MCCB for high-fault panels — 63 A continuous, 187 kA interrupt capacity
The Siemens 3VA1163-5EF36-0CC0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a TM240 thermal-magnetic release that handles overload and short-circuit protection in one package. The headline number here is the interrupting capacity: 187 kA at 240 V AC and 121 kA at 415 V AC — that puts this breaker in the high-fault-current tier, sized for main or feeder positions where upstream transformer capacity or utility fault levels would blow past a standard 25 kA or 36 kA MCCB. At 690 V it still holds 17 kA, so it works in 480/277 V or 600 V industrial systems without derating the interrupt rating below the available fault current. The 70 mm depth and 76.2 mm width fit the standard SENTRON 3VA footprint, meaning it drops into existing panel layouts that already carry 3VA breakers.
Thermal derating and release design — TM240 with undervoltage trip
The TM240 release is a fixed thermal-magnetic type — no electronic adjustment, no communication module, no ground-fault monitoring. It holds 63 A straight up to 50 °C, then steps down to 60.48 A at 55 °C and 56.7 A at 70 °C. That derating curve means in a warm enclosure (say 55 °C ambient) you need to account for roughly 4 % headroom loss. The breaker includes an undervoltage release (UVR) as the auxiliary trip — part number 3VA9608-0BB24 — which drops the breaker when control voltage falls below the dropout threshold, standard for emergency-stop or undervoltage protection schemes. Two HQ auxiliary switches are built in, giving status feedback for the open/closed position without needing an add-on module.
Panel integration — IP40 front, DIN-rail or screw-mount
Front face carries IP40 protection — fine for a dry indoor panel, not for washdown. The 70 mm depth leaves room behind the door for wiring gutters; the 76.2 mm width matches the standard 3VA mounting footprint (screw-mount base, optional DIN-rail adapter). Operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Reference code per DIN EN 81346-2 is Q (switching device).