What this trip unit does in the panel
It provides LI protection — thermal overload (L) via a bimetal element and fixed magnetic short-circuit (I) pickup at 190 A. The 16 A rating at 50 °C means it's sized for a 16 A continuous load in a 50 °C ambient; above that temperature the thermal curve derates per IEC 60947-2. The fixed instantaneous trip at 190 A gives a 11.9x In ratio — that's a high magnetic pickup, so it avoids nuisance trips on moderate motor inrush but still clears a hard fault fast.
The 690 V AC / 750 V DC rated operational voltage (Ue) covers most industrial distribution voltages — 400 V, 480 V, 600 V AC, and 250 V DC strings. IP40 front-face protection handles finger contact but not washdown — it's a panel-mount device, not a standalone enclosure. The adjustable long-time pickup (Ir) from 0.7 to 1.0 x In lets you fine-tune the overload threshold between 11.2 A and 16 A without swapping the trip unit. Fixed long-time delay (tr) at 120–400 s at 1.5 x Ir gives a standard inverse-time curve for cable and busbar protection — not for motor overload, which needs a separate overload relay.