The 3-pole design fits three-phase motor loads up to 55 W operating power at AC-3 duty at 400 V, which is the standard motor-switching category per IEC 60947-4-1.
This MCCB's interrupting rating varies sharply with system voltage: 187 kA at 240 V AC, 121 kA at 415 V, 30 kA at 440 V, and 17 kA at 690 V. At 690 V the 17 kA rating is adequate for typical 690 V motor control centers but not for high-fault utility tie points.
Thermal derating — don't lose capacity to heat
Above that it derates: 153.6 A at 55 °C, 150.4 A at 60 °C, 147.2 A at 65 °C, and 144 A at 70 °C.
Auxiliary contacts and protection class
The breaker ships with 3 auxiliary switches (HQ type) — these are factory-installed, not field-added. They provide status feedback (open/closed/tripped) to a PLC or indication lamp without external interposing relays.