Siemens 3VA1140-6EF42-0AA0 — 40 A, 4-Pole SENTRON MCCB for Line Protection
The 220 kA breaking capacity at 240 V gives it headroom for high-fault installations; at 415 V it still interrupts 154 kA, and at 690 V it holds 17 kA. That kind of SCCR means it can sit upstream of smaller breakers without coordination worries in most industrial panels.
The 40 A rating holds steady from 40 °C up to 50 °C, then derates slightly — 39 A at 55 °C and 60 °C, 38 A at 65 °C, 37 A at 70 °C. If your panel runs hot, that derating curve tells you the breaker won't nuisance-trip as long as the load stays under the adjusted figure.