This genuine Landini 3552686M91 electrical relay is a 12V, 40A, 5-pin component designed for reliable performance in agricultural machinery. It is an OEM part compatible with a wide range of Landini tractors, including models from the Series 4, Series 5, Series 6, Series 7, Series 8, REX 3, REX 4, and MISTRAL 2 series. This relay ensures proper electrical circuit control and is also cross-referenced as an OEM part for Massey Ferguson and McCormick equipment.