FLNR125ID provides a 125A rating in the FLNR_ID Series while supporting 250V AC / 125V DC circuits. The device couples indicating Class RK5 fuse construction with a 200kA AC AC interrupting rating. Visual blown-fuse indication is part of the series design. Use the Littelfuse datasheet to verify final circuit suitability.
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In the Littelfuse FLNR_ID Series, FLNR125ID provides 125A overcurrent protection at 250V AC / 125V DC. The fuse combines Class R construction, ferrule / blade (amp-dependent) termination and a 200kA AC primary interrupting specification. Published dimensions for this rating/configuration are 181.0mm length; 39.0mm max body diameter. The indicator window provides visual blown-fuse status to support faster troubleshooting. The listed application set includes Service Entrance, Transformer, Switchboard Mains, Motor Branch Circuits, general-purpose circuits; final coordination should follow UL 248-12 and Littelfuse documentation.
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