10 µH at 300 mA — what the ratings tell you
The LQH32CN100K23L is a Murata drum-core wirewound inductor from the LQH32 series, rated 10 µH ±10% at 1 MHz. The 300 mA current rating is the DC current at which the inductance typically drops by 10% — above that, the ferrite core begins to saturate and the effective inductance falls off. With a maximum DCR of 572 mOhm, the resistive loss at 300 mA is about 51 mW, well within the 85°C ambient ceiling. The self-resonant frequency is 26 MHz, so the inductor behaves as an inductor up to roughly that frequency — above SRF, parasitic capacitance dominates and the impedance turns capacitive. For a 10 µH part, this is typical for power-line filtering and DC-DC converter output stages switching in the 1–4 MHz range.
The unshielded construction means the magnetic field radiates — keep sensitive traces or other inductors at least a body-width away to avoid coupling. Surface-mount, supplied on Tape & Reel or Cut Tape.
Marked as Active on the manufacturer's lifecycle record. No successor or second-source cross-reference is on file — the LQH32CN100K23L is the current production order code for this 10 µH variant.