SENTRON 3VA1140-3EF32-0JC0 — 40 A MCCB with TM240 Release
Interrupting capacity is 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. At 415 V, that 52.5 kA SCCR covers most industrial service-entrance and sub-feed applications without cascading upstream — the breaker clears a bolted fault before the upstream device sees it, provided the let-through energy is coordinated. Thermal derating is flat to 50 °C (40 A), then drops to 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. In a sealed, non-ventilated enclosure the 55 °C threshold is the one to watch — a 40 A breaker in a 55 °C ambient is effectively a 38 A device.
Integration — Panel Fit and Auxiliaries
Footprint is 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB envelope that fits most DIN-rail or panel-mount backplates without re-drilling. The integrated auxiliary trip module is order code 3VA9688-0BL32, which is the factory-matched accessory for this frame.
Operating Range and Endurance
Mechanical endurance is 15,000 latching operations — adequate for a distribution breaker that sees infrequent switching; not rated for daily motor-start duty.