The Siemens 3VA1116-4EF36-0JH0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for line protection duty, carrying a continuous current Iu of 160 A and a rated insulation voltage Ui of 800 V. It uses a TM240 thermal-magnetic overcurrent release, so the thermal pickup is fixed at 160 A and the magnetic trip threshold is set at 240 A — a common pairing for feeder or main-switch applications where you need the magnetic hold above the continuous rating to avoid nuisance trips on motor inrush. Breaking capacity runs from 121 kA at 240 V down to 11.9 kA at 690 V, which covers most low-voltage distribution panels. The 75.6 kA at 415 V is the figure to check if your service transformer is close-coupled — that is where the fault current is highest in a 400 V-class installation.
The breaker is rated a flat 160 A from 40 °C to 50 °C ambient. Above that, it derates to 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C. Front-face protection is IP40, so the breaker is splash-safe on the front but not sealed against dust ingress into the enclosure. Physical footprint is 130 mm tall by 76.2 mm wide by 70 mm deep — a standard 3-pole MCCB width that fits most DIN-rail or panel-mount backplates without a sub-plate adapter.
Integrated Shunt Trip and Auxiliary Release
Operating temperature range is -25 °C to +70 °C, storage from -40 °C to +80 °C. The trip indicator is present, and the voltage-trigger function is enabled — meaning the shunt trip can be wired to a remote emergency-stop pushbutton or a safety relay without an intermediate contactor.