The Schneider Electric DF2HA1311 is a DIN NH1 aM blade fuse from the TeSys GS range, rated 315 A at 500 V AC. It comes as a set of three fuses without striker, intended for motor-circuit protection against short-circuit and overload — the aM curve means it coordinates with a separate overload relay, letting the fuse handle only the fault current while the relay manages thermal protection.
Fit and form factor
The NH1 blade form factor fits standard DIN fuse holders and disconnectors in the TeSys GS family. The aM characteristic is sized for motor branch circuits: at 315 A it covers large drives, compressors, or pump feeders on 500 V AC three-phase systems. The set-of-three packaging matches a three-pole assembly — one fuse per phase, no striker means no auxiliary trip indication on the fuse itself.