It carries a 50 A continuous rating at 40 °C and holds that current flat through 50 °C — only dropping to 49 A at 55 °C and 45 A at 70 °C, so you don't lose headroom just because the panel runs warm.
That's a high-fault rating for a 50 A frame — it can clear a bolted fault on a large transformer secondary without upstream fuses having to coordinate. The 2-pole format means it fits single-phase or DC circuits up to 250 V DC, and the IP40 front keeps dust and accidental contact out of the enclosure face.
Dimensions are 70 mm deep, 50.8 mm wide, 130 mm tall — the 2-pole width (about 2 inches) slots into a standard MCCB footprint.