:2023