What is the short circuit interrupting rating of UL Class R fuses?

The short circuit interrupting rating of UL Class R fuses is 200,000 amperes. This rating indicates the maximum amount of current that the fuse can safely interrupt during a short circuit condition without causing an explosion or creating a hazardous situation.

This capability is crucial in electrical systems, as it ensures that the fuse can handle high fault currents that may occur in the event of a short circuit. The design and materials used in Class R fuses allow them to effectively protect circuits and equipment by providing a reliable way to disconnect the electrical supply in such dangerous situations, thereby preventing potential damage or fires.

Understanding the interrupting ratings is essential for selecting the appropriate fuse for a given application, ensuring that it can adequately protect the system it is installed in. In this case, the significance of 200,000A as the short circuit interrupting rating is valuable for ensuring adequate safety and compliance with electrical codes.