微型熔断器 第4部分：通用模块化熔体（UMF） 通孔和表面贴装类型

[中文适用范围]： IEC 60127-4:2026 涉及用于印刷电路及其他基板系统的通用模块化熔断器（UMF），旨在保护电气设备、电子设备及其零部件，通常设计用于室内环境。该标准不适用于在特殊条件下（如腐蚀性或爆炸性环境）使用的电器所配熔断器。此类熔断器通常仅可由具备相应专业技能并使用专用工具的人员进行安装或更换。本文件在满足 IEC 60127-1 要求的基础上另行适用。IEC 60127 本部分的目标与 IEC 60127-1 所述一致，并增加了非互换性程度的额外要求。本第四版取代了 2005 年发布的第三版、2008 年修正案 1 及 2012 年修正案 2，属于技术性修订。本版本相较于前一版本，主要技术变更包括：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，并相应规定最大电压降与最大持续功耗；c) 修改相关图示；d) 更新规范性引用文件至最新版本。本国际标准应与 IEC 60127-1:2023 联合使用。 [外文原描述]： 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