It is a transport accessory, not a functional component in the operating circuit — its job is to prevent the coil from shifting or dislodging during shipping and handling before the contactor is installed in the panel. Dimensions are compact: 4.5 mm depth, 17.6 mm width, and 23 mm height, sized to fit the specific slot in TeSys Deca reversing contactor assemblies.
The LAD9R11 is now obsolete per the manufacturer's lifecycle status. If you are qualifying a new build or maintaining an existing BOM line that calls out LAD9R11, the procurement path is a last-time-buy or surplus/broker channel; plan for a one-time bridge quantity or a requalification to a current-production alternative.