What this MCCB is for
The Siemens 3VA2116-7HN46-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous rated current of 160 A at ambient temperatures from 40 °C up to 70 °C — no derating across that range, which simplifies panel layout when the breaker sits near other heat sources. The 800 V rated insulation voltage suits it for 400 V and 690 V line-to-line systems, though the interrupting capacity at 690 V drops to 3.7 kA, so it's best applied at 415 V or below where it delivers 242 kA breaking capacity.
Trip unit and protection profile
The ETU350 electronic trip unit is a microprocessor-based release that gives adjustable overload and short-circuit protection curves. It's a step up from thermal-magnetic releases for selectivity coordination — you can dial in the long-time pickup and delay, short-time pickup and delay, and instantaneous pickup. That matters when you're cascading breakers downstream and need the upstream device to ride through a fault on a branch without tripping the main. No undervoltage release and no ground-fault monitoring are built in; those are add-on accessories if your application requires them.
Panel fit and environment
The 3VA2116-7HN46-0AA0 measures 140 mm wide, 181 mm high, and 86 mm deep. That's a standard 4-pole MCCB footprint for the 3VA2 frame size — it bolts into a panel on a mounting plate or DIN rail adapter, not a direct snap-on. The front face carries an IP40 protection class, meaning it's protected against tools and wires >1 mm but not against water ingress; keep it inside a dry enclosure. Operating range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. Power loss at rated current is 25.5 W maximum — account for that in enclosure thermal calculations if you're packing multiple breakers in a small cabinet.