Choose IDSR300 when the design calls for a Littelfuse IDSR Series fuse at 300A and 600V AC / 600V DC. The device couples Class RK5 indicating fuse construction with a 200kA AC AC interrupting rating. Visual blown-fuse indication is part of the series design. Refer to the official datasheet for final coordination.
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For 300A applications, Littelfuse IDSR300 combines the IDSR Series platform with 600V AC / 600V DC capability. 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 295.3mm length; ~66mm max body diameter. The indicating design also supports 600V DC circuits. Applications include DC circuits, Solar Inverters, Motor, Transformer, Solenoid. Confirm final suitability with the official datasheet and UL 248-12.
