Rating and trip unit — what the numbers mean for panel coordination
The 3VA2116-8KP46-0AA0 is a Siemens SENTRON molded case circuit breaker rated for 160 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. That 160 A holds at every 5 °C increment, per the datasheet, so you can size the bus and downstream conductors to a flat 160 A without calculating temperature correction factors for the breaker itself. The ETU850 electronic trip unit gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. This is a line-protection design (not motor or generator protection), so the trip characteristics are optimized for feeder and distribution panels where selectivity with downstream breakers matters. The communication function allows integration with a BMS or SCADA for remote trip indication and power monitoring — useful for a plant engineer tracking fault events without walking the panel. Breaking capacity is specified per voltage: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. At 415 V — common for industrial distribution in many regions — the 330 kA rating covers virtually any fault level you will encounter on a secondary substation bus. The 690 V figure of 52.5 kA is still substantial for a 160 A frame; it handles high-impedance faults on 690 V mining or marine systems without cascading upstream.
Lifecycle and sourcing posture
This part carries a lifecycle status of current, meaning Siemens continues to manufacture it as an active catalog item. No end-of-life notice or last-time-buy window applies at this time. For a procurement or MRO planner, that means the BOM line is stable — no need to qualify a substitute or stockpile for obsolescence.
Physical fit and panel integration
Dimensions: 86 mm depth, 140 mm width, 181 mm height. That 140 mm width is standard for a 4-pole MCCB in the 3VA frame size — it occupies three 45 mm pole-widths plus one neutral pole. The IP40 front protection means it is suitable for installation in a closed panel where the front face is protected against tools and solid objects larger than 1 mm; no special sealing required for the enclosure door. Mounting is via the standard 3VA base plate or DIN rail adapter (not included). The 86 mm depth leaves clearance for rear-access busbars or plug-in bases in a typical 600 mm deep enclosure. Panel builders should verify the terminal spread against the busbar drilling pattern — the 4-pole layout at 140 mm width is a common footprint, so it drops into most distribution boards without re-drilling.