Line protection MCCB with high interrupting capacity
It carries a continuous current rating of 200 A at 40 °C, with a derating curve that holds 200 A steady up to 50 °C, then drops to 194 A at 55 °C, 188 A at 60 °C, 182 A at 65 °C, and 176 A at 70 °C — so in a warm enclosure you lose about 12% at the top end. The interrupting capacity is 220 kA at 240 V AC, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V; that 220 kA figure at 240 V tells you this breaker is sized for high-fault locations like a main service entrance or a transformer secondary where available fault current is well above typical panelboard levels.