It carries 440 kA interrupting capacity at 240 V AC, stepping down to 330 kA at 415 V and 220 kA at 500 V, with a 52.5 kA floor at 690 V. That's a high-interrupting frame for a 40 A breaker, giving selectivity headroom upstream of a distribution board.
The ETU350 electronic trip unit is a line-protection design — it's not a motor-protection or ground-fault variant. The breaker is purely a thermal-magnetic replacement with electronic curve shaping for selectivity coordination on a feeder.
Dimensions are 181 mm high, 140 mm wide, 86 mm deep — a standard 4-pole MCCB footprint for a 160 A frame.