The Zetor 931788 rectifier assembly, also known as a diode bridge, is a genuine OEM component designed for Zetor tractor alternators. This essential part ensures proper electrical current conversion, maintaining a stable power supply across a wide range of Zetor models, including the UR I, UR III, and Forterra series. It features a 115 mm outer diameter, 25 mm inner diameter, and operates at 14V with 6 diodes, ensuring reliable performance for your Zetor machinery.