FLSR040 provides a 40A rating in the FLSR Series while supporting 600V AC / 300V DC circuits. The construction uses dual-element Class RK5 fuse characteristics and a 200kA AC primary interrupting rating. Confirm application details against the manufacturer datasheet.
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In the Littelfuse FLSR Series, FLSR040 provides 40A overcurrent protection at 600V AC / 300V DC. The physical format is Class R; mounting is cartridge / clip, with ferrule / blade (amp-dependent) termination and 200kA AC rated interruption. Published dimensions for this rating/configuration are 139.7mm length; 27.0mm max body diameter. Its dual-element time-delay behavior is intended to ride through normal motor inrush while protecting against overloads and short circuits. Typical uses cover Motor, Transformer, Service Entrance, Feeder Circuits, general-purpose circuits. Check UL 248-12 and the manufacturer datasheet before final selection.
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