The Siemens SENTRON 3VA2116-6JP36-0AA0 is a 3-pole molded case circuit breaker rated for a continuous current of 160 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. The ETU550 electronic trip unit gives you adjustable long-time (tr) from 0.5 to 20 s and short-time (tsd) up to 0.5 s, so you can shape the curve for selective coordination downstream.
The IP40 front protection means it's suited for enclosed panels where the door provides the environmental seal. Maximum power loss is 25.5 W — relevant for thermal calculations in a densely populated enclosure.