What this MCCB delivers on the line side
The Siemens SENTRON 3VA2116-5JQ32-0AA0 is a 3-pole molded case circuit breaker rated for 160 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. That makes it a solid choice for a feeder or large motor branch where the panel ambient runs warm and you want one part number that holds its rating. Interrupting capacity is 187 kA at 240 V, stepping down to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3.7 kA at 690 V. For a 480 V panel feeding a 160 A load, the 75.6 kA at 500 V bracket gives you headroom above typical 65 kA or 100 kA SCCR requirements — useful if the utility transformer is close or the fault current is hard to coordinate down. It carries ground-fault monitoring via summation current formation on the L-conductor, and a communication function for integration into a higher-level monitoring system. Rated insulation voltage is 800 V, so it's comfortable on 480 V or 600 V class systems without a voltage derating headache.
Panel fit and mounting
Dimensions are 181 mm height, 105 mm width, 86 mm depth — a standard MCCB footprint for this current class. It mounts on a DIN rail or can be screw-fixed to a backplate; the 86 mm depth leaves room for wiring gutters in a 600 mm deep enclosure. Maximum power loss is 25.5 W. In a sealed enclosure with multiple breakers, factor that into the thermal budget — at 160 A continuous load, the heat adds up if you stack several on a row.