UL 248-9:2020 PDF Download

The UL 248-9:2020 standard specifically pertains to Class K fuses. These fuses have a maximum rating of 600 A and can be used for voltage levels of either 250 V or 600 V AC. It should be noted that DC ratings for these fuses are optional and not mandatory according to this standard.

The purpose of this standard is to provide requirements and guidelines for the design, construction, and testing of Class K fuses. These fuses are commonly used in low-voltage electrical systems to protect against excessive current flow and prevent damage to electrical equipment and wiring. Compliance with the standard ensures that Class K fuses meet the necessary safety and performance requirements.