Breaking capacity is the headline here: 187 kA at 240 V AC, 121 kA at both 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V.
If this breaker lives in a non-ventilated enclosure next to other heat sources, check the 55 °C column (154 A) or 60 °C (148 A) — the 160 A nameplate is only valid if your panel ambient stays under 50 °C.
Auxiliary contacts and trip unit
Comes with three auxiliary switches (HQ type) built in — these are the form-C contacts that signal breaker position (open/closed/tripped) back to a PLC or status lamp. No undervoltage release, no shunt trip, no ground-fault module on this variant; if you need those, you're looking at a different suffix in the 3VA2 family. Maximum power dissipation is 25.5 W at rated load. That's the heat the breaker dumps into the enclosure at full 160 A — factor it into your panel thermal budget, especially if the MCCB is enclosed with other heat-generating gear.