Siemens 3VA1140-4GE42-0AA0 — 40 A SENTRON MCCB, Line Protection, Active Production
Its breaking capacity reaches 121 kA at 240 V AC, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — figures that govern fault-clearing capability at the point of installation. The breaker carries a 40 A rating across ambient temperatures from 40 °C through 50 °C, then derates to 39 A at 55 °C and 60 °C, 38 A at 65 °C, and 37 A at 70 °C — useful for panels with elevated internal heat rise.
The 3VA1140-4GE42-0AA0 measures 70 mm deep, 101.6 mm wide, and 130 mm high — a footprint that fits standard Siemens 3VA panel-mounting and busbar systems.