BUSSMANN JJS-300 Fuse

The Bussmann JJS-300 is a Class T, fast-acting, current-limiting fuse from the JJS/T-TRON family, rated for 300 A and 600 VAC, engineered to provide rapid fault clearance in power circuits and motor-drive applications while sharply limiting fault energy to protect downstream components and reduce arcing and contact wear on upstream devices. It features bolted blade-end terminations, a non-indicating design, and a compact 3.63-inch length that fits standard Bussmann holders in tight panel layouts, making installation straightforward in commercial enclosures. With an interrupt rating of 200 kAIC at 600 VAC, the JJS-300 delivers high fault-current handling while helping coordinate upstream protection in commercial power distribution and variable-frequency drive lines, supporting reliable operation under short-circuit events. CE-marked and RoHS-compliant, this fuse is commonly specified for VFD line protection, large apartment complexes, and multi-family meter stacks where fast, reliable protection and space efficiency are essential for modern electrical systems.