The Siemens SENTRON 3VA2040-6KQ32-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 40 A continuous current at 800 V insulation voltage, designed for line protection in industrial distribution panels. Its 187 kA breaking capacity at 415 V means it can safely interrupt a fault current up to that level without the arc flashing over to adjacent gear — critical when you're feeding a motor control center or a sub-distribution board where the available fault current is high.
Breaking capacity across voltages
This MCCB's interrupting rating varies with line voltage: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3 kA at 690 V. The steep drop at 690 V tells you this is a 400 V-class breaker — don't spec it into a 690 V system expecting full fault clearing. The 242 kA at 240 V covers most North American 277/480 V panelboard mains where the line-to-ground fault can be extreme.
Built-in monitoring and communication
This breaker carries a communication function and a ground-fault monitoring version using summation current formation on the L-conductor. That means it can report trip events and leakage current over a bus to a PLC or energy management system — useful for a plant engineer trying to isolate a recurring fault without walking every panel. The other measurement function listed suggests it can also track energy or power quality data through the same comms link.
Panel fit and thermal limits
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard MCCB footprint that fits existing SENTRON switchboard and panelboard cutouts. The 2.2 W maximum power loss at rated current means minimal heat buildup inside a sealed enclosure; you can group breakers tightly without derating for ambient temperature rise. Operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C.