1.2 µH at 425 mA — the DC bias and loss trade-off
The LQH32MN1R2M23L is a Murata drum-core wirewound inductor in the LQH32 series, rated 1.2 µH at 425 mA with a maximum DC resistance of 600 mOhm. The 600 mOhm DCR at 425 mA produces about 108 mW of self-heating — negligible for most board-level power rails, but worth factoring into the thermal budget if the inductor sits near a hot regulator or in a confined enclosure. Unshielded construction means the magnetic field radiates into the surrounding board area; keep sensitive analog traces or high-impedance nodes at least a few mm away from the body.
Frequency ceiling and Q factor
Self-resonant frequency is 100 MHz, so the inductor behaves as an inductor up to roughly that point — above SRF the impedance turns capacitive. Q factor is 20 at 1 MHz, which is the test frequency for the inductance value; at higher frequencies the Q typically rises then falls toward SRF.
Package, temperature, and board-fit
Operating temperature range is -40°C to 85°C, covering most industrial and commercial environments but not extended automotive under-hood conditions. Supplied in tape and reel — the base product number is LQH32MN, so the reel marking and packaging label carry the full 12-digit order code.