Where this class of part is used
The 1SBL143001R8110: Electrical contactors in this segment switch motor or resistive loads inside control panels — the device the BOM line sits on is typically a coil-driven main contactor that an auxiliary circuit energises and de-energises. The class is the workhorse of motor starting, lighting banks and heater circuits, where the contactor's job is to make and break the power circuit under the coil's command rather than to provide protection.