SRR4018-121Y is a shielded SMD power inductor from the Bourns SRR4018 series, designed for use in DC-DC converters and power supply applications. It features an inductance of 120 µH at 100 kHz with ±30% tolerance, a maximum DC resistance of 1950 mO, and a self-resonant frequency of 10 MHz. The inductor supports an RMS current rating of 0.33 A and a saturation current of 0.28 A, with a compact 2.0 mm height profile. Operating over a temperature range of -40°C to +125°C, this RoHS-compliant component is ideal for portable communication equipment, camcorders, and LCD TV power supplies.