What the ratings mean for the panel
The Siemens SENTRON 3VA2116-8KQ42-0AA0 is a 4-pole molded case circuit breaker rated for a continuous current Iu of 160 A — that's the current it carries without tripping under normal load, and it holds that rating across the full ambient range from 40 °C to 70 °C, so no derating curve to chase in a warm enclosure. The ETU860 electronic trip unit gives you adjustable N-conductor protection (OFF, 20% to 100%) and ground-fault monitoring via summation current of L+N conductors — useful for a 4-wire distribution panel where you need to detect leakage on the neutral without a separate core-balance transformer. Breaking capacity hits 440 kA at 240 V and still delivers 330 kA at 415/440 V, so it's sized for high-fault infrastructure — main switchboard or large sub-distribution where the available fault current is substantial. The front face carries IP40 protection, which is standard for a panel-mounted device — no special sealing for washdown, but fine inside a locked cabinet with a gland plate.
Lifecycle and sourcing posture
Rated insulation voltage is 800 V, and the maximum power loss at rated load is 19.7 W — that's the heat you need to vent from the enclosure, not a selection parameter but a ventilation-planning number.
Mounting and integration
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — fits a standard MCCB cutout in a distribution panel; the 140 mm width is typical for a 4-pole frame at this rating. Communication function is built in, so you can integrate it with a higher-level monitoring system without an add-on module — check the ETU860 manual for protocol specifics. Storage temperature range from -40 °C to 80 °C covers cold warehouses and hot shipping containers; operating range is -25 °C to 70 °C, which is the window for the trip unit's accuracy.