The new line of high-speed Class J (HSJ) fuses from Ferraz Shawmut have been engineered specifically for the operating characteristics of electronic motor
The new line of high-speed Class J (HSJ) fuses from Ferraz Shawmut have been engineered specifically for the operating characteristics of electronic motor controllers. They feature high-speed performance (low let-through energy, or I2t) and overload handling capabilities, and qualify as approved branch circuit-protection devices under National Electrical Code (NEC) requirements.
In one convenient Class J package, the UL 248-8 Listed HSJ fuse provide advanced protection for electronic motor controllers by delivering both the branch circuit protection required by the NEC and the high-speed protection necessary to protect drives’ and soft-starters’ sensitive internal electronics.