Rated current and breaking capacity — what the numbers mean for your panel
The Siemens 3VA2225-7KP32-0AA0 is a SENTRON 3VA2 molded case circuit breaker rated for a continuous current of 250 A at 40 °C through 50 °C, with no derating needed across that range — useful when the ambient inside a packed panel pushes past 40 °C. Above 55 °C the curve steps down: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. That 250 A frame holds the full rating up to 50 °C, so you don't have to oversize the breaker for a warm enclosure. Breaking capacity is the real selector here. At 240 V it clears 330 kA — that's the high-end short-circuit rating you'd expect in a main or large feeder position. At 415 V and 440 V it's still 242 kA, at 500 V it drops to 187 kA, and at 690 V it's 4.5 kA. The 690 V figure is low enough that you'd check the available fault current before putting this on a 690 V bus. The 3-pole design and 800 V rated insulation voltage cover 480 V and 600 V class systems comfortably.
Trip unit and communication — ETU850 with data access
This breaker carries the ETU850 electronic overcurrent release, which means adjustable LSI protection (long-time, short-time, instantaneous) plus ground-fault alarm capability — the listing notes ground-fault monitoring is not built in, so that function would come from an external module if needed. The communication function is present, allowing integration with higher-level monitoring or energy management systems over the SENTRON bus or PROFIBUS/PROFINET via a communication module. Power loss is listed at a maximum of 48 W — relevant for thermal budgeting inside the enclosure, especially when multiple breakers are ganged. The front face carries IP40 protection, so it's suited for general indoor panel use but not washdown environments. Dimensions are 181 mm height, 105 mm width, 86 mm depth — standard 3VA2 frame size for a 250 A unit, which means it fits the same mounting footprint as other breakers in this family.