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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | LITTELFUSE |
| Manufacturer Product Number | KLSR400 |
| Description | Industrial Fuse; 400A; Class RK1; Fast; 295.3mm; 600 VAC / 300 VDC; UL/CSA |
| Datasheet | Download Datasheet |
The Littelfuse KLSR400 is a 400 A fast-acting UL Class RK1 fuse, rated 600 VAC / 300 VDC.
Class RK1 is the most current-limiting Class R branch-circuit fuse: it fits the same rejection-type Class R holders as an RK5 but lets through less fault energy. A fast-acting fuse opens quickly on an overload, for resistive and lightly loaded circuits with little switch-on surge.
Interrupting rating: 200 kA @ 600 VAC; 20 kA @ 300 VDC (Littelfuse self-certified).
Construction: 295.3 mm overall length; knife blade with rejection notch.
It is UL Listed and CSA certified (UL file E81895). Standards: UL 248-12.
| Category | |
| Manufacturer | LITTELFUSE |
| Model | KLSR |