Interrupting capacity is the headline here: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. The 4-pole construction lets it switch three phases plus neutral — common for 3-phase 4-wire distribution where you want the neutral switched for isolation.
Above 50 °C it starts to pull back: 76.8 A at 55 °C, 75.2 A at 60 °C, 73.6 A at 65 °C, and 72 A at 70 °C. If the breaker lives next to a hot transformer or drive in a sealed enclosure, that 70 °C derated figure is the one to wire the load for.
Auxiliary switching and mechanical endurance
This variant ships with 4 HQ auxiliary switches — high-capacity contacts rated for switching control circuits directly without an interposing relay.