SRN4018-221M is a semi-shielded power inductor from Bourns designed for high-current DC/DC converter applications. It features an inductance of 220 µH at 100 kHz with a 20% tolerance, a maximum profile height of 1.80 mm, and a quality factor (Q) of 30 at 0.796 MHz. The inductor has a maximum DC resistance of 3.552 O, rated RMS current of 0.28 A, and saturation current of 0.30 A, with a self-resonant frequency of 3 MHz. Operating over a temperature range of -40°C to +125°C, it is RoHS compliant and halogen-free, making it suitable for notebook computers, digital video cameras, HDDs, cell phones, and LCD displays where compact size and reliable performance are essential.