Siemens 3VA2225-5KP32-0DH0 — 250 A SENTRON MCCB with ETU850 Trip Unit
Interrupting Capacity and Selectivity Headroom
At 240 V the 3VA2225-5KP32-0DH0 breaks 187 kA — that is full rated short-circuit capacity, not a conditional rating. At 415 V it holds 121 kA, and at 690 V it still clears 5.1 kA.
Thermal Derating and Continuous Current
Above that it steps down: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. If the panel ambient runs at 60 °C, the breaker is good for 225 A continuous — useful for a panel OEM wireman sizing the main disconnect in a non-air-conditioned enclosure. Maximum power loss is 50.5 W, which factors into the enclosure heat budget.
Trip Unit and Auxiliary Components
The ETU850 is an electronic trip unit with communication capability — it can report status and trip events over the integrated communication function. A mechanical trip indicator is present. There is no voltage-trigger function and no phase-failure detection on this variant.
Mounting Dimensions and Panel Fit
A panel that was laid out for a similar-frame 3-pole MCCB (such as the 5SQ2370-2YA05 series) will accept this breaker without rewiring, provided the busbar or cable lugs match the 250 A terminal rating.