That AC-3 rating covers the standard induction-motor starting and stopping profile — the contactor is sized for a motor drawing 12 A under load, not just the locked-rotor inrush.
The 45 mm width keeps the footprint tight in a crowded enclosure — three of these sit side by side in a standard 140 mm backplate bay. Depth is 80 mm, height 74 mm, so it clears most 100 mm gland-plate depths without a spacer.
Fire resistance tested to 850 °C per IEC 60695-2-1. Protective treatment TH (pollution degree 3) per IEC 60068-2-30 means it handles humid, mildly corrosive environments — typical for unheated control cabinets in temperate climates. IP2X finger protection on the contactor body.