This MCCB delivers 121 kA at 240 V AC, 76 kA at 415 V AC, and 53 kA at 440 V AC.
Thermal derating — don't size by the 100 A label alone
At 55 °C it derates to 98 A, at 60 °C to 96 A, at 65 °C to 94 A, and at 70 °C to 91 A. If this breaker lands in a warm enclosure — near transformers, drives, or in a non-climate-controlled electrical room — use the 55 °C or 60 °C column for sizing. The TM220 release compensates thermally, so the trip curve shifts with ambient; the continuous current table is the safe conductor-sizing reference.
The 3VA1110-4FE42-0AA0 measures 130 mm high, 101.6 mm wide, and 70 mm deep. The 4-pole footprint is wider than a 3-pole MCCB; verify the DIN-rail space in your enclosure before cutting the backplate.