It's built for line protection — think main feeder or large subfeed in a distribution panel — not for motor or generator protection. The thermal-magnetic release (TM240) handles overload and short-circuit tripping without an external trip unit. Breaking capacity hits 220 kA at 240 V, 154 kA at 415 V, 36 kA at 440 V, and 17 kA at 690 V, so it's got headroom for high-fault industrial services where the available short-circuit current is stiff. The 4-pole construction means it switches all phases plus neutral — typical for TN-S or TN-C-S systems where you need full isolation. No undervoltage release, no shunt trip, no ground-fault module fitted from the factory; this is a straight thermal-magnetic breaker. Dimensions are 70 mm deep by 140 mm wide by 158 mm tall — standard 4-pole MCCB footprint for a 250 A frame.
Rated continuous current Iu is 250 A, but that's at 40 °C ambient. The 3VA1225-6EF42-0AE0 holds 250 A flat through 50 °C, then starts to taper: 243.3 A at 55 °C, 236.5 A at 60 °C, 229 A at 65 °C, and 223 A at 70 °C.
What the auxiliary contacts give you
The breaker ships with four auxiliary switches (HQ type) already fitted. No separate aux kit to order — it's on the breaker from the factory.