The 3VA1140-6EF36-0CA0: At 500 V the Icu drops to 17 kA, so verify the system voltage against the fault current before committing the BOM line.
Thermal derating and temperature limits
If the breaker sits next to a heat source or in a sealed cabinet, use the 70 °C figure (37 A) as the continuous current ceiling for the circuit. Account for it in the enclosure thermal calculation, especially if the panel is NEMA 12 or IP54 with limited convection.
Physical fit and what the undervoltage release does
It uses clamp (screw) connections for the line and load terminals, not lug or busbar stabs. The width is 3 inches exactly, which matters for DIN-rail or mounting-plate layouts where you're fitting multiple poles side by side. The UVR is wired separately from the main power path; it draws a small holding current when energized.
The base switch part number is 3VA11406EF360AA0 — the -0CA0 suffix adds the undervoltage release and clamp terminals. If your BOM calls for the base breaker without the UVR, the base switch is the same frame and trip unit; the UVR is a factory-installed option, not a field-addable accessory on this order code.