The Siemens SENTRON 3VA1140-3EF32-0CA0 is a 3-pole molded case circuit breaker rated for a continuous current of 40 A at ambient temperatures up to 50 °C, with a thermal-magnetic TM240 overcurrent release and an integrated undervoltage release (UVR). The interrupting ratings are substantial: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V.
Above that, it derates linearly: 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 unit has no auxiliary contacts, no communication function, no phase-failure detection, and no ground-fault monitoring. If you need those, you'll add external modules or choose a different variant.
Mechanical and dimensional fit
The depth of 70 mm means it will clear most shallow enclosures, but verify the gland plate clearance if the breaker is mounted near the back wall. That's typical for a line-protection MCCB — it's not a contactor meant for frequent switching, but it handles routine on-off cycles for maintenance or isolation without wearing out prematurely.