It's built for panel-mount distribution and motor branch-circuit protection where you need to limit let-through energy on a fault.
The 35 A rating with a current-limiting L-IR trip unit means this breaker clears a short-circuit fast enough to reduce the peak current the downstream gear sees — useful when you're protecting sensitive control transformers or soft-starters that can't take a full bolted-fault hit. The XT2 frame size keeps the footprint compact on a DIN-rail or panel-mount assembly, and the rotary handle gives you a positive on/off indication that stays visible through a panel door.