3.3 µH Shielded Ferrite Drum Core — DC Bias and Thermal Headroom
The LQH43PB3R3M26L is a shielded ferrite drum-core wirewound inductor from Murata's LQH43 series, in a 1812 (4532 Metric) surface-mount package. Its 3.3 µH ±20% inductance is specified at 1 MHz test frequency. Rated for 1 A continuous current with a maximum DCR of 62.4 mOhm. The saturation current (Isat) is 1.8 A, so the core holds its inductance well past the rated DC bias — the 1 A continuous rating is thermally limited by the DCR loss, not the core saturation knee. Self-resonant frequency is 40 MHz. Above that frequency the component behaves capacitively, so for a buck converter switching at 2 MHz or a Pi-filter at 10 MHz, the inductor stays inductive with margin.
Active Production — No Lifecycle Risk for New Designs
Murata lists the LQH43PB3R3M26L as Active. The 1812 footprint is a standard size shared across the LQH43 series.