Breaking capacity is the headline number here: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. Insulation voltage rated 800 V.
That 140 mm width on a 4-pole MCCB is standard for the SENTRON 3VA2 frame — it fits the same mounting footprint as other breakers in this series, so a panel laid out for a 3VA2 4-pole will accept this unit without re-drilling the backplate. Front protection is IP40 — fine for a closed panel door. It's a straight line-protection breaker; if you need those functions, you'd step to a different suffix in the 3VA2 family.