Rated 100 A, 3-pole, current-lifecycle
Rated 100 A means it handles that load continuously without tripping under normal conditions — the thermal-magnetic release (TMF) gives it a thermal element for overloads and a magnetic element for short circuits. That 100 A is the frame rating; the actual trip setting may be adjustable on the TMF unit, so verify the installed trip coil or dial matches your load.
Three-pole, three-phase design means it switches all three phases simultaneously — standard for motor branch circuits, feeder protection, and distribution panels. The XT4H frame size fits typical DIN-rail or panel-mount footprints for this class; verify the mounting pattern against your existing backpanel layout. Spring-cage or screw terminals on this frame accept copper conductors sized for 100 A — typically 25–35 mm² depending on the terminal spec. Strip length and torque values follow the ABB installation guide for the XT4 series; using ferruled stranded wire avoids whisker issues under the clamp.