The breaker is rated for a continuous current of 160 A across the 40 °C to 50 °C ambient range, then derates to 150 A at 70 °C. That derating curve matters if you are packing this into a warm enclosure — at 70 °C you lose 10 A of headroom.
Breaking capacity — the real fault-handling number
At 415 V, that is still a very high fault-current capability — enough for most industrial distribution panels downstream of a large transformer. If you are using it on a DC bus, check the 3VA device manual for DC-specific derating; the manufacturer flags that separately.
The breaker measures 130 mm high, 50.8 mm wide (2 inches — standard MCCB pole spacing), and 70 mm deep. This is a straight thermal-magnetic breaker with a trip indicator absent; you will see the handle position, not a flag.