The Siemens SENTRON 3VA1140-4EE46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated 40 A continuous at 40 °C, with a TM220 thermal-magnetic trip unit — fixed thermal and fixed magnetic settings, no electronic adjustment. The 121 kA breaking capacity at 240 V AC means it can safely interrupt fault currents up to that level without upstream fuses or a larger frame; at 415 V it still holds 75.6 kA, and at 690 V it derates to 11.9 kA. That SCCR headroom makes it a fit for high-fault panels where downstream coordination matters — think main or branch feeder in an industrial distribution board.
Mounts on a DIN rail or directly to a backplate — the 101.6 mm width (4 in) and 70 mm depth (2.76 in) fit standard SENTRON 3VA panel cutouts. Rated insulation voltage 800 V covers 480/600 VAC systems with margin.
Current-production part — no phase-out or last-time-buy notice on record.