400 A MCCB with 187 kA interrupting capacity
Its interrupting capacity reaches 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — covering most industrial distribution voltages without needing a current-limiting upstream device.
Rated continuous current holds at 400 A up to 50 °C ambient, then derates to 384 A at 55 °C, 376 A at 60 °C, 368 A at 65 °C, and 360 A at 70 °C. For a panel running at 55 °C ambient, expect 384 A continuous capability — factor that into busbar and cable sizing.