It's built for DC distribution panels where you need reliable overload and short-circuit protection on a 750 V DC bus. Breaking capacity is 100 kA Icu at 500 V DC (2 poles in series) per IEC 60947-2. The TM-DC trip unit gives you LI protection: thermal for overload (L) and magnetic for short-circuit (I). No earth-leakage built in — you'd add a Vigi module separately if that's needed. It's rated Category A (no intentional short-time delay), so it trips fast on a hard fault.
Mounts on a backplate — fixed, not plug-in. Front connections both top and bottom, with a 45 mm pole pitch. At 255 mm high, 185 mm wide, and 110 mm deep, it'll fit most standard enclosures, but watch the gland plate clearance — the front terminals need room for cable bending radius.