Its headline breaking capacity hits 242 kA at 240 V AC, dropping to 187 kA at 415 V and 440 V, then 121 kA at 500 V, and 4.5 kA at 690 V — meaning it handles high-fault utility feeds at lower voltages but derates sharply above 500 V, so verify the available fault current at your system voltage before specifying. Thermal derating is published across the full 40 °C to 70 °C ambient range: the breaker holds its full 250 A rating up to 50 °C, then steps down to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. That curve lets you size the breaker for a warm enclosure without guessing — the 250 A frame is good for most standard panel environments, but a 65 °C switchroom knocks 28 A off the continuous capacity.
The 3VA2225-6HL32-0AJ0 measures 105 mm wide, 181 mm tall, and 86 mm deep — a 3-pole MCCB footprint that fits standard Siemens SENTRON mounting bases and busbar systems.