Thermal derating and real-world current
This breaker holds its full 16 A rating from 40 °C up through 55 °C ambient. At 60 °C it derates to 15 A, and it holds that 15 A through 70 °C. For a panel that runs warm — say, a packed enclosure near a hot process line — you don't lose headroom until you're past 55 °C. That's a practical advantage over breakers that start derating at 40 °C. Maximum power loss is 10.6 W, which is modest for a 16 A MCCB with this interrupting capacity. In a dense panel, that's one less heat source to worry about in your thermal calc.
Physical fit and panel integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep. That 70 mm depth is the dimension to watch when you're sizing a shallow enclosure or a gland plate clearance — it's the dimension that reaches back into the panel. The 76.2 mm width (3 inches) is standard for a 3-pole MCCB footprint, so it'll land in the same DIN-rail or mounting-plate slot as other SENTRON 3VA frames. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. That covers unheated warehouses and outdoor enclosures in most climates short of arctic conditions.