That keeps the bill of materials simple and the failure mode predictable.
At 240 V AC this MCCB interrupts 187 kA — a figure that covers virtually any fault downstream of a large transformer or generator. At 415 V it still holds 121 kA, and at 440 V it drops to 75.6 kA. For a 32 A frame those numbers are high, which means the breaker can be used as a main or feeder device in high-fault installations without cascading upstream.
Current rating holds at 32 A from 40 °C through 50 °C, then drops to 31 A at 55 °C and 60 °C, and to 30 A at 65 °C and 70 °C. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall, fitting a standard 3-pole MCCB footprint on a DIN rail or mounting plate. Maximum power loss is 10.6 W, so thermal rise inside a small enclosure is manageable.