That 40 A holds across ambient temperatures up to 50 °C without derating; at 55 °C it still carries 39 A, and at 70 °C it's 37 A — so in a warm panel you lose less than 10 % of the rating. The interrupting capacity hits 75.6 kA at 240 V, 52.5 kA at 415 V, and 32 kA at 440 V, which covers most industrial service-entrance and feeder applications on 480 V systems. At 690 V it still breaks 11.9 kA, enough for some European motor circuits.
Panel fit and power loss
The 3VA1140-3GF46-0AA0 measures 101.6 mm wide by 130 mm tall by 70 mm deep — a 4-pole MCCB that fits standard distribution panelboards and switchgear cubicles. Maximum power loss is 10.8 W, which matters for thermal calculations in sealed enclosures.