The Caterpillar 1138128 is a genuine OEM timer relay, a crucial electrical component designed for precise timing control in various heavy machinery and industrial applications. Operating at 48V DC, this multi-functional, multi-range solid-state timer is often cross-referenced with the high-quality Omron H3CR-A8 series. It features a DPDT output type and supports versatile mounting options including panel, surface, and DIN track. With dimensions of 48mm width, 48mm height, and 81.6mm length, and weighing approximately 0.1 kg, this robust relay ensures reliable operation across Caterpillar's extensive range of equipment, from excavators and loaders to track-type tractors and industrial engines.