SENTRON 3VA2140-6HK42-0AA0 — 40 A MCCB with ETU340 trip
Breaking capacity hits 242 kA at 240 V AC, dropping to 187 kA at 415/440 V, 121 kA at 500 V, and 3.7 kA at 690 V. The 690 V rating is low — this isn't your motor-circuit breaker for 690 V drives; it's a line-protection device sized for 40 A feeders.
The 140 mm width across 4 poles is typical for this class. Power loss is rated at 1.6 W maximum. That's low enough that derating for adjacent breakers in a multi-pole group is minimal, but if you're packing six of these side-by-side in a 40 °C enclosure, you still want to run a thermal calc.