The 15 kA breaking capacity per EN 60898 (20 kA per IEC 60947-2) at 240 V AC means it can safely interrupt high fault currents in a sub-distribution board or machine panel, keeping the upstream gear out of the fault path. Rated for 240 V single-phase and up to 440 V for multi-phase operation, 50/60 Hz.
Snaps onto standard 35 mm DIN rail — 1 modular width (18 mm), 76 mm deep, 90 mm tall. The IP20 rating (with conductors connected) is fine for a closed panel; no washdown rating here. Mount in any position.
The C-curve trips at 5–10× rated current — so at 2 A, it holds through a 10–20 A inrush for a few cycles. That's the right choice for a small motor starter or a control transformer primary. That extra 5 kA matters if the panel's prospective short-circuit current exceeds 15 kA — the 60947-2 rating gives you the headroom.