The Siemens 3VA2116-0HL46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 160 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Four poles, line-protection design, with an ETU320 electronic overcurrent release that gives adjustable N-conductor protection (OFF, 50%, 100%). Breaking capacity hits 440 kA at 415 V AC and 187 kA at 690 V AC — that is the interrupting rating the breaker can clear under fault without welding contacts or cascading upstream. Dimensions are 181 mm high, 140 mm wide, 86 mm deep.
How the ETU320 release shapes selectivity
The ETU320 is an electronic trip unit — not a thermal-magnetic. That means the long-time, short-time, and instantaneous pickup bands are adjustable, which matters for selective coordination downstream. The N-conductor protection can be set to OFF, 50%, or 100% of the phase pickup, giving the panel designer control over ground-fault coordination without a separate module.