The overload protection is adjustable Ir=112A…160A, so you set the continuous current to match the load, not the breaker frame. Short-circuit protection is fixed at Ii=10 x In (1600A), a standard instantaneous pickup for motor and feeder circuits.
The 36kA Icu at 415V is the ultimate breaking capacity — the breaker can clear one fault at that level and still be serviceable. The 4-pole configuration with 100% N conductor protection means the neutral is switched and protected at the same rating as the phases, required for 4-wire systems where neutral current can approach phase current (e.g., harmonic-rich loads or mixed single-phase/three-phase panels).
Deployment context
The nut keeper kit for DC Power OEM in China indicates it was ordered with a specific accessory for DC-side applications — verify the kit is included if the BOM calls for it.