The thermal-magnetic trip (TM240) gives an adjustable overload range Ir=70…100 A and a fixed short-circuit pickup Ii=5…10×In, so you set the overload to match the cable or load and leave the magnetic for hard faults.
Where it fits and the OEM detail
The N conductor is unprotected (no integral neutral protection), and the unit includes a nut keeper kit — a detail for OEMs assembling DC Power panels in China, where the kit keeps the bus-bar hardware from backing off under vibration during transit or operation.
