It carries a 121 kA breaking capacity at 240 V AC, stepping down to 75.6 kA at 415/440 V, 52.5 kA at 500 V, and 3 kA at 690 V — the SCCR you need depends on your system voltage and fault current available.
The 4-pole configuration (switched neutral) is typical for TN-S or IT systems where you need full isolation. Breaking capacity at 240 V (121 kA) covers high-fault utility feeds; at 690 V the 3 kA limit means this breaker is not for 690 V motor circuits unless the fault current is very low.
