Its TM220 thermal-magnetic release provides fixed overload and short-circuit protection curves — no adjustment dials, so you spec it for a known load and leave it. Rated 160 A continuously at 40 °C ambient, it holds that rating up to 50 °C before derating starts; at 55 °C it's 158 A, at 60 °C it's 155 A, and at 70 °C it's 150 A — useful if your panel runs hot or is in a non-climate-controlled enclosure. The interrupting capacity tells you where it can go: 187 kA at 240 V AC, 121 kA at 415 V, 76 kA at 440 V, and 17 kA at 500 V. That 187 kA at 240 V is high enough for most secondary distribution in North American 277/480 V panels where the fault current at the breaker is typically under 100 kA; the 121 kA at 415 V covers European 400 V systems with high fault levels near the transformer. Front protection is IP40 — no water ingress protection, so mount it in a dry cabinet, not in a washdown area.
The breaker measures 101.6 mm wide, 130 mm tall, and 70 mm deep — a standard 4-pole MCCB footprint that fits most DIN-rail or screw-mount backplates. If you need remote tripping or status feedback, you'll add an external accessory.