IEC 61754-4:20 22 RLV包含官方IEC国际标准及其红线版本。Redline版本仅提供英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 IEC 61754-4:20 21规定了SC型连接器系列的标准接口尺寸。本第三版取消并取代2013年出版的第二版，构成技术修订。与上一版相比，此版本包括以下重大技术变更: -增加了套圈压缩力的测试方法IEC 61300-3-22； -增加了附件A（资料性），其中包含测试安装适配器强度的切口尺寸要求。

IEC 61754-4:2022 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 61754-4:2021 specifies the standard interface dimensions for type SC family of connectors. This third edition cancels and replaces the second edition published in 2013 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the test method IEC 61300-3-22 for the compression force of the ferrule was added;
- Annex A (informative) with cut out dimension requirements for testing the strength of mounted adaptors was added.