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This heat sink is a thermal management component that draws heat away from power devices in boiler and burner electronics, preventing overheating and ensuring stable operation. It is typically made of aluminum or copper with fins to maximize cooling. In heating equipment, where components like transistors and rectifiers generate significant heat, a properly functioning heat sink is essential for longevity. Whether you are repairing a burner control board or a boiler power module, this heat sink helps maintain safe operating temperatures and system reliability.