What the ratings mean for fit
The Siemens SENTRON 3VA2116-4HM42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 160 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. The ETU330 electronic trip unit provides adjustable overload and short-circuit protection with an LSI curve (long-time, short-time, instantaneous), plus adjustable N-conductor protection (OFF, 50%, or 100% of the phase current). Breaking capacity reaches 121 kA at 240 V AC and 75.6 kA at 415 V AC, which covers most industrial service-entrance and distribution panel fault levels; at 690 V AC the capacity drops to 3.7 kA, so verify the available fault current at that voltage before specifying.
Integration and mounting
The 3VA2116-4HM42-0AA0 mounts in a standard distribution panel or enclosure with a front IP40 protection rating. Dimensions are 86 mm deep, 140 mm wide, and 181 mm high — verify cutout and busbar spacing against the existing panel layout. The ETU330 trip unit is field-adjustable; no communication function or undervoltage release is fitted on this variant.