The 3VA1140-6EF32-0CH0 is a SENTRON molded case circuit breaker (MCCB) sized for line protection — three poles, 40 A continuous at 40 °C, with a short-circuit breaking capacity of 220 kA at 240 V. The thermal derating curve is already baked into the evidence: it holds 40 A all the way to 50 °C, drops to 39 A at 55 °C, and stays at 38 A through 65 °C, then 37 A at 70 °C — so in a hot panel near a drive cabinet or a motor starter lineup, you still get nearly full rating. The 70 mm depth and 76.2 mm width (2.76 in × 3 in) put it in the standard MCCB footprint for a 3-pole frame, so it swaps into existing Sentron or competitive cutouts without reworking the gland plate.
Breaking capacity across voltages — selectivity planning
This breaker's interrupting rating drops as the voltage climbs: 154 kA at 415 V, 121 kA at 440 V, and 17 kA at both 500 V and 690 V. That 17 kA at 690 V is the number to watch if you're feeding a 690 V drive bus or a mining conveyor — it's still a strong figure for a 40 A frame, but it means the upstream device (transformer breaker or main) needs to be coordinated so the fault current at the 3VA1140's terminals stays under 17 kA.
Built-in undervoltage release and auxiliary switch complement
The supplied basic switch is order code 3VA11406EF320AA0, so if you ever need to replace just the switching mechanism, that's the service part.