What this MCCB is and what it does
The Siemens SENTRON 3VA2116-5HN36-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated for 160 A continuous current across its full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It's designed for line protection in distribution panels, meaning its trip curve is shaped to protect feeder cables and busbars rather than individual motor loads. The interrupting ratings are substantial: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That kind of headroom at common distribution voltages makes it a solid choice for high-fault-capacity main or subfeed positions where you need selectivity with downstream breakers.
Sizing and fit in the panel
Physical footprint is 105 mm wide by 181 mm tall by 86 mm deep — that's a standard 3-pole MCCB envelope for this class, so it'll drop into most existing panel layouts without re-drilling the backplate. The 105 mm width means it occupies roughly four 27 mm module spaces on a DIN rail if the panel uses that layout, though the 3VA series typically mounts via screw-on lugs to a busbar system. The shunt trip (STL) auxiliary release and the 2 auxiliary switches plus 1 trip alarm switch (HQ) are factory-fitted, so you don't have to carve out extra space for add-on modules in the field.