DL1812-39 is a type of Ferrocore core winding wire that is used for electrical applications. It is a copper-clad steel construction, with a copper content of 39%, making it suitable for use in high temperature environments. The core wire is UL 90°C rated with a maximum working temperature of -60°C to +180°C. It is designed to provide flexibility and a high level of electrical resistance, while also being highly durable and resistant to corrosion. DL1812-39 is commonly used in commercial, industrial, medical, and military electronic applications, such as motors, coils, and transformers.