The Siemens 3VA2216-8HM42-0AA0 is a 4-pole SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous current, flat from 40 °C through 70 °C — no derating needed across the typical panel ambient range. It uses the ETU330 electronic overcurrent release, which gives you adjustable N-conductor protection (OFF, 50%, or 100%) and a trip indicator that signals a fault condition without opening the door. Breaking capacity is 440 kA at 240 V, 330 kA at 415/440 V, 220 kA at 500 V, and 52.5 kA at 690 V — this is a high-interrupting frame suited for main feeders or large sub-distribution where fault currents run high.
The 4-pole width is the dimension to check against existing busbar or enclosure clearance — the 3VA2 family shares a common depth and height across frame sizes, so a panel designed for a lower-rated 3VA2 will accept this unit without enclosure modifications.
The ETU330 release provides electronic adjustability for long-time pickup, short-time, and instantaneous settings — not a fixed thermal-magnetic curve. The storage minimum is the handling limit, not a running condition.