What the ratings mean for fit
The Siemens SENTRON 3VA2225-6HN32-0AC0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C through 50 °C — meaning it holds full current without derating across the typical panel ambient range. Above 50 °C it derates linearly to 213 A at 70 °C, so if your enclosure runs hot (say near a drive bank), you need to account for that drop. The ETU350 electronic trip unit provides adjustable overload and short-circuit protection; it's a line-protection variant, so no ground-fault or communication functions are built in. Breaking capacity is the headline here: 242 kA at 240 V, 187 kA at 415 V, 121 kA at 500 V, and 6 kA at 690 V. That 242 kA at 240 V is exceptionally high — it's sized for large transformer secondaries or high-fault industrial distribution where standard MCCBs would need upstream fusing. At 690 V the 6 kA figure is modest; this breaker is not intended for 690 V high-fault applications. Dimensions are 181 mm height, 105 mm width, 86 mm depth — it fits standard SENTRON 3VA panel cutouts. The front face carries IP40 protection, so it's suitable for dry indoor panels but not washdown zones.
Integration and auxiliary options
The breaker ships with 2 auxiliary switches (HQ type) pre-installed — no separate auxiliary release or undervoltage release is fitted. The basic switch variant is 3VA2225-6HN32-0AA0. Maximum power loss is 48 W, so factor that into panel thermal calculations. Latching endurance is rated at 20,000 operations.