Within Littelfuse’s IDSR Series, IDSR125 is specified for 125A service at 600V AC / 600V DC. Electrical protection is based on Class RK5 indicating fuse behavior and 200kA AC interrupting capability. Visual blown-fuse indication is part of the series design. Refer to the official datasheet for final coordination.
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The IDSR Series catalog number IDSR125 delivers a 125A rating and 600V AC / 600V DC operating capability. Mechanically it uses a Class R format for cartridge / clip installation; electrically it is rated to interrupt 200kA AC. Published dimensions for this rating/configuration are 244.5mm length; ~46mm 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.
