Siemens SENTRON 3VA1140-3EF32-0AB0 — 40 A MCCB with TM240 Release
Its breaking capacity is specified across four voltage levels: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V.
Thermal-Magnetic Release and Temperature Derating
The adjustable response time tr has a maximum setting of 1 s, giving you some selectivity window downstream. Above that, it starts to derate: 38.4 A at 55 °C, 37.6 A at 60 °C, 36.8 A at 65 °C, and 36 A at 70 °C. If your panel sits near a furnace or drive cabinet running hot, factor that 10% drop at 70 °C into your load budget.
Physical Fit and Auxiliary Contacts
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a compact 3-pole footprint that fits standard Siemens SENTRON panel cutouts and busbar systems. The depth of 70 mm means it clears most gland plates and backpanel wiring without forcing a deeper enclosure. It comes with 2 auxiliary switches (HP type) pre-installed. If you need those options, you're looking at a different 3VA variant. No voltage trigger or phase-failure detection built in; it's a pure overcurrent device.