What this 47 µH shielded inductor does on the board
The LQH43PH470M26L is a drum-core wirewound inductor from Murata's LQH43 series, built on a ferrite core with full magnetic shielding. The shield contains the flux field so the inductor can sit next to sensitive analog or RF circuitry without coupling noise into adjacent traces — a common headache in dense mixed-signal boards. Rated at 47 µH ±20% with a continuous DC current of 520 mA, it handles moderate power-supply filtering and DC-DC converter output ripple roles. The saturation current is 470 mA, meaning the inductance starts to roll off above that point — keep the peak inductor current below that figure to stay in the linear region. The self-resonant frequency is 8 MHz, which sets the upper bound for useful filtering — above that frequency the inductor behaves capacitively, so it is best suited for switching regulators switching in the hundreds-of-kHz range.
AEC-Q200 qualification and automotive-grade reliability
This inductor carries AEC-Q200 qualification, the passive-component stress-test standard for automotive electronics. For engine-bay or high-ambient applications above 85°C, you would need a wider-temperature-grade part.
Package and board-fit details
The footprint is not a standard 1812 or 1212 — verify the land pattern against the manufacturer's recommended pad layout before committing the PCB. Available in Tape & Reel (TR) or Cut Tape (CT) packaging. The TR option is the production-friendly reel for pick-and-place; CT is for prototyping or small-batch builds. The base product number is LQH43PH, so the full 14-character code LQH43PH470M26L encodes the inductance, tolerance, and packaging variant.