The Komatsu ST00403572 is a genuine OEM relay module, an essential electrical component designed for reliable operation across a wide range of Komatsu heavy machinery. This module provides critical control for electrical systems in various models, including PC series excavators, D series dozers, WA series wheel loaders, GD series motor graders, HM series articulated dump trucks, and HD series rigid dump trucks. It measures 88.9 mm in length, 63.5 mm in width, 38.1 mm in height, and weighs approximately 0.113 kg, ensuring precise fitment and robust performance.