At 240 V it interrupts 52.5 kA; at 415 V that drops to 32 kA, then 13.6 kA at 440 V, and 7.5 kA at both 500 V and 690 V. That's a steep derate curve — check your system's available fault current at the actual line voltage, not the highest number on the label.
The shunt trip lets a remote signal — from an E-stop, fire alarm relay, or PLC output — trip the breaker without anyone pulling the handle. The two auxiliary switches give you status feedback: one typically wired to a PLC input for 'breaker open/closed', the other for a remote annunciator or a second control system. No undervoltage release on this unit, no ground-fault monitoring, and no communication module. If you need UVR or ground-fault protection, this isn't the variant — you'd step to a different suffix in the 3VA family. The basic switch assembly is order code 3VA10322ED320AA0, which is the internal mechanism; you're buying the complete breaker, not a kit.
That covers most indoor panel environments, including unheated warehouses. The current derating above 50 °C is mild — still 30 A at 70 °C — so you don't lose much headroom in a hot cabinet.