What it is and what it does
The SENTRON 3VA2116-5HN36-0CH0 is a 3-pole molded case circuit breaker (MCCB) rated for 160 A continuous current — that's the number that decides whether it carries your feeder or main without nuisance tripping. It's designed for line protection, meaning it sits upstream protecting a distribution bus or a large load, not a branch circuit. Interrupting capacity is where this thing earns its keep: 187 kA at 240 V AC, 121 kA at 415 V, and still 75.6 kA at 500 V. At 690 V it drops to 3.7 kA — that's still useful on a 690 V bus with moderate fault current, but you'd check the available fault current before committing.
Lifecycle and sourcing reality
Power loss at full load is 28 W — that's the heat you have to vent from the enclosure. For a 160 A frame that's modest; it won't force a bigger cabinet or an auxiliary fan in most industrial panels. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. The storage range is wider because it's not carrying current — that's the limit for warehousing or shipping in a frozen truck.
Panel integration notes
Mounts on a standard DIN rail or directly to a backplate — the 3VA2 frame uses the same footprint as other 160 A SENTRON MCCBs, so if you're replacing one, the bus bars and lug kit should transfer. The trip indicator on the front gives a visual red flag when it's tripped, which saves a multimeter walk on a crowded panel.