The Siemens SENTRON 3VM1116-5GE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) designed for line protection, rated 160 A continuous at 40 °C and carrying a TM220 thermal-magnetic release. The TM220 designation means the thermal (overload) pickup is fixed at 100% of the 160 A frame rating, and the magnetic (short-circuit) pickup is fixed at 10× In — no field-adjustable trip unit, so what you see on the nameplate is what protects the feeder. That 160 A holds steady from 40 °C up through 50 °C (–), then derates to 158 A at 55 °C, 155 A at 60 °C, 153 A at 65 °C, and 150 A at 70 °C (–). The interrupting ratings are where this breaker earns its keep in high-fault installations: 187 kA at 240 VAC, 121 kA at 415 VAC, 76 kA at 440 VAC, and 17 kA at 500 VAC. For a 480 V panel on a 440 V system, the 76 kA SCCR gives plenty of headroom for most industrial service entrances.
Panel fit and thermal management
The 3VM1116-5GE42-0AA0 measures 101.6 mm wide, 130 mm tall, and 70 mm deep — a 4-pole MCCB that fits a standard 100 mm-wide DIN-rail or panel-mount footprint. Maximum power loss is 38 W at rated load, which is modest for a 160 A frame but needs to be factored into the enclosure's thermal dissipation calculation — especially if the panel packs several breakers side by side.