It belongs to the TeSys range and is classified under the 18402-WORLD SERVICE PARTS (CONTROL ACCESS) category, meaning it was originally cataloged as a service spare for control circuits. The aM curve (accompanying motor protection) means this fuse is designed to handle motor inrush currents without nuisance blowing, while still clearing short-circuit faults. The 63 A rating at 690 V AC gives it a solid interrupting capacity for motor branch circuits in industrial panels.
The NH0 blade size is a standard DIN form factor that fits NH0 fuse holders and switch-disconnectors. Because this is a set of three, it replaces all three phases in a three-pole fuse holder in one order line. No striker means it does not have the mechanical flag that trips an auxiliary contact on the fuse holder — verify your holder expects striker-less fuses.