The JCB 72100736 Harness Start Relay is a genuine OEM component designed to provide reliable electrical control for the starting system in various JCB machinery. This essential relay ensures proper power distribution to the starter motor, facilitating consistent engine ignition. Manufactured to JCB's high standards, it guarantees compatibility and optimal performance for models including the 3CX, 4CX, and Loadall series. Dimensions are approximately 95mm length, 51mm width, and 30mm height, with a weight of 0.12 kg.