Littelfuse JLLS125 125A 600V Class T Fast-Acting Fuse

For design-in and replacement checks, Littelfuse JLLS125 provides a 125A rating with 600 V AC / 300 V DC in the JLLS family. The Current-Limiting Class T Fuse format uses Fuse holder / cartridge mounting and Ferrule or blade terminals by ampere rating terminals, with 200 kA AC / 20 kA DC fault-interruption data. Package detail: Industrial Class T cartridge; 82.6 mm overall length; Class T blade body (110–200 A). Typical applications include Variable speed drives; inverters; rectifiers; UPS; power distribution units; meter stacks. Published standards/approvals reference UL 248-15, Class T. Compact fast-acting Class T construction; current-limiting performance for high short-circuit protection. Verify coordination, derating and final suitability against the current Littelfuse datasheet before design-in.