What this 40 A MCCB delivers for your panel
Its 187 kA interrupting rating at 240 V gives you headroom on high-fault utility feeds, while the 121 kA at 415 V and 440 V covers most European and Asian industrial supplies. At 500 V it still holds 75.6 kA, and at 690 V the rating drops to 3.7 kA — that last figure is the one to watch if you're feeding a 690 V motor drive.
For a site electrical engineer working on coordination studies: the 3VA2140-5KQ46-0AA0 delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V.
Four poles in a single compact housing; the width is the key dimension for multi-breaker row spacing in a distribution board.
Ground-fault and communication capability
This MCCB includes a ground-fault monitoring function using summation current formation on the L+N conductor — it detects leakage by comparing phase and neutral currents, not by a separate toroid. Communication function is present, so it can integrate with a building management or power monitoring system. The trip indicator is not fitted on this variant; fault status must be read via the communication interface or a visual inspection of the handle position.