BS 88 is a family of UK low-voltage fuse requirements, not one cartridge shape or one performance curve. Eaton Bussmann sells several links and holders associated with this market. A reliable replacement starts from the complete catalog number and its datasheet.

Identify the existing protection

Record the link's markings, terminal style and dimensions, its matching carrier or holder, and the equipment's circuit diagram. Red Spot and other holder systems are useful product-family clues, but a color or trade name does not specify a link's electrical performance.

Motor feeder example

On a motor feeder, obtain the motor nameplate current and starting profile, then check the motor starter, overload relay, contactor and cable ratings. An aM fuse is usually selected for short-circuit duty in a coordinated assembly; it is not a complete motor overload solution by itself. Compare manufacturer time-current curves and tested coordination tables rather than applying a simple multiplier to running current.

Check the precise product documentation

Body dimensions and features such as tool-free replacement or interlocked covers differ by holder series and exact part. Use Eaton's BS 88 catalog and product aid to verify a specific link and carrier combination. Never infer that a holder permits on-load fuse removal merely because its mechanism looks convenient.

For cross-references, compare full technical data and obtain approval under the equipment's maintenance procedure. Equal ampere ratings do not guarantee compatible dimensions, speed or breaking capacity.

Sources for verification

Eaton BS 88 product aid  •  Eaton low voltage catalog