It carries a 32 A rating at 40 °C and a 690 V AC rated operational voltage, so it fits distribution panels where the load current sits right at 32 A and the line voltage runs up to 690 V AC. The 4-pole, 3D configuration protects three poles; the neutral pole is left unprotected.
Protection curve and what it means in the panel
The LI protection scheme gives you thermal overload (L) via an adjustable long-time pickup Ir from 0.7 to 1 x In, and magnetic short-circuit (I) with a fixed instantaneous pickup at 400 A. The long-time delay Tr is fixed but spans 120…400 s at 1.5 x In and 15 s at 6 x Ir — that thermal curve is what coordinates with downstream branch breakers. On a 32 A circuit, 400 A instantaneous means it clears a hard fault fast, but you still have thermal memory to ride through motor inrush without nuisance trips.