What this 3VA2140-7KP32-0AA0 is and where it fits
This is a Siemens SENTRON 3VA2140-7KP32-0AA0 molded case circuit breaker — a 3-pole, 40 A continuous-rated MCCB with an ETU850 electronic trip unit, designed for line protection in distribution panels. The 480 A frame size means it shares the same physical footprint as higher-current siblings, so if you're swapping into an existing panel layout, the 181 mm height, 105 mm width, and 86 mm depth are the dimensions to check against your bus and enclosure space. Rated insulation voltage is 800 V, and the interrupting capacity runs from 330 kA at 240 V down to 3.7 kA at 690 V — numbers that matter for fault-current coordination studies. The ETU850 trip unit is programmable, with communication and measurement functions onboard, so this breaker can report status and power data back to a BMS or PLC without a separate metering module.
What the ratings mean for panel fit and coordination
The 40 A continuous rating holds flat from 40 °C through 70 °C — no derating needed across typical panel ambient temperatures. That's unusual for a molded case breaker and simplifies the panel schedule if you're running near the limit. The 480 A maximum frame rating is the largest plug-in or fixed-mount frame in the 3VA2 family, so this breaker body is physically sized for bus bars and lug kits rated up to that level, even though the trip is set for 40 A. Interrupting ratings: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. The steep drop at 690 V is typical for an MCCB — the arc extinction limits the high-voltage interrupting capability. For most 400 V-class distribution, the 242 kA figure gives substantial headroom for high-fault locations like substation mains or large motor control centers.
Deployment context — where this breaker goes
This is a line-protection MCCB, so it's the main or feeder breaker in a SENTRON distribution panel, typically on a DIN-rail or mounting plate inside an enclosure. The IP40 front protection means it's suitable for indoor panel mounting where no water spray is present. The ETU850's communication function allows integration with a higher-level energy management system over the breaker's internal bus.