What this MCCB carries and where it fits
The 3VA2140-5MN32-0BA0: Three poles, 40 A at 40 °C through 50 °C without derating; above that the thermal curve pulls it down to 36 A at 70 °C. That matters if the breaker lives in a hot enclosure next to a drive or transformer — check your ambient before assuming full rating. Interrupting capacity runs from 187 kA at 240 V down to 17 kA at 690 V. At 415 V and 440 V it holds 121 kA — solid for most industrial distribution boards where the transformer is close. The 690 V figure (17 kA) is the one to watch if you are on a 690 V mining or marine supply.
Trip unit and protection logic
The ETU350M electronic release handles overload, short-circuit, and ground-fault (though this variant ships without ground-fault monitoring — the release is capable, but the module is omitted here). Phase failure detection is built in, which is the main reason you pick this over a thermal-magnetic MCCB on a motor feeder: it catches a lost phase before the motor single-phases to failure. An undervoltage release (UVR) is integrated — part number 3VA9608-0BB11 for the auxiliary trip coil. That means the breaker drops on loss of control voltage, which is standard for emergency-stop circuits or undervoltage protection schemes. No auxiliary contacts on this variant, so if you need status feedback to a PLC, you add them externally.
Panel fit and environmental limits
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. That is the standard 3VA2 footprint — it drops into the same cutout as other 3VA2 three-pole frames. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. The 75 W maximum power loss means the breaker dissipates heat into the enclosure; factor that into your thermal calculation if the panel is densely packed.