That D curve means it tolerates the inrush of motor starters, transformers, or welding equipment — magnetic trip threshold is 10–20× rated current, so nuisance trips on high-inductive loads stay off the board. Ambient range -40 to 75 °C, with humidity derating above 55 °C: 95% RH up to 55 °C, 55% up to 70 °C, 35% up to 75 °C. Vibration resistance per IEC 60068-2-6 at ±1 mm / 5–25 Hz and 50 m/s² / 25–150 Hz.
The 5SY4601-8 carries three breaking-capacity ratings under separate standards: 10 kA per EN 60898-1 (the MCB standard for household and similar installations), 35 kA per IEC 60947-2 (the industrial circuit-breaker standard), and 5 kA per UL 1077 / CSA C22.2 No.235. The D characteristic (10–20× In magnetic trip) is the right choice for motor branch circuits, welding receptacles, or any load with a high inrush-to-running ratio.
Four modular-width units (72 mm) on DIN rail. Neutral conductor is switched internally — no separate neutral bar required for the outgoing circuit. Sealable to prevent tamper. Halogen-free and silicon-free construction, suitable for clean-room or food-beverage panel environments where outgassing must be controlled. Suitability flagged for mechanical engineering and industry.