Siemens 3VA2116-5HN32-0AA0 — 160 A SENTRON MCCB with ETU350 Trip Unit
The Siemens 3VA2116-5HN32-0AA0 is a SENTRON 3VA2 series molded case circuit breaker (MCCB) rated for 160 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. That flat thermal curve is the headline feature for panel builders: you can load the frame to its nameplate 160 A in a warm enclosure without recalculating the ampacity. Three-pole construction with an ETU350 electronic overcurrent release. The ETU350 provides LI (long-time and instantaneous) protection, adjustable via rotary dials on the front face. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. The 690 V figure looks low because the 3VA2 frame is not optimized for high-voltage distribution — this breaker lives in 240–480 V switchgear where its SCCR headroom is generous.
For a service tech swapping a tripped breaker, the absence of a visual flag means you verify the trip by handle feel and load-side voltage check.