The interrupting capacity is the headline number: 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. This variant is designated for line protection — it is not a motor-protective breaker with integrated overload class. It carries a shunt trip release (STL) as the auxiliary release, meaning it can be tripped remotely by applying voltage to the shunt coil.
The 3-pole, 63 A frame accepts busbar connectors for a common distribution bus. The shunt trip coil requires a separate control voltage — verify polarity and coil rating against your trip circuit before wiring. The breaker's power loss is rated at 4 W maximum, negligible for enclosure heat rise calculations at this frame size.