What this MCCB delivers on a high-fault line
The Siemens 3VA2116-8KP42-0AA0 is a 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. With a 4-pole configuration and the ETU850 electronic trip unit, it handles line protection duties where fault current potential is extreme: 440 kA at 240 VAC, 330 kA at 415 VAC, and still 52.5 kA at 690 VAC. That SCCR headroom means it sits comfortably upstream of high-fault transformers or busways without cascading failure risk. The ETU850 is an electronic trip unit — not a thermal-magnetic — so it gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. That matters when coordinating with downstream feeders on a motor control center or distribution panel: you dial in selectivity without swapping trip units. Communication function is onboard, so it can talk to a BMS or SCADA for load shedding and event logs. Panel footprint is 86 mm deep by 140 mm wide by 181 mm tall. Front protection is IP40, meaning it's splash-proof on the panel face but not sealed for washdown environments. Mounts on a standard DIN rail or direct panel-mount, with optional motor drive available for remote tripping.
Integration into a panel
At 86 mm deep, this MCCB fits standard enclosures with room for wiring gutters. The 140 mm width means it occupies four DIN spaces if rail-mounted. Power loss is 19.7 W maximum. The ETU850 draws its own power from the line-side current transformers — no auxiliary supply needed for the trip unit. Communication connection uses the standard 3VA plug-in module interface; verify the specific protocol module (PROFIBUS, PROFINET, Modbus) is ordered separately if needed.