Overview: Typically used for for power distribution applications and to protect large electrical devices such as motors and drives. Available in seven sizes with a current range of 2 to 1600 A. Fuses have knife blades at both ends, which mount into fuse bases. Bases available in 1-Pole or 3-Pole designs, panel or DIN-rail mount. aM - Motor Protection operating class is fast acting for short circuit protection but slow acting for overload protection.