What this MCCB delivers on the critical path
The Siemens SENTRON 3VA2116-5HN32-0BB0 is a 3-pole molded case circuit breaker rated for 160 A continuous current, with an ETU350 electronic trip unit configured for line protection. Its breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V and 440 V, 76 kA at 500 V, and 3.8 kA at 690 V — so at standard 400 V distribution it clears faults up to 121 kA without cascading upstream. That SCCR headroom matters when you're coordinating a panel for a shutdown window: you want the main breaker to hold, not blow a hole in your selectivity study.
Trip unit and thermal performance
The ETU350 electronic trip unit offers adjustable long-time delay (tr) from 0.5 to 17 seconds and short-time delay (tsd) from 0.02 to 0.4 seconds, giving you flexibility for coordination with downstream breakers. The breaker holds its full 160 A rating across the ambient range from 40 °C to 70 °C — no derating curve to chase in a hot panel. Maximum power loss is 25.5 W, so ventilation planning is straightforward.
Panel fit and environmental limits
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard MCCB footprint that drops into most SENTRON distribution panels without re-drilling. Front-face protection is IP40, suitable for enclosed panel mounting. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. No communication function on this variant — it's a straight line-protection breaker, no Modbus or PROFINET module onboard.