The trip unit is thermal-magnetic, so it handles overloads (thermal) and short-circuits (magnetic) in one package, no extra module needed.
This breaker mounts on a backplate, not a DIN rail — it takes 9 module pitches (9 x 9 mm) of width at 81 mm, so plan for a drilled or tapped mounting surface. The front-front connection (both line and load terminals on the front face) keeps wiring accessible without reaching behind the panel. Terminals accept compression lugs or busbars; the connection pitch is 35 mm with spreaders, 27 mm without. Rated for pollution degree 3 (conforming to IEC 60664-1) and overvoltage category III, so it can handle the dirty power environment of an industrial panel fed from a transformer.
Electrical durability is 20,000 cycles at 440 V at half rated current, 10,000 at full rated current, and 5,000 at 690 V — so for frequent switching (like motor circuits), check your cycle count against these figures. The breaker dissipates 5.7 W per pole, so three poles at full load add about 17 W of heat to the enclosure — factor that into your thermal budget.