Description Regulator, 12 volt. Flat mount, 3 terminals. For tractors with generators. Replaces Delco regulator 1119000, 1119000, 35A5137. This item is a suitable alternative for the following: 121579C1, 1118897, 1119000, 121579C91, 35A5137, A-121579C1, A121579C1