The 3VA1140-4EF32-0AF0: This MCCB delivers 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. For a 40 A frame, 121 kA at 240 V is a high-interrupting-capacity variant, meaning it can sit downstream of a transformer or large bus without needing a current-limiting fuse upstream. At 690 V the 11.9 kA rating is still adequate for most industrial motor circuits, but verify against the available fault current at the point of installation.
The breaker holds its full 40 A rating from 40 °C through 50 °C ambient. Above that, derating applies: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. The operating temperature range is -25 °C to +70 °C, with storage from -40 °C to +80 °C.
Dimensions: 130 mm height, 76.2 mm width, 70 mm depth. The 76.2 mm width is a standard 3-pole MCCB footprint — three modules at 25.4 mm each — so it fits existing SENTRON 3VA panel cutouts and busbar systems. Front IP40 protection (tools and wires won't reach live parts from the front).