As a gG (general-purpose) fuse, the DF2FN40 provides overload and short-circuit protection for cables and motor circuits. The 40 A rating defines the continuous current it carries without opening; the 690 VAC rating covers line-to-line voltage in three-phase systems up to that level. The NFC designation indicates compliance with French NFC standard dimensions and performance, common in IEC-based panel designs. The 22 x 58 mm body fits standard TeSys fuse-holders and disconnectors.
Applications
These cartridge fuses are used in motor switch-disconnectors and distribution panels for branch-circuit protection of motors, transformers, and resistive loads in industrial and commercial installations.