The DLD-102U-3A is a Ferrocore made by AT&T Microelectronics. It is a small discrete magnetic inductor specifically designed for high temperature applications. It is a high quality surface mountable device that operates over a wide temperature range from -40 to +125°C. The device has an inductance of 102µH, a maximum DC current of 3 Amps, and a dc resistance of 28.9mO. It is designed to have high frequency noise rejection, low profile, and high temperature characteristics, making it suitable for use in power supplies, filters, and switching regulators.