What this MCCB is and where it fits
The Siemens SENTRON 3VA2116-7HN36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 160 A continuous current at 40–70 °C with no derating across that range — it holds 160 A all the way up to 70 °C ambient, which is unusual and simplifies panel sizing in hot environments. It carries an ETU350 electronic trip unit, meaning the overload and short-circuit protection curves are adjustable and more precise than a thermal-magnetic — useful for selectivity coordination downstream of a transformer or upstream of motor feeders. The interrupting ratings are high: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V — so it can sit ahead of a high-fault panel without needing a current-limiting fuse upstream.
Mounting and panel fit
Dimensions are 181 mm high, 105 mm wide, 86 mm deep — a standard 3-pole MCCB footprint for the 3VA frame size. The front face carries IP40 protection, so it's suited for enclosed panel mounting where tools or fingers won't contact live parts. Rated insulation voltage is 800 V, and the part is designed for line protection (not motor protection) per the product version field — the ETU350 can be set for long-time, short-time, instantaneous, and ground-fault (though this unit ships without ground-fault monitoring).
Lifecycle and sourcing reality
Maximum power loss is 25.5 W, which matters for enclosure thermal rise calculations when multiple breakers are ganged in a panel. Storage temperature range is -40 °C to 80 °C; operating ambient is -25 °C to 70 °C.