No undervoltage release or communication function is built in, so it's a straight electromechanical protector with no auxiliary electronics to fail. Breaking capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
Panel fit and thermal derating
The 4-pole width at roughly 100 mm is standard for a 4-pole MCCB in a DIN-rail or backplate layout — plan for that footprint when laying out gland plates and busbar runs. Rated 20 A continuously at 40 °C, and holds that rating through 55 °C. At 60 °C it derates to 19 A, and stays at 19 A through 70 °C. That gives a solid thermal margin in a warm enclosure; you don't lose headroom until the ambient exceeds 55 °C. Front IP40 protection means it's sealed against tools and small wires but not against water spray — keep it inside the panel, not on a washdown-zone door.
Insulation voltage rated at 800 V, power loss 12 W max. These are standard industrial specs — no special handling or climate-controlled storage needed.