This 12V starter relay is compatible with the following part numbers: 63070, 62135, 74900, 2875714, and 70715.It fits models including ST17, S2000, A2500, U4500, ATV2500, Terra25, LT2000, PE2.5, and X3000.The relay uses a small control current to engage the starter , supplying power to the starter motor to enable engine cranking.It is constructed with copper, plastic, and metal components.The electrical winding uses enameled wire, and the housing incorporates PA66 or PBT plastic for thermal stability.The relay is rated for 12V and 250A load capacity.