The interrupting ratings are 65 kA at 240 V and 25 kA at 480 V — that 65 kA figure at 240 V means it can safely clear a fault current up to that level on a 240 VAC line without welding contacts or rupturing the case, which is the spec that decides whether this breaker holds on a high-fault panel. The 25 kA at 480 V covers standard 480 VAC distribution. The TM210 release gives a fixed instantaneous trip at 350 A (10× Ir), so it's sized for motor or general branch-circuit protection where you want magnetic trip above inrush.
The breaker holds its full 35 A rating from 40 °C up to 50 °C, then derates to 34 A at 55 °C and 32 A at 70 °C — so in a warm enclosure near the top of a panel, you still get nearly full current. Dimensions are 76.2 mm wide, 129.4 mm high, 75.1 mm deep, which is the standard 3-pole MCCB footprint for a SENTRON 3VA4 frame.