SDE0403A-120M is an automotive-grade SMD power inductor designed for high-performance switching applications. It features an inductance of 12 µH with ±20% tolerance, a typical DC resistance of 0.146 O, and a saturation current of 1.3 A, supporting an RMS current rating of 1.0 A. The inductor operates across a temperature range of -40°C to +125°C with a typical temperature rise of 40°C at rated current, and exhibits a self-resonant frequency of 32 MHz. With compact dimensions of 4.5 × 4.0 × 3.2 mm, ferrite core construction, and enameled copper windings, this component is ideal for power supply circuits, DC-DC converters, and automotive power management systems requiring high reliability and compliance with AEC-Q200 and RoHS standards.